Thanks for this video, Scott. Nice to see you're flying again.
@rosiedb015 ай бұрын
Great video. With high CHTs, especially after maintenance, double check your ignition timing. Good idea getting the baffling buttoned up as well.
@CanardBoulevard4 ай бұрын
I thought that, but the problem exists even if I select just the mag or the electronic ignition, and the chances of the timing going bad on both at the same time is pretty remote.
@T.Watts894 ай бұрын
@@CanardBoulevardYes I agree
@rosiedb014 ай бұрын
Agree. It only takes a few degrees of advanced timing n to run the CHTs high. You can also check your engine data...you will see higher CHTs and lower EGTs with advanced timing.
@ITSFUNZ5 ай бұрын
All great stuff ! Seems like one can of worms just leads to another lol doing a great job sorting it out ! Thanks for the content 👍
@Stephen_Heathcote5 ай бұрын
Is the new prop dissimilar in pitch and size than the previous one? Different loading, thus thrust and rpm may be causing the temp to rise higher than previous. One simple test would be to put the original prop back on an try that? Johnston's baby oil may also help get the prop clean - it works with car exhausts :)
@CanardBoulevard5 ай бұрын
The distribution of thrust on this prop is different, but it is the same diameter as the old one, but yes, that is definitely a consideration.
@jimstrieby49984 ай бұрын
A really informative aviation video. Nice work!
@descendantofphineas77853 ай бұрын
What fun, my friend has built the EZE, COZY and he is working on his second EZE.
@bbtapb5 ай бұрын
Nice job on the go around!
@CanardBoulevard5 ай бұрын
I have no problem going around if things don't look right. :)
@tchuxley5 ай бұрын
Maybe the new prop is causing the cylinder temp issue?
@randalljames15 ай бұрын
black spots on prop are likely exhaust condensation... same you see coming out a car tailpipe
@stevedenton79865 ай бұрын
I've been really enjoying your vids! Simply LOVE the Cozy and Long EZ's. Keep doing what you love for as long as you can and God Bless my friend!
@terryhawkins23244 ай бұрын
I noticed something pertaining to your fox on the prop. When you were talking about the screw clamp being missing I noticed black what looked like exhaust on the bottom of the pipe that the clamp came from. It looks like spatter from the engine. Carbon or oil from maybe an issue with a cylinder. You may want to check that !!!! Better safe then an oh shit moment! Just saying
@CanardBoulevard4 ай бұрын
That's from when the oil breather outlet used to be on that side of the engine. I moved it to the other side now.
@Allan_aka_RocKITEman4 ай бұрын
@CanardBoulevard >>> Great video...👍
@watashiandroid83144 ай бұрын
Lol, I said "nice" when you landed and then a second later you said it the same way.
@jeffwidmann29575 ай бұрын
I have an idea Scott. Could you take a reversible shop vac.... And fabricating adapter to fit over the lower air intake where your diffuser is and in the hangar turn it on and have it blow air into the diffuser and go around to the engine compartment and see how the air is behaving as it blows up through the engine compartment? I figured that might be a way to view the aerodynamic behavior of the airflow without possibly having to fly the airplane who knows?.... Maybe it might reveal something. Just an idea
@CanardBoulevard4 ай бұрын
One better, I have a high-volume blower that I'm going to use to do this.
@bbtapb5 ай бұрын
Biggest impacts to cooling are timing and mixture not (within reason) airflow. Since the fuel nozzles bleed to outside air pressure, increasing air pressure at the bleed makes a leaner & hotter cylinder
@andremarais27064 ай бұрын
Thinking about your cooling issue. The blades on the new prop have little airfoil near the hub. May not produce enough suction power to cool.
@CanardBoulevard4 ай бұрын
It's possible. I'm actually talking with the prop manufacturer about this right now.
@jerryboyle924 ай бұрын
Could you switch to U-bolt style muffler clamps to replace the flimsy radiator screw clamps that can't take the heat/expansion of your exhaust pipes? Might save a prop.
@CanardBoulevard4 ай бұрын
Too heavy, and would damage the thin, delicate (and very expensive) stainless titanium alloy pipes. Those screw clamps are special stainless designed for this type of thing - I'm not sure why the one failed, as I never found it.
