Flaps 45, Trailing Cone, Tufts - Flt 7 - Hakan's Modified Lancair 320

Full flaps and two methods of pitot static calibration. So stoked to use the #jellybeanthorp trailing cone again. Hakan pulled out all the stops, I think you'll dig. See you in the comment section.
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Timestamps:
00:32 Introduction
01:03 Mx Performed
14:09 Trailing Cone Installation
16:04 Preflight Briefing
24:45 Trailing Cone Ground Operations
29:10 45° Flap Envelope Expansion
32:24 Stall Matrix
49:29 Post Flight Debrief
58:59 Hakan Debriefing Stall Video (best part of this video)
---Flt 007 Flight Report---
Summary:
Flt Date 12/5/2020
Engine Start: 10:20 LCL
Engine Shutdown: 12:35 LCL
Flt Time: 1.3 HRS
Landings: 1
Fuel State Takeoff: Full Tanks
Total Time After Flight: 4.9 Hrs
Chase: None
Data: My initial impression is that the difference in drag between 35° and 45° flaps is the most significant change. The aircraft handles nicely during a full flap stall with plenty of roll control and little tendency to drop a wing. The elevator position/force difference for flt 7 vs flt 6 was significant, likely due to the VGs added to the wing and tail. It took more elevator deflection to stall, and there wasn't the significant force change during the stall that was observed on flt 6. Worth noting, the flaps up stall is now the limiting stall.
The trailing cone showed little difference vs the ship static (stock location) in all configurations tested. The biggest difference was in the last 5 knots of the stall, during which the ship static would show an airspeed increase (~5 knots) while the airplane was still slowing, and the trailing cone showed a steady reduction in airspeed.
The GPS clover leaf showed an error (12% clean, 15% 35° flap, 20% 45° flap) at 1.2 VS, with the indicated speed being higher than the GPS calibration speed. Based on Hakan's CFD, he believes this can mostly be traced to pitot error due to high AOA.
On landing at 110 KIAS (as all previous landings) the difference in actual speed was apparent. Estimate the airplane was 15 knots faster than previous landings (recommend future approaches at 95 KIAS)
Power Settings
Take Off WOT/2700
Climb WOT/2500
Cruise WOT/2500
CHT Limit - 440°F Climb
420°F Cruise
Oil Temp - 215°F
Airspeed
VS0 - 57 KIAS (52 KCAS)
VS - 77 KIAS (70 KCAS)
Vrot - 83 KIAS (75 KCAS)
VFE - 110 KIAS (100 KCAS)
VLE - 134 KIAS (122 KCAS)
VA - 157 KIAS (143 KCAS)
VNE - 259 KIAS (235 KCAS)
LLF - +3.8g/-1.52g (flaps up)
+2.0g (Flaps Down)
Maintenance Before Flight
Aileron VGs
Wing Body VGs
More Tufting (Wing, Fuselage, H-Stab)
Static location back to stock
Transponder Replaced
Altitude Encoder Replaced
Added Aileron Bottom Gap Seals
Replaced Aileron Top Seal
Canopy Seal Replaced
Static Overhaul
New Alternate Static Valve
Inspected Flaps
Serviced Fuel
Added Trailing Cone to the alternate static port
Planned Flight Profile
Engine Start
Take Off
Initial climb 100 KIAS
First Power Reduction WOT/2500
Climb 125 KIAS to '10.5K MSL
45° Flap Extension at 90 KIAS HQ CHK
45° to 100 KIAS HQ Chk
45° to VSO, HQ Chk
3x Flaps up-Gear Down Stalls (Ship Static)
3x Flaps up-Gear Down Stalls (Cone Static)
3x Flaps 35°-Gear Down Stalls (Ship Static)
3x Flaps 35°-Gear Down Stalls (Cone Static)
3x Flaps 45°-Gear Down Stalls (Ship Static)
3x Flaps 45°-Gear Down Stalls (Cone Static)
GPS Cloverleaf at 1.3 VS
GPS Cloverleaf at 1.3 VS35°
GPS Cloverleaf at 1.3 VS0
RTB
Normal approach
Flaps up landing (110 KIAS)
Bailout altitude: Out of control below 5,000
If less than 50% of control remaining RTB
If we can't fly at or below 120 KIAS with more than 10% of control remaining, bail out.
Squawks:
Recommend different engine monitor with more display area
Recommend different airspeed indicator w/ only knots
Recommend different airspeed indicator ~40 Knots
Brakes Soft
2800 RPM prop governor setting
Idle 1,000-1,200 RPM
Throttle/Mixture moves with gear retraction
Running Rough?
Left Elevator Gap Seal came off
Cylinder #4 the hottest (410°F Peak)
Next Steps:
Consider new static location adequate, remove trailing cone. Consider slow-speed handling and minimum speed adequate until verified with landing tests. Need to understand the cruise speed performance hit with the VGs, and consider removing these devices until the correct balance of high and low-speed performance is reached.

