Hourglass III Unlimited Class - First flying session!

[@neonuser456]

So incredible mind blowing how slow it is and able to fly so quietly

[@lr21643]

It's mind blowing at first, but after 5 minutes it's like watching the grass grow. Very impressive grass, mind you. I imagine it's a little more exciting if it's your own model, and you have to worry about steering, etc. Certainly I feel that way even about lesser models like EZB's, which I've actually flown.

[@spencer963]

You never cease to amaze me with your dedication to efficiency, another excellent build

[@ghost8050]

This is one of the most beautiful thing I have ever seen

[@andrecpu]

This is way more WOW than I thought!!!

[@KalijahAnderson]

That plane treats air like it's molasses. So slow and the prop turning that slow is amazing. It nearly feels like a lighter than air vehicle, almost.

[@itzmeandrei6190]

I will never understand this kind of planesss..and im so jealous because i like them so much, its no doubt it probably took over 4 days or maybe even more to make it flies so well it feels unreal. Good job

[@tylerloree5283]

Amazing I can't believe how slow the prop spins

[@donaldturner5124]

Incredible. Thanks for the video. I’m sitting here just stunned.

[@ben-jh5ln]

Simply amazing. Flight is beautiful

[@joshuawfinn]

Thanks! Check out the video in the description where we really got it going, and also the feature Nighthawk Gliders did on it!

[@IanCaine4728]

That is amazing! Fantastic job!

[@stevemcentyre1570]

brings back memories of Willow Grove NAS of 50+ years ago.

[@viniciusmadureira6638]

Simplesmente magnífico. Magnificent.

[@GrandadIsAnOldMan]

Fascinating :-)

[@crashrr2993]

Awesome! That is INSANE!!! Luv it.

[@bernardputersznit64]

went into reverse gear at the end - just wow

[@bigtoe160]

Wow! Nice, and great flight too!

[@joshuawfinn]

Thanks!

[@newskyflyersbhopal916]

Nice rubber powerd model.

[@martinlagrange8821]

Was holding my breath for the possible encounter with the Hangar Rat of Doom !

[@joshuawfinn]

Hahaha! A ministick took a ride in the rigging one time!

[@sidneydawe9937]

Indoor freeflight is so much fun and requires much more skill than predictable R/C flying which can get boring after a while. Try FF Peanut scale models whether powered by rubber os CO2 motors. This is such a delightful hobby but only calm conditions are suitable. No wind.

[@zawkay1466]

ရှေ့အတောင်ပံတွေ ပျော့ကျသွားလောက်အောင်အထိ အလေးချိန်လျှော့ချခဲ့တာကို ကြိုက်တယိဗျာ..အဆုံးထိ ကြိုးစားခဲ့တဲ့ဆရာကို လေးစားဂုဏ်ယူပါတယ်ဗျ။❤❤❤❤❤❤❤❤❤

[@Dr._Spamy]

How tough air could be ! :)

[@swastidesai6874]

Wow, That's Amazing

[@mikewhite4628]

Now, that is really beautiful..............................

[@NickSmith-hv9zi]

Josh, do you have a video or can you provide info on how are you anchoring the wing structure. What type of string are you using?

[@sirjacklee]

not slow motion?? Awesome..

[@Gioele_Zanelli]

How do you make the propeller go slow and strong enough?

[@joshuawfinn]

Build lots of planes, take notes and make each on better than the one before it, get advice from others, read and study the methods of experts, travel to as many flying meets as possible and push to do better each time while learning from others. Eventually you wake up one day and realize you're flying the stuff you wanted to fly. It's not easy. It's worth it.

[@Zinfirgal]

Мозг вынесен успешно (mindblowing)

[@jesseshepherd10]

Did you ever see All Rorbagh sic. He had one in the 60s that measured 60". Very tricky steer.

[@Vassle]

Amazing!

[@tux603]

Really amazing! What are the weight and wingspan of the model ? Is it not overmotorized, prop seems flare a lot ? Congratulations anyway.

[@joshuawfinn]

60" span, 3.3g, and I like props that do that. They actually seem to work really well when they sweep back like that.

[@marcelolicenziato]

mi mente quedo en pantalla azul, Wow, jamas imagine algo asi, increible y genial.

[@eliasfernandes6210]

Parabéns Joshua !!!

[@gabrielvicente3617]

br

[@pipacombate567]

@@gabrielvicente3617 💪💯👌✌

[@rafishaikh3598]

ART OF ENGINEERING. DEDICATION BEYOND MY IMAGINATION. Md RAFI MAINE USA-PHD

[@m.rsaifan9295]

It's like world record big plane 🤯🤯🤯

[@factdesignbr]

That is beautiful

[@tommyss834]

How do I make one

[@วาทสุขเงิน]

Wow cool!