@josega63384 ай бұрын
Did you read: 'Des couacs chez les canards'? -Kwaks among ducks There is an english translation in the site 'Homebuilt Aircraft and kitplanes' Blessings +
@adamdobrzanski66315 ай бұрын
I thought in the previous video, it was said if the heat isn’t going into the cabin, then it’s being dumped on the engine….. could be the cause of the engine temp issues.
@CanardBoulevard5 ай бұрын
No, that is a very small amount of heat, and it gets dumped overboard, nowhere near the cylinder heads.
@Cavalier-lp8tr4 ай бұрын
First time viewer. Is it possible to fly the old prop agan? Those temperatures are not too hot.
@CanardBoulevard4 ай бұрын
It's in the plans, yes.
@davidhalloway30285 ай бұрын
Regarding the high CHTs, is there a way you can check that the indicated temperatures are correct?
@jimlove45414 ай бұрын
You might want to re-think the use of hose clamps in critical applications . With the vibrations generated by most aviation engines who are literally trying to shake them selves apart . No Mater what the band is made of they are not the proper way to clamp something of importance. Why is the exhaust stack so loose?
@CanardBoulevard4 ай бұрын
That is how these planes are built, and those clamps have been on this airplane exactly like this for 20 years. The exhaust headers are independent, each one goes to a slip joint on the header flange, so they need to be held together to AVOID vibration. They aren't CRITICAL, but without them you could end up with vibration-induced wear.
@jimlove45414 ай бұрын
@@CanardBoulevard I get that but doing cheap and easy 20 years ago doesn't make it any more correct. But I guess the repair to the new prop won't be that expensive so not to worry... love the plane.
@bigangelman4 ай бұрын
Auto Body clay to get those spots off prop
@CanardBoulevard4 ай бұрын
Good idea. I'll give that a try.
@jeffcj97734 ай бұрын
What field you flying from?
@CanardBoulevard4 ай бұрын
1G5 Medina
@KuschallRacing5 ай бұрын
from outside the velocity-canard - pusher seam to be the best plane concept and save because of his stol caracteristic...why this concept is the only one...so many new aircrafts on the market, now one builds this ruton concept ???
@glovester5 ай бұрын
Yo scott do you get nervous doing a test flight after a long break and maintenance like this? Whats the feeling like going down the runway after making all these repairs and getting the plane back up in the sky after months?
@stevefranseen19055 ай бұрын
Can't speak for Scott, but you have to be very confident that you have done everything needed for safe operation of the aircraft. At a certain point, you just need to buck up and go.
@CanardBoulevard5 ай бұрын
I spend a LOT of time making sure everything is perfect first. That's why I started with a ground run, inspection, then single pattern, inspection, before leaving the airport area.
@RAYROTHSTEIN664 ай бұрын
Air is dumb, you need to direct it to the cylinders, by no means will air want to flow thru the fins on the cylinders, unless you force it to go there. If one cylinder is hot, it could be excess friction, too hot a plug, or it's running lean from a vacuum leak.
@glovester5 ай бұрын
Wait is there a choke or something in there? You mentioned ‘leaning the mixture to not foul the plugs’.
@FlyMeAirplane5 ай бұрын
no, it's a fuel injected aircraft engine. The throttle body regulates the fuel air mixture. We use a mixture control to lean out the engine as we fly higher.
@mkepler58615 ай бұрын
doesn't the glare coming off the top of your instrument panel bother you? glare panels are usually black...
@CanardBoulevard5 ай бұрын
It's seen by the camera, but not by the pilot inside. I would make it black, but it is directly over the expensive avionics, and I would rather not cook the avionics with heat.
@musictheoryexcel75785 ай бұрын
Scott, You truly are a Perfectionist. You leave nothing to chance.
@CanardBoulevard5 ай бұрын
It is kind of a requirement in aviation.