[@MrRainbowYoshi]

The differences in watching the work done with Hakan versus the work done on the Raptor program are wild. It's so cool to see what a proper relationship between the owner/designer and flight test crew can be.

[@utopiasnow]

Thanks for saying that. In Peter's defense, it's a lot simpler when all the program stakeholders are connected to the meat servo in the cockpit. Since he is the whole program there is never the need to organize the decisions and thoughts, it only has to make sense to him. My favorite part of this job is figuring out how to predict and communicate abstract and difficult problems and concepts, and then as much as possible include the stakeholders in the decision tree. When it was just me alone in my hangar with my race plane I didn't have to organize any of those thoughts, and while I could move a lot faster, and certainly could take more risk, it wasn't very scalable. As soon as you have a team the whole game is getting everyone's smarts into the field of play and that is endlessly fascinating.

[@MrWATCHthisWAY]

@@utopiasnow - love the term Meat Servo!! Don’t mind if I borrow it do you, Meat Servo 😂

[@Flywithhamdan]

Could you make a video on how you became a test pilot.we all would love to hear it from ya 🔥

[@utopiasnow]

Great idea, thank you for asking!!

[@ashsmitty2244]

I agree, would love to know.

[@alphonzo12345]

I third that motion. All in favor say aye!

[@cirrusflyerh2843]

It’s an Eye, from me. Would be fascinating to understand the test pilot route.

[@Flywithhamdan]

@@utopiasnow you are an inspiration to us😍 ,there are a lot of us commercial pilots with engineering background like myself who would really appreciate someone who can explain in detail the civilian pathway to become a test pilot .

[@noelwade]

Holy moly, Hakan went to *town* on that bird between the last flight and this one... So much work & effort! It warms this sailplane pilot's heart to see those control-surface gap seals, too. ;-)

[@utopiasnow]

Hakan doesn't slouch, such a pleasure to work with him.

[@stonebear]

@@utopiasnow You weren't kidding "wait 'til you see what he's got cooked up." A hot ship with a big damn set of Fowlers to make it go Real Slow is a performance nerd's pipe dream, and he's doing it *right here*... I kinda figured gap seals were part of it, but the plethora of VGs... Pure Finest Magic. Congrats to the both of you, awesome stuff.

[@adamhoutman1765]

Holy cow that is a low stall speed for a Lancair. Congrats Hakan!

[@utopiasnow]

So awesome!!

[@sblack48]

A lot of hours for each knot. Reducing stall speed is really hard. Hakan seems like a very reserved dude. I would have been doing an nfl touchdown celebration.

[@chrisburger4518]

I'm just a student pilot, but I am learning a lot from watching these videos. More pilots should be watching and learning from Elliot (views should be much higher). GREAT videos!!!

[@justinparker7795]

I'm an old (60) retired agpilot, I learn so much from each video!! a Big Thank you for doing this!! So Awesome!!

[@utopiasnow]

Thanks for the comment. I bet you have some stories!!

[@justinparker7795]

@@utopiasnow Maybe we'll cross paths some day at Stead Reno!

[@leerogers6423]

The problem solving effort by Hakan is remarkable , hats off to him. As for the test flight it's fascinating to see the empirical evidence backing up the theory and moving the project along. Great video , more please PS...... Seasons greetings from a cold and wet England.

[@utopiasnow]

Thank you Lee and happy holidays to you as well.

[@OFD271]

The door bell is driving my labrador nuts and I'm laughing pretty darn hard... Great vid !

[@utopiasnow]

Thank you Jeremy!

[@utubeaccess7]

Oh please God no more. I'm not 10 minutes in and the 'sound effects' every 20 seconds are driving me up a freaking wall to the point I may just stop watching. Please dont continue with this obnoxious feature in your videos.

[@imbok]

FANTASTIC video - I love the nitty gritty details of a test program. Also, Hakan's companion is sporting some pretty nice bell bottoms. Fashion in aviation is important!

[@utopiasnow]

Thanks for the comment. It has been a real joy of a program and so nice to have a customer willing to share in such an open forum.

[@johnfife3062]

Congratulations to Hakan for the proven success of his design. Good chuckle at 31:30 -- you've just told him that his stall speed is literally off the chart/gauge. This is a big, poignant moment -- the dude's so successful he needs a new panel to measure how successful, and *poker face.* Took awhile to settle in before we got "super."

[@utopiasnow]

I am glad you caught that. Even my thick engineer skull caught that as an important "story moment". Thanks for coming along.

[@ronpurcell9984]

That was entirely cool, having the tufts to watch throughout the stalls was awesome. It was suprising to me how fast the air reattached and the wing would start flying again. Fun to watch, Thanks Elliot.

[@utopiasnow]

I am glad you enjoyed it!

[@maxlobry4508]

The content is so badass, and he explains so well what's going on, super video

[@utopiasnow]

Thank you Max!!

[@jonathanpainter511]

Great video! Always a great day to see a new one show up. The editing was fantastic, what a ton of work! The inflight footage was cut just right to convey the data and give the broad picture. Thanks for the mountain of work on this video to make it so easy to watch and follow the day's test progression!

[@utopiasnow]

Thank you Jonathan. I appreciate the feedback. Sometimes it seems like, if only just in fleeting glimpses, we are getting better at this youtube stuff. :)

[@chrisbowpiloto]

Wow Elliot, You are really raising the bar both in levels of education and entertainment. Well done!

[@utopiasnow]

Boy its taking both hands. Thanks for the feedback

[@watchfordpilot]

I'm not a test pilot but fascinating, insightful. Full of things to learn as always. Learning points for me, if I understood it correctly, lack of induced airflow from prop, inboard flow disruption and location of static port needs careful research. Of great interest was seeing the ASI twitch at the break before you recovered from the stall, more so with flaps extended. My thinking muscle is in overload. luvin' it ;) Great, thanks and Merry Christmas all - cheers.

[@utopiasnow]

Thanks for watching. The difference in the indicated airspeed behaviour at stall with and without the trailing cone might be my favorite part of this video. I feel like you can see the pressure bands from Hakans CFD sliding around on the aft fuselage. Soo cool. Thanks for coming along.

[@adamkinsey3139]

You guys are awesome. Cheers to Hakan!! What incredible quality KZbin content! Thank you so much for bringing us along!!

[@utopiasnow]

Thanks for watching! Great to have you here!!

[@monte01232003]

Another amazing video Elliot. It’s like a “master class” in research and development. Fascinating dichotomy between practical use and accurate data. It seems it would be more accurate to use a dedicated airspeed indicator (digital) utilizing the trailing cone to generate precise numbers for air speeds in various configurations and power settings. But in the real world you fly based on the analog airspeed indicator. Regardless of whether one modification or configuration lowers the stall speed by 1.68375 kts, you can’t read that or fly that using the analog ASI, so it’s strictly academic at that point. Great point in the debrief about approaching at 100, but that’s based on the old static port location. Is it worth doing all of the initial flight testing and data crunching using an independent ASI with the trailing cone and then do the cloverleaf work at the end of the program when all or most of the variables have been removed? Keep up the great work and a huge congrats to Hakan on what appears to be a very successful mod. Merry Christmas to both of your families!

[@utopiasnow]

thank you for the comment. Instrumentation is absolutely on the table. I can't over stress how tough it is not to rabbit hole on this project. There are immediate thoughts of laboratory grade instrumentation and custom-built pitot probes. But on the other side I know how bad Hakan just wants to get back to flying and how impractical all this data will be a year from now. Thanks for coming along.

[@francisschweitzer8431]

MUCH BETTER!!! Gap Seals on Ailerons and Elevators .... NO REVERSED TUFTS... along with the VGs installed was effort well spent. Side note: I was a Cherry Picker qualified Crew Chief on tankers and I’m was involved in a Trailing Cone install only Once on my jet. A rather interesting deal....

[@utopiasnow]

Great stuff, sounds like you had a good time. Thanks for the comment.

[@adamdobrzanski6631]

I just knew the cone was going to make an appearance for this project after the last video. Really pumped when that thing comes out! I loved all the doorbell noises, Gid's airplane is rad and editing. Can't wait to see how much cruise is affected by the DG's. Great catch on the throttle levers. The engine wasn't happy, the in cockpit camera shots have vibration that wasn't there before. This project has went through some growing pains at the beginning, but you and Hakan have risen to the challenge each time. Sweet series! Can't wait for the next one.

[@utopiasnow]

Thanks for that. I appreciate you coming along. I feel so fortunate that Hakan is willing to share this journey on such an open forum.

[@Gmoney_72]

Dude, edge of my seat! Had some family watching with me! Even captured there interest. Spent the afternoon showing them some of your other adventures.. even the one that HURT! Confirmed at the house today. You are a BADASS.. Never knew long term TWERP was to re-motor Siren.. time to blow the dust of her and let her spin some high speed laps down low.

[@utopiasnow]

Thanks for the comment and support. I appreciate it.

[@jamesyoungblood555]

Alot of very good information on what makes the airplane fly and not fly. Thanks so much. Shalom

[@utopiasnow]

Thanks man, I appreciate you coming along.

[@therish7169]

Superrrr! Great result, Hakan looked so happy 👍

[@utopiasnow]

I agree, happy Hakan is good enough for me

[@robertlafnear4865]

First thing ..... Merry Christmas to you and your family from ours.... Second,.... Nice plane and IF I ever design, build and or need someone to test it... YOU will be the one ! Nice Video . hope to see ya at RENO next year........ and ...... Happy New Year.

[@utopiasnow]

Robert, thank you for saying that. Merry Christmas to you and yours, and let me know how I can help you design and build that airplane!!

[@7up3down32]

Wonderful video. I can watch/listen to geeky airplane stuff all day! Truly wish the gentleman with the Raptor prototype out east would’ve continued to get help from y’all. Just a lot different mindset, very professional and firm on go no goes. Look forward to the next video! 👍🏻

[@utopiasnow]

Thanks for the comment.