@FlyMeAirplane5 ай бұрын
NACA duct, good idea. I had a 1" inlet, 3" long side and blew a ton of air. Do you have somewhere for the cabin air to get out? Stainless clamp, safety wire it? We have small loops welded to the exhaust pipes that have a stranded stainless wire attached to the engine. If the pipe breaks off it can't get to the prop. I'll be following your CHT saga as mine are doing the same thing on a Velocity and I've tried everything to fix it! I wonder if another plate on your diffuser could direct the airflow at the cys?
@alanm89325 ай бұрын
You're thinking there isn't enough cabin air outflow for the heated air to flow in? That's what I'm thinking. The engine is going to end up with 4 electric fans each controlled according to its own temperature measurement!
@ZPADEEDODAH5 ай бұрын
Thanks for the content, Scott... I very much enjoy watching your channel. I have wanted to own and fly a Long EZ since I was a kid. I got my private.. single engine land in th lat 80's, but only have time in Cessna 150, 152, and 172 aircraft. I never got too fly in any pusher aircraft at all... I am living vicariously through watching you fly the Cozy!!! Thanks again!
@jamesharkness10585 ай бұрын
Glad you are back in the air. You have worked very hard on your airplane!
@bradmottishaw4675 ай бұрын
If your cylinder head temperatures (CHT) are too high on those two cylinders, why do you continue to fly? Is it high, just not alarmingly high? Not trolling you, I really don't know and am curious. Thanks!
@CanardBoulevard5 ай бұрын
They are elevated during climb - I can mitigate it by pulling the power back after initial climb, and they are OK during cruise - not ideal, but definitely within a safe envelope. If they were high enough to cause damage, I would not be flying with it.
@bradmottishaw4675 ай бұрын
@@CanardBoulevard Thank you for taking the time to answer that question. I have been a fan of Canards for a long time, and appreciate your channel. Thanks again.
@BonBini135 ай бұрын
Awab brand hose clamps are much better clamps. They are used in the marine industry. They cost a bit more but worth every penny.
@jeffobrien18363 ай бұрын
Hey sir! I just bought a LongEz and plan to make many flights to the Sandusky area where family lives. I would be curious to speak with you since you appear to be from that area. Let me know how I can get in touch.
@stevefranseen19055 ай бұрын
Theory on your cooling: if I remember from your previous videos your cabin heat dumps (What could be cooling) air into the low pressure side of your baffling when in the off position and thus reducing the differential pressure below and above your cylinders. Consider sealing that off to collect data. I bet your cabin heat and cooling issues are intertwined.
@alanm89325 ай бұрын
As I remember it, the cabin air heat exchanger needs air to always pass through it. Otherwise the heat exchanger will get too hot for the material it's made from. So I guess the pipe that takes _unwanted_ heated air to the low pressure side of the cowel can't be blocked off, even for a quick circuit. On another issue, I'm thinking the poor hot air flow into the cabin is perhaps a lack of an air exit path from the cockpit.
@sawdustmaker494 ай бұрын
Did you figure out what the cooling problem is? Obviously not enough air, either restrictions on the inlet or outlet.
@ExtremeRecluse4 ай бұрын
Or have somebody fabricate a cowling made of heavy duty screen material
@orvjudd13835 ай бұрын
Put the old prop Back on and check CHT’s
@shinc40545 ай бұрын
Engine working harder to turn that new prop, compare previous speed to rpm, ?
@tn15095 ай бұрын
Great video! Make sure the hot air can get out
@raw4uraw4u64 ай бұрын
What a cool airplane, Nice video :) I am new to this with airplanes and aircraft. i will start my ppl training this fall. But one thing I have noticed when I look around here on youtube and all the flight videos is that the finish on the construction in the engine compartment looks like it would be built in kindergarten. cables hoses hanging here and there. crooked and twisted. Everything looks so amateurish. Junk buildings. even on factory-built pipes or cessnas, the same junk building. Do you not have greater requirements in aviation. This is what you have to get used to. Not that it scares me but I just wonder if it is this standard overall on small airplanes. :) Happy flying to all. see u in the air later on hopefully if i get my ppl :)
@CanardBoulevard4 ай бұрын
What you see is the results of 20 years of upgrades and changes. You could rip out everything, start over, and make it look nice and neat, but it's still going to work just the same.