[@utopiasnow]

Thanks for the comment. I am glad you enjoyed it.

[@lostkiwi2695]

Awesome video! I've never been so excited to see such a low stall speed on an airplane I don't own, by a guy I don't know! (my wife asked me why I was shouting YUSSSSSS! at the screen) Stoked for Hakan that the flap mod was so successful! Looks like a fun program and a great guy to work with.

[@utopiasnow]

Glad you enjoyed it! Hakan is just about as good as they come. Thank you!!

[@danielbasovitch5087]

Thank you Elliot, for your prompt reply. I had not taken into consideration possible smoke in the cabin and didn't know that the mask is built to give you crash protection to your face and mouth. Stay Safe.

[@utopiasnow]

Thanks for the comments!

[@snaproll94e]

Tuffs were very telling looking at the stalls with and without flaps. Outboard wing sections didn't stall until no flaps when the angle of attack increased. Makes me wonder how they will behave in a slow, turning accelerated stall without flaps? Better sneak up on that one. Great videos, thanks to you and the owners for sharing!

[@utopiasnow]

Thanks for the comment. Yes the flaps up stall is definitely the one to watch now.

[@challenger2ultralightadventure]

I'm building my own experimental aircraft, and will be doing test flights this spring. I thought I was ready for the details involved. Clearly I need to step up my game after watching this!

[@utopiasnow]

You can do it!! It's all about taking pleasure in the preparation. Let me know how I can help and how it goes!!

[@Jerryberry172]

I love aviation and the geekiness that comes with it. You’ve exposed us to more things to research than our wives appreciate!

[@utopiasnow]

awesome, hear hear!!

[@kevchilton908]

So intriguing to see the work put into this. Thank you for taking the time to post these vids Elliot 👌

[@utopiasnow]

Thank you for watching and commenting!!

[@ethanbrown1235]

Love the David Martin snap roll cameo. Great vids!!

[@utopiasnow]

Thanks man.

[@johnhardy391]

Congrats on a successful test, what an exciting project! Thank you for sharing this long format, it's super interesting stuff.

[@utopiasnow]

Glad you enjoyed it!

[@geauxlsu1987]

Keep the technical vids coming!

[@utopiasnow]

Thanks man

[@gxlbiscuit]

"And another one..." Elliot is the dude

[@utopiasnow]

Thanks for the comment!

[@jeremyjabaay]

Another good one! Thanks Elliot.

[@utopiasnow]

Thank you Jeremy!!

[@DreadDoctor]

Now that is an Aviation video I can get into.. very nice job . Love the vids.

[@utopiasnow]

Thanks man!!

[@RickSoaring]

woah 1 full hour! Wow, very nice. Very productive flight. Looks like its time for a twin speed indicator setup. One for low speed and one for high speed :P

[@utopiasnow]

Thanks Rick. I really tried to keep it tight and it still ended up at an hour, my apologies. There is currently a lot of talk in the program about new gauges. Such fun.

[@fiedlertimify]

Love your vids! Were you worried about vapor lock on takeoff after that shut down? I’m always worried after I fuel of having my io520 quit due to some air in the lines.

[@utopiasnow]

Cool question. We did the run-up after the restart after we laid out the trailing cone. So no I wasn't too worried. But that is a great example of the added complexity of running the trailing cone. Thank you!

[@reevinriggin3570]

Dang it Elliot. I love to geek out with the aerodynamics lessons you are giving me for free. It is so helpful in understanding why we do what we do when training for a PPL. I am one of those that need to understand the "why", not just learning to "do" because my instructor taught me to do it this way. Why do certain aircraft fly the way they do and why they respond differently than other aircraft. Fascinating stuff. Thank You! That said. When ever you use the door bell sound effect, my dog goes ape shit crazy. I have to keep backing up and reviewing what you said because I can't hear when the dog is barking like crazy.......annoying. Anywho. If you happen to see this wishing a Merry Christmas to you and your family, and a Happy and Healthy New Year.

[@utopiasnow]

Thanks for the comment. I am glad you enjoyed the video and will take your doorbell note into consideration. airplanes are cool!!

[@g6rcteam81]

Great job again with the video. This supplied my inner geek a great wake up call this morning . And it looks like the Design is working and that is crazy cool .

[@utopiasnow]

Dood, this was such a fun day on such a cool program. Really exciting.

[@g6rcteam81]

@@utopiasnow Nice flying by the pilot by the way.

[@darshanp651]

Great Engineering Tid-bits ! Would love to see a video of their own!

[@utopiasnow]

Thanks man

[@wgmskiing]

This is a fantastic presentation of really cool work guys. Great job.

[@utopiasnow]

Glad you enjoyed it!

[@Mariano.Bernacki]

I like that you kept this one about the flying and not unrelated family life scenes. Thanks!

[@utopiasnow]

Thanks for the feedback

[@Subcanis]

Fascinating. Thanks Elliot.

[@utopiasnow]

Thank you Chris!!

[@mikercflyer7383]

The airplane is really cool. Merry Christmas.

[@utopiasnow]

Merry Christmas to you!!

[@bartofilms]

Great Improvements! I'm curious if Mr. Hakan is doing all these mods and flight tests for this plane only, or if he's looking to offer STC kits for other LanceAir owners. A speedy LanceAir with slow flight behaivior of a 172 would be very desireable... 😋👌.

[@utopiasnow]

Great question, I havent gotten a firm answer on this yet.

[@SooperToober]

Such attention to detail

[@utopiasnow]

Trying, with both hands.

[@dougstates]

Looking forward to this!

[@utopiasnow]

Thank you Doug!

[@dougstates]

Just finished, great coverage of the testing and good to see the results.

[@thomasholland7421]

Sorry if this has been asked... I was curious as to why the videos seem to show the wing drop being initially corrected with aileron, is it a deliberate input or instinct?

[@utopiasnow]

Great comment, good eye. The fact that the aileron is not triggering a tip stall is a great indicator of how well the aileron VGs are working. a testament to Hakan!!

[@mfree80286]

Absolutely stellar, gentlemen.

[@utopiasnow]

Thank you Michael!!

[@johngoscinski1995]

I've been watching the series, and I thought the slot-gap on the flaps was looking awfully tight. But with internet video and all, I figure I didn't have enough info to make an informed comment. So, very interested to see Hakan point out that the slot was indeed very small. I did not pick up tho, if this test was flown with the flaps as they were, or with a reconfigured gap? DO we think the stall speed is lower due to the reconfigured flaps? Will be interested to see the response of the plane to go-around type throttle transients at these slow speeds.

[@utopiasnow]

on Flt 7, 8, 9, and 10 we looks at both 35 and 45 deg flaps. Hakan is still deciding which he prefers. Thanks for the question. You are exactly right about transients. Videos to come!

[@Erik-rp1hi]

Thanks to both of you for putting this test flight program together for out here in cyber space. I think sealing the elevator gap was a good idea. I don't understand, even with no flaps the airspeed indicator read below 60 at stall. Was it the same speed a 45 deg flap just with a hard break? I read VG don't affect speed. Will be interesting to see the next installment.

[@utopiasnow]

Erik, great questions. Short answer is there is a lot more here but the video was an hour and I needed to wrap it up. Not to give away the ending but between flt 8 (not yet edited) and now Hakan has spent a lot of effort investigating the errors on the total pressure (pitot) side of the instrument, and they are significant. It is all so fascinating. Thank you for coming along.

[@aviatortrevor]

I heard you over the radio a few weeks ago on 23.45!

[@utopiasnow]

I hope I sounded cool ;)

[@aviatortrevor]

@@utopiasnow Super duper cool 😎. I didn't want to interrupt, but it was a funny coincidence that the previous renter of my PA-28 had left the radio on 23.45. I heard you on the ground at CRQ and flew to L78.

[@vr6chrisvw]

Yes!!!! I've been waiting for this video.

[@utopiasnow]

I look forward to your feedback Chris!

[@vr6chrisvw]

Beautiful work. Time for me to head out to the airport and do some more static testing myself.

[@steveshoemaker6347]

Thanks Elliot...Merry Christmas & God Bless you and yours ...Damn l am so old now lol

[@utopiasnow]

Thanks Steve. You and me both.

[@tropicthndr]

Dump all the VG’s and just do the one mod that takes care of all the problems, “Beluga belly mod” get the high speed cruise and cures the wing root separation, keeps the air flowing smoothly over the tail.

[@utopiasnow]

Thanks for the comment. Huge fan of Lee and all things breathless, but I am not familiar with the low-speed handling benefits of the Beluga mod. I would be excited to see how it keeps that massive separation at the wing root attached.

[@ScottsSynthStuff]

Mid-span on the flaps at all extensions beyond 0 degrees, there is a tuft that is showing turbulent airflow, at all airspeeds, on both wings. Is there a VG on the upper wing surface ahead of that position?

[@utopiasnow]

My assumption has been that area is separated by the flap hinge "canoe" forward on the lower surface. But I am open to discussion.

[@mfree80286]

@@utopiasnow There's visible structure or material in the gap where that tuft is aligned, so I'd wager your assumption is correct.

[@RoelBaardman]

For Airspeed indication verification it might make sense to run something like XCSoar on a phone. It contains an algorithm to calculate the wind from circles being flown with relatively constant speed. Using the wind indication, it converts groundspeed to TAS.

[@utopiasnow]

Roel, thank you for the comment. You are exactly right, there are many ways to skin the pitot calibration cat. Most require more instrumentation and or better data logging than I had this day so we made due. Thank you for bearing with us and coming along.

[@RoelBaardman]

@@utopiasnow You're absolutely welcome! The main reason for mentioning it was that instant feedback might improve efficiency during the flight and thus value-for-money for you and your customers.

[@thegodofhellfire]

airplanes are cool!

[@utopiasnow]

Thank you Devon!!