@dominictrifiletti6304 ай бұрын
I would have someone while you do a 70% run-up for about 2mins, use a IR temperature reader, and confirm you gauge readings. It possible its NOT a correct reading, and the gauge needs to be calibrated.
@CanardBoulevard4 ай бұрын
The CHT's are K-type thermocouples, and they are all independent. The chances of all four of them going bad at once is pretty remote.
@fbi-information4 ай бұрын
Seems like a disaster in progress...
@WLange-pp1dk5 ай бұрын
A very exciting episode. May Elias be always with you!
@glovester5 ай бұрын
Yo, that hose clamp that went through the prop. I’m sure there’s a ton of heat on the exhaust pipe, especially right near that bend, if the clamp was very tight I can imagine it getting super hot and just letting go I suppose. I wonder if there are hose clamps specifically made for high heat scenarios.
@flysport_tedder4 ай бұрын
TIL "grazing mode" alternate title: "a series of baffling problems"
@JamesStoots4 ай бұрын
I didn't see it fly
@josega63384 ай бұрын
There is a NACA/ NASA document, available from Cranfield Repository, indicating NACA Air Intakes are not the best. Blessings +
@darrylwalker18675 ай бұрын
I power my cameras from a standalone power pack. I have found it to be a game changer. I found the GoPro to be sensitive to low amps (not surprisingly). I chose a power pack, problem solved. I can also get the cameras going early (before aircraft power on) and just forget about it.
@JimBronson4 ай бұрын
Check mixture cable? maybe running leaner than indicated?
@CanardBoulevard4 ай бұрын
I would know if that were the case because the EGTs would be off.
@johntenhave15 ай бұрын
A couple of observations if I may? Firstly if you want something air cooled cool, supply air directly to it. Secondly, imagine that cowl contents on the outside of your aircraft. Would that arrangement provide acceptable airflow outside the aircraft? If not you might want to ask why putting it inside a cowling would make any difference? The air paths inside that cowl are chaotic and indirect, to say the least.
@stephenwells395 ай бұрын
You definitely had two blast of white smoke on startup. Could that have caused the splatter on the prop? Good looking aircraft
@billwilliams95275 ай бұрын
Oh yeah, finally lovin the test flight, get the cylinders to cool down a bit, maybe some disappointment, but you'll figure it out.
@GrahamRiverProductio5 ай бұрын
Wow - that high pitch when you play at fast speed is kinda miserable. If you need help editing let me know.
@CanardBoulevard4 ай бұрын
Oh man, I usually mute that part of the video when I speed it up, I totally missed it. Sorry about that.
@GrahamRiverProductio4 ай бұрын
Not a problem! I typically listen to flying videos when I’m falling asleep so the high-pitched noise woke me up :-)
@Mtlmshr4 ай бұрын
I would put some type of safety wire on those hose clamps on your exhaust, just a suggestion?
@ExtremeRecluse4 ай бұрын
Are you allowed to fly with the engine cowling off?
@CanardBoulevard4 ай бұрын
Allowed - yes. But this would be extremely bad, as the engine would overheat and be destroyed almost immediately. It depends on the airflow being ducted into and forced through the cylinder fins in order to cool the engine. Without the cowling in place, that does not happen.
@Tenright774 ай бұрын
Try WD40 to remove the prop splatters...
@CanardBoulevard4 ай бұрын
Nope. Tried it. Also MEK, anhydrous alcohol and several types of cleaners. Nothing touches it.
@823Steve4 ай бұрын
You need to safety wire those clamps because they will loosen up.
@robertbandusky95654 ай бұрын
How about temperature sending units or guages ? 👨✈️Also, is OIL temperature normal
@CanardBoulevard4 ай бұрын
Oil and EGTs are normal. It would be very unusual to have all four sending units go bad at the same time, and the gauge is a digital G3X EIS, so not something that goes out of calibration.
@robertbandusky95654 ай бұрын
Do the four individual temp sending units feed to one digital unit or signal generator of some sort? Good luck😎
@robertbandusky95654 ай бұрын
Have you swapped the sending units from the two cylinders, and see what occurs under the same test conditions? I don’t know a lot about recips, having said that, a friend is chasing a similar issue on his Harmon Rocket. He also, is making cowl mods. Nothing has improved yet? I always think electrical 😎
@superbmediacontentcreator4 ай бұрын
Safety wire anyone?