[@garyspencersalt9449]

Why, if I understand correctly are the stalls conducted with full-up elevator trim? Use of aileron in a stall - I was drilled primarily use rudder only to avoid [minimize] the possibility of a severe wing drop,

[@utopiasnow]

Gary thanks for the comment, great point. It's a great indicator of how well the aileron VGs are protecting the outer wing that the aileron is not triggering a tip stall.

[@keepyourbilsteins]

I geeked out harder on this than I ever have on any YT aviation video. Currently building my second part 103 and making it "fungible" in regards to Vmax. A 254# (minus chute) ship that cruises at 100kts. What is your inseam Elliot? May need to drill some alternate seat mount positions.

[@XX629-Bulldog]

Continuing to be really interesting. Shame / surprising he mislocated the static port but at least thats fixed now. I’m surprised that more than two amendments have been done under testing rather than trying one then the next etc. VGs plus gap seals as well as confirming the static source. Thanks Elliott, really insightful.

[@watashiandroid8314]

The goal is not to find out what changes do what, the goal is to make the airplane work as intended (plus extra test flights add cost). I tell myself this, but the aero nerd in me was still disappointed that we wouldn't learn the effects of the individual changes! lol

[@utopiasnow]

@@watashiandroid8314 wow, you hit the nail on the head. It's so easy to get trapped in an endless loop of discovery. You have to tie up the engineer in your head and remind him we bought this airplane for another purpose besides rehashing aero theory. Thank you for the comment.

[@utopiasnow]

Chris, thank you for this comment. I really struggle with this on this program. Yes by making so many changes at once it becomes really hard to tell what happened. But the effort required to get a flight off is so high that we have to compromise and remind ourselves what the goal is, instead of being distrated by every shiny object in the space. Thank you for coming along!!

[@pipercomanchedownunder693]

Really enjoy the in depth videos, and luv the Lancair. Thanks for posting them.

[@utopiasnow]

Thanks for watching and commenting. I am so glad Hakan is generous to share his program on this open forum.

[@NicksStuff]

13:00 You should get an external (bluetooth, for instance) GPS module, they easily do 10Hz (more if needed but you probably don't need more)

[@utopiasnow]

Thanks, we helped a company develop a similar technology. It was super helpful but typically on these types of programs we don't have the time. Anyway, thanks.

[@hofadry1073]

hi, im just wondering what you are trying to acheive with this project? thanks

[@angusholland5393]

To lower the stall speed

[@utopiasnow]

@@angusholland5393 thanks

[@utopiasnow]

As stated in the video the goal is the holy grail an airplane that lands super slow and goes super fast. In this case 55 - 190 Knots.

[@hofadry1073]

Elliot Seguin that sounds really interesting thanks.

[@tropicthndr]

I think the holy grail has already been achieved plus more in this airplane. “Pipistrel Panthera”,high speed cruise, low landing speed and best of all, with four people or folding bikes in the back. That’s beyond holy grail.

[@ForFunFlyer]

This is so interesting! Good job! 🤙🏻

[@utopiasnow]

Thanks man.

[@j.w.perkins6004]

Have you flow through the stall for any extended period? (5 seconds +)

[@ttaylor7777]

Get a Winter airspeed indicator for a glider for better readings in the 40 to 70 knots range.

[@utopiasnow]

Thanks man!!

[@jestertoo]

Great video and fantastic stall performance. One unrelated question I've had for a while, how was that propeller length/shape chosen? It looks "off".

[@utopiasnow]

It's just a big motor on a little airplane. Thanks for the comment.

[@jestertoo]

What engine is in it? Did I miss that early on?

[@robertcringely7348]

Great work, Elliot. I'm sure it was a very satisfying day for all involved. The smaller VGs are StolSpeeds, right? I was surprised at their placement on what looked like the 50 percent chord line under the horizontal stabilizer. StolSpeed recommends putting them at about 10 percent chord under the HS and I have seen them also placed just before the elevator hinge line. Why did Hakan put them at 50 percent? I have a set for my T-18, which of course has a stabilator, so I've been just expecting to put them at 10 percent as recommended. Any insight would be appreciated, thanks.

[@utopiasnow]

Bob, great to hear from you!! When are we going flying! I hope Hakan reads this so he can fill you in. On flt 8 (not yet edited), we started removing VGs. I think you will enjoy that footage. Merry Christmas!!

[@Hlongbridge]

The recommendation is to put them 4” ahead of the hor/elev split.

[@robertcringely7348]

@@Hlongbridge got it, thanks. Of course my T-18 has no elevator. I wonder where to put them?

[@Hlongbridge]

@@robertcringely7348 I would say about 10% chord would work fine!

[@XX629-Bulldog]

Elliott, sorry second question. Does he have an ability to reflex his modified flaps? Thinking to his top end mission we used to see beyond 190kts just on 160hp in my dads 320 with reflex flap. But getting it faster was like popping a speedboat onto the step, once there awesome.

[@utopiasnow]

wow, thats super cool. I hadn't heard of that mod to a lancair 320.

[@XX629-Bulldog]

@@utopiasnow TBH I thought all ‘stock’ 320s and 360s used reflex flap. That said I’ve only flown my dads G-FOPP and the demonstrator N320L with their test pilot Dan Goetz which was 29 years ago but I’m fairly certain he demo’d it!! 29 years ago! My god!

[@Hlongbridge]

The flaps are reflexed -7 degrees in the up position.

[@XX629-Bulldog]

@@Hlongbridge superb. I did some back checking and his 160hp 320 exceeded 300mph straight and level in testing so you should be easily good for 190+ kts. We did have interchangeable short and long wing tips, I’m afraid i cant remember which that was with but i know he used to get higher efficiency at altitude with the long tips on. Really enjoying seeing yours coming alive.

[@randyjones5736]

Great video! Did you land with the flaps for this flight? Or is that still premature?

[@utopiasnow]

We didn't land with flaps on Flt 7 or 8. But you'll see in the video there was shift at this moment in the program from a quantifiable goal (like stall speed) to a more qualitative goal like minimum safe landing speed. It's such an awesome moment in the program, I hope I was able to communicate it in the video. Let me know what you think.

[@randyjones5736]

@@utopiasnow Thanks. Both of you were definitely excited with the flight and the shift that you made. It was conveyed perfectly in the video! Very well done. Looking forward to hearing about the next flight!

[@sblack48]

Ah so you went for the harbor freight static cone!

[@utopiasnow]

Hahaha

[@josephdupont]

So did the car hold the cone???? to keep it from dragging//

[@utopiasnow]

We put the cone in the cockpit for the taxi to the runway, then it dragged from the hold short line until the airplane was airborne.

[@josephdupont]

@@utopiasnow I know that .. just a suggestion like they use cars to help land a U 2

[@aflyingman]

Still not used to hearing "contacted Ramona Tower"

[@RoelBaardman]

Very insightful.Thank you for posting! I'd like a little bit less interruptions with sound-effects. The videos require a lot of effort to watch, even though most concepts you introduce very quickly are known to me. I feel it's mainly the tempo. Please consider keeping the main matter in the video and reduce the amount of sound-effect assisted short shots.

[@utopiasnow]

Thanks Roel. I have struggled with how to maintain attention during long "selfie" explanations. Looking at the statistics so far it appears that though jarring to watch the interruptions work as far as keeping the audience tuned in. But I agree its awfully disruptive. I promise to keep trying to bend my engineer brain around this story telling thing if you promise to keep the real feedback coming. Deal?

[@RoelBaardman]

@@utopiasnow Thanks for the reply. Deal! Perhaps it's a matter of preference, or balance between educational and entertainment value. I'm sure you'll figure this out with some trial and error.

[@noelwade]

OK, at the point where you're running videos to an hour in length, you *have* to set up a Patreon account, or BuyMeACoffee, or something like that... Ya gotta let fellow aviation nerds pitch you a couple of bucks for the effort you're putting into editing and sharing all of this... Its real work, man!

[@ryanjones3824]

He did! The first time ive become a patron of anything www.patreon.com/ElliotSeguin

[@utopiasnow]

@@ryanjones3824 Thank you Ryan, it really means a lot, especially in these times.

[@utopiasnow]

Thank you Noel. I appreciate the support.

[@noelwade]

@@utopiasnow - You're welcome! (and oops, you can tell I was so excited to watch the footage that I didn't expand the video description. Although can I suggest you mention your Patreon in the intro/outro of your videos?)

[@foxtrot789]

Man I love your videos but are all the sound effects necessary?

[@utopiasnow]

Thanks for the comment. The kids are doing it to break up long selfie shots. MY apologies I will continue to attempt to make the jump from engineer to story teller.

[@helimech1311]

My dogs went nuts at the door bells....

[@mfree80286]

Wouldn't it be interesting to come up with a simple active vortex generator that's skin mounted with minimal intrusion, perhaps a double layered polymer strip that's creatively laser cut and sonically welded so sliding the top segment raises folded shapes, much like how a pop-up book or christmas card works. Cruise clean, deploy VG for otherwise.

[@utopiasnow]

Very cool, I like the idea!!

[@zmatt]

Ding dong!

[@utopiasnow]

the sound efects were an experiment. I appreciate you bearing with this engineer while he tries to be young and hip. :)

[@zmatt]

@@utopiasnow imgur.com/b0VPJT0

[@utopiasnow]

@@zmatt yes, exactly

[@mahanehsani1246]

👏🏻👏🏻👏🏻

[@utopiasnow]

Glad you dig!!

[@ILLEagle_1]

Yes please less weird sound effects. My dog especially doesnt like the doorbell noise.

[@howardkahn2316]

I (And my three goldens), second that. Made watching the video very difficult.

[@CFoxtrot25]

Omg Yes! Please for the love of god, stop with the door bell's... My shepherds flip their shit everytime they go off.

[@stay_at_home_astronaut]

My dog doesn’t like the doorbell, either.