@CanardBoulevard4 ай бұрын
Safety wire would not have helped that clamp from going through the prop, it still would have come off the exhaust and through. What I did do, where I moved it to, will prevent it in the future.
@ryanmcgowan30614 ай бұрын
A safety wire on the hose clamp would be a good idea.
@Flapswgm4 ай бұрын
The best way to to increase engine cooling is NOT to worry so much about the intake section, BUT look into the exit and make it an EXTRACTION rather than a FLOW. PULLING air is far more effective than FORCING air. Forcing air creates abnormal chamber pressures. Extracting air creates a LOW PRESSURE system and reduces the air temperature while it works. One way to do this is with a modified exhaust system that helps drive the air our of the engine compartment. Work on that.
@CanardBoulevard4 ай бұрын
I'm going to be testing for this shortly, doing a pressure delta test across the engine.
@banrircardot5 ай бұрын
Hard to get it up when the OAT is 46
@carlbeaver71125 ай бұрын
Not being able to see from here but wondering if there is any mounting between the two exhaust pipes. Heat & vibration would allow the distance between them to change and allow the clamp to loosen if there is no attachment to each other nearby. Also, I always avoid using worm clamps whenever possible because of their tendency to come loose, especially when not clamping something that has no resiliency (rubber, silicone, etc.) Also - temperature readings will change with supply voltage changes. Possibly your recent repairs to the electrical system created a change to your readings. I'd do a back-up / proof test by placing a sensor in a cup of heated water alongside a trusted mechanical thermometer. Maybe there is an adjustment/correction ability built-in to the system?
@CanardBoulevard4 ай бұрын
The worm clamps have been holding those exhaust pipes in place for >20 years now. I'm not sure what caused this one to decide that today was the day, but I've resolved the issue now anyway - if one comes off again, it will not be going through the prop. The temperature sensors are K-type thermocouples - they actually generate voltage depending on the temperature, so they are completely independent of, and unaffected by supply voltage.
@anthonyrstrawbridge4 ай бұрын
Remove the blast heat. Check intake leaks. Verify mechanical engine timing then ignition timing. Verify oil cooler and varistat. Did I see a zip tie on an intake tube? Your very calm👈🐱👍
@CanardBoulevard4 ай бұрын
I already pulled the blast tube from the heater shroud - no difference (except that the heat works just fine using the pressurized air from under the cowl, without the blast tube). I will be doing timing checks very shortly, oil cooler and variostat are good. You might have seen a GripLockTie on an intake tube to help hold it up out of the way of airflow.
@bbtapb5 ай бұрын
I doubt you’ll get any benefit from a new duct unless it’s a straight ram, because the issue is pressure difference front to back. Work at sealing up the nose, foam blocks can go on the elevator opening. A boot over the nose gear actuator. Once you don’t have the same pitot pressure up front, the heater will cook you out of the airplane
@CanardBoulevard4 ай бұрын
I have foam blocks in the elevator openings already, as well as around the gear actuator. It's still leaky...I'm going to replace them with neoprene socks adhered to the elevator tubes and the fuselage side to fully seal it off.
@vernscheck90895 ай бұрын
Isn't this the type of plane John Denver was killed in. Not for poor piloting skills but for poor placement of fuel tank switching lever.
@CanardBoulevard4 ай бұрын
kzbin.info/www/bejne/h2Kapq2LmpWVd80
@stevesomers73665 ай бұрын
After the work you've done along with the new air scoop, I can't help but feel that the exit pressure from the engine must be too high causing air stagnation. Is the exit area from the cowling greater than the air intake area?
@CanardBoulevard5 ай бұрын
I don't think so, but I'm going to be doing a differential pressure test just to be sure in any case.
@raywister51384 ай бұрын
Nice job! On the cowling!
@matthewgridley-pw2fj5 ай бұрын
I may be wrong, but the clamps on the exhaust look like regular hose clamps, not sure if they are rated for high temperatures. Normal high temp exhaust clamps are a T bolt style. Just a thought. Fly safe!!
@CanardBoulevard5 ай бұрын
They are stainless, just like the exhaust pipes themselves.
@andremarais27065 ай бұрын
Great progress great vid, Why do people Vocal Fry on VHF?
@CanardBoulevard5 ай бұрын
Yeah, they think it sounds cool or something. Drives me crazy.
@leeoldershaw9565 ай бұрын
I think 2200 static rpm full throttle at your elevation is too low. That's probably 6 inches of MP over square. Is the 0 360 rated for that? I know 0 320s were good for about 5.
@savannah655 ай бұрын
I can't wait to find out why the cylinders are so hot.
@helibob23675 ай бұрын
What is your fuel flow?
@michaelsamson32765 ай бұрын
Ty raps are cheap, use more on your engine wiring.
@ZPADEEDODAH5 ай бұрын
Tie wraps or "zip ties" as I call them would not be appropriate on an exhaust pipe assy. Plastic like that melts under really high temps ... what's ok for holding a wire bundle together inside the instrument panel, and cabin, is not ok in the high temp area of the engine bay.
@michaelsamson32765 ай бұрын
@@ZPADEEDODAH So you just let them hang loose?
@ZPADEEDODAH5 ай бұрын
@michaelsamson3276 No, of course, Scott needs an appropriate clamp for the temperatures as has been suggested by others above. I was just saying that "zip ties" are not appropriate in this specific location. Perhaps something made out of titanium to handle the high temps. I don't know a specific part number off the top of my head, but the decision on what to use lies with Scott since it's his aircraft.
@michaelsamson32765 ай бұрын
@@ZPADEEDODAH Actually the FAA guidelines are pretty clear. In areas the will be subjected to something like 450F, you need to use metal locknuts. Otherwise ty raps are just fine everywhere except within a couple of inches of the exhaust system All spark plug harnesses come with nylon ty raps for example. The only times they are damaged is when plug wires with ty raps on them rest on the cylinder head fins. High performance turbo engines cause ty raps to get brittle sooner if they are used in the exh system areas.
@CanardBoulevard4 ай бұрын
I actually use GripLockTies that Mike Patey created - they are high-strength, removeable, reusable zip ties that have a silicone surface on the inside that a) grip better, and b) won't cause wear or abrasion like standard nylon zip lock ties.
@thisperfectworld5 ай бұрын
Is that 15 seconds plus of cranking the starter to start normal? Is best practice to never allow an engine to not be run up to operating temp for more than a week if possible? That's a general rule of thumb in terms of automotive 4 cycle gas or diesel engines. Does a 3 blade prop's 50%ish more resistance make more work for the engine? I was very nervous after that 15+sec cranking to start. But I'm completely unfamiliar with piston aviation.
@FlyMeAirplane5 ай бұрын
Most aircraft engines sit for months between running. As do most boat engines! If you run an injected aircraft engine once a week then 2 seconds of cranking typically starts it. There is effectively no prop resistance at low rpm's.
@CanardBoulevard5 ай бұрын
The engine had not run in 4 months. Now that it is being run regularly again, it starts in a second or two.
@valleyken5 ай бұрын
- Cool. Some more debugging, but it seems to be flying pretty well. Smooth landing at the end.
@mikesatchell83175 ай бұрын
Weiman Ceramic and Glass Cooktop cleaner works good for cleaning props. 100LL would probably dissolve that stuff too.
@landlocked47715 ай бұрын
Just a thought about cooling but may be some where some how the air can't leave quick enough for proper flow. Love the videos and thank you for them.
@BruceRohde5 ай бұрын
Hi Scott, Enjoy your videos. Were you provided the plans for your Cozy when you purchased it? It looks like you are missing some of the baffling on your lower cowl as per the plans although it's hard to see in the video. It also looks like as per the plans you are missing your interior cylinder baffles that butt up against the engine case. Might help with the cooling.
@johntoncinich11765 ай бұрын
for the splatter, try olive oil to remove it (i know, but it may work)
@DeanLewis-l9o5 ай бұрын
Is there a Cozy Owner’s Club that you belong to? These types of clubs are great for brainstorming with when faced with such problems as overheating cylinders and cabin heating issues.