[@utopiasnow]

Thanks for the feedback guys.

[@Habakouk77]

Just out of curiosity: Would it be a possibility to use two different Speed indicators at the same time, one working on the ship static ond one on the cone static, just to half the number of stalls you have to perform (or double the number of datapoints with the same flight duration)?

[@utopiasnow]

absolutely, great comment!!

[@Habakouk77]

Thanks for the reply! I was not shure if missed a (operational or technical) reason that would not allow any benefit. And by the way, I totally agree with you: airplanes are cool! You should start selling merch with this sentence!

[@villarsrl]

Every time you ring that stupid bell my dogs start barking like nutz! I will have to stop watching your videos if you keep doing that! LOL

[@utopiasnow]

My apologies

[@wgmskiing]

If you want to continue the analog theme you could plumb in a sailplane ASI. There are popular models from Winter with exponential indication for sensitive measurement down in that 40-50kt range where we thermal. wingsandwheels.com/avionics-instruments/airspeed-indicator/winter-instruments/winter-instruments-6-fms-asi.html They won't do the full range for a Lancair but they cover the slow speed work.

[@utopiasnow]

Thanks Garrett!!

[@gmcjetpilot]

55 kts is not slow... well slow for a C-152 but Van's aircraft stall at 55 MPH.... and still can do close to 190 kts (if not do 190 kts) out of the box.

[@utopiasnow]

Thanks

[@danielbasovitch5087]

Elliot, I know you wear the mask so you have a mic by your mouth at all times, but are you breathing ambient air or are you on a bottle during these flights?

[@utopiasnow]

I wear the mask for three reasons: 1 Crash Protection 2 Better Comms 3 Smoke in the cockpit More infor here: kzbin.info/www/bejne/l17PlJiXhLFle5o

[@stay_at_home_astronaut]

So it WAS an improperly placed static port that was giving you artificially high airspeed indications!!!!! Ha! I knew it!

[@utopiasnow]

The static was not a small contribution but the VGs were a significant factor as well, wait until you see what we did next.

[@stay_at_home_astronaut]

@@utopiasnow I was surprised at how _well_ the VG’a reattached the flow around the wing root. Impressive! So what kind of sink rate are you getting with power off and fully deployed flaps? Do tell!

[@Daxun155]

Hey Elliot love the videos but the sound effects editing during the plan explanations were too much. Your content is so well produced but so well explained to a layman, it’s jarring.

[@utopiasnow]

Thanks for the feedback.

[@n6408s]

I am certain there is some good information in these videos. But it gets to the part where his face is filling up the screen and the hands are failing everywhere, I just can't watch. I suppose that I should just minimize the screen and listen.

[@utopiasnow]

I hope you changed videos before anyone got hurt. My apologies in the meantime for any discomfort.

[@michaelyoung3337]

I miss the short videos.

[@utopiasnow]

Which ones? The cutty music videos?

[@michaelyoung3337]

@@utopiasnow I think that great KZbin videos are a combination of education and entertainment. An hour-long deep dive on a topic is highly educational and I am sure many love them. However, it may lean towards being too much emphasis on eductation and lose some attention without some entertainment. Of course, this is one person's opinion, glad to have the channel no matter what. Cheers, Mike

[@flymachine]

If a Lancair and a 737 meet and have a baby they make something like this

[@utopiasnow]

Awesome

[@VoidedWarranty]

Just a bit of feedback, the door bell noises sets the dog off every time, please consider a different sound next time

[@stonebear]

What actually got me was the little tinker-bell ringy noise earlier in the vid; it sounds like my sweetheart's text tone, and it was the _two foot_ going nuts, not the furry four-foot... :)

[@utopiasnow]

Thanks guys

[@noelsharpe]

Those noises are very annoying and add nothing.

[@utopiasnow]

Thank you for the feedback.

[@noelsharpe]

@@utopiasnow thank for for producing such interesting content! It’s always a happy surprise to see the very detailed and enlightening videos you post.

[@Pro2eus]

Really interesting flying and discussion. The editing and needless sound effects is distracting and rather spoils the video

[@utopiasnow]

Thanks for the feedback. Its always a balancing act. Looking at the analytics, the long selfie explanations loose alot of audience, based on the data so far the aggressive editing is helping keep people engaged. but I agree its jarring. One foot in front of the other and this engineer might figure something out. Thanks again.

[@Pro2eus]

@@utopiasnow I'm maybe an oddball preferring the drier content for technical stuff. To me it is interesting and stands well on its own. Anyway I'll keep watching them,. Merry Christmas!

[@DannyK426]

My dog is going to unsub if you ring the doorbell one more time.

[@utopiasnow]

My apologies!!

[@DannyK426]

@@utopiasnow lol keep up the awesome content!!

[@Digital-Dan]

Very nice videos about a pretty boring project. (To watch.) Clever 1 second "freewheelin'" clips not this grump's cup of tea. And the relationship of the random animal noises to the topics totally eludes him.

[@utopiasnow]

Thanks for the comment. I appreciate the feedback.