[@zawkay1466]

တကယ်လေးစားတယ်ဆရာ..❤❤❤

[@MrCARLAN15]

Esta precioso como lo puedo adquirir

[@PixelPulse185]

Where is this in? is it in miramar Sandiego????

[@joshuawfinn]

St Luke's Presbyterian Church, Dunwoody, GA.

[@PixelPulse185]

@@joshuawfinn Oh ok, by the way do you know any classes for this hooby in san diego?

[@joshuawfinn]

@@PixelPulse185 yes I do. Search for San Diego Orbiteers. If you have any trouble getting in contact with them, shoot me a message through the jhaerospace.com website and I'll yank their chain a little.

[@PixelPulse185]

@@joshuawfinn Joshua thank you soo much! what age limit is class? And how do I get in?

[@joshuawfinn]

@@PixelPulse185 there are classes for all ages. Go on their website and look for contact information.

[@AngelLestat2]

There is some passive way to maintain the altitude?

[@joshuawfinn]

Positive pitch stability. Gotta have the CG forward of the center of lift, and enough negative incidence in the stab to compensate. Most aircraft are balanced that way and then pitch trim (negative incidence) is adjusted via tab on the elevator.

[@AngelLestat2]

@@joshuawfinn oh thanks.. cool!

[@kitgerhart8749]

Where is this?

[@joshuawfinn]

St Luke's Presbyterian Church, Dunwoody, GA. We haven't been able to fly there since the pandemic started even though all other activities there have resumed.

[@henryforster8101]

What balsa sizes did you use for spars? 1/16" tapering to 1/64"?

[@joshuawfinn]

.075x.050 inner, .025x.050 tips. No tapering

[@tux603]

And what are the weight and length of rubber ? With such a model you will break all records.

[@Indonesia01ian]

I really want to make my plane so slow like this one,,, my prop goes to fast, the plane looks very agresive and its not as relaxing as this plane,could you explaine me what is the main failure of amateur when I built one of these kind plane, how do i know the FAI rubber size, how much winding, how long the rubber n so on when I wind the rubber not to much in order to make slow revolution of propeller(my assumption to slowing my prop) the plane start shaking like it has no power thank you so much

[@joshuawfinn]

Rahadyan Muhammad, slow prop revs are a combination of a very light wingloading and a high pitched propeller. Also, to get a smooth running propeller, both blades must be at exactly the same helical twist and pitch angle. So you need to use a pitch calculator to do this. There are several articles on the topic in The Best of INAV over at indoornewsandviews.com. Set your pitch angle so the pitch is about 1.8 times the diameter, so 18" pitch for a 10" propeller. Then it's down to building light enough to need very little torque to turn the propeller fast enough for a good climb.

[@Indonesia01ian]

thank you so much for giving million dollar infomation sir,

[@jesseshepherd10]

Pitch and weight vs area

[@rangerboy93]

Plz upload a making video 🙏

[@peterpim3519]

Absolut klasse!!!

[@saito125]

Was that a Hangar Rat trying to shoot you down? And what's the carbon rod for? Very nice!

[@joshuawfinn]

Hahahaha! Yeah that is a thing... The rod is for steering it away from the walls. I was nudging the stab.

[@ede.2636]

Excelente... 😃

[@pipacombate567]

🥇👌💪👅🦇

[@Pesawatbambu]

Nice

[@NighthawkGliders]

Ok, Josh... Where’s the biggest and best place you going to fly this thing?

[@joshuawfinn]

Nighthawk Gliders, Lakehurst Hangar 1, June 16-17 and 23-24.

[@joshuawfinn]

Also, go to Rantoul if you can...don't remember when but it's like next week or something that's the Nats. Day 1 and 2, Dmytro will have his 44" there.

[@NighthawkGliders]

Nice! Bruce and I will be joining Nate and Abby Saylor at their RCS Fest on Father’s Day weekend. New Jersey is a bit far for us to travel but we should try to make it to the Indoor NATS this year! 😀

[@joshuawfinn]

Nighthawk Gliders ama website says 23-28 May. The last two days they have glider events. Y'all should enter. Your Sandpiper 18 would do at least respectably in Unlimited Catapult, and your 12" flapper would go well in Standard Catapult.

[@keithmccormick1272]

WOW

[@kmonnier]

Just the draft of that guy is enough to wreck your plan? Or stall it out?

[@joshuawfinn]

Stalled it out. The wreck was caused by an incorrectly secured bracing wire slipping under load.

[@pilotmiami1]

Браво

[@sonex413]

wow!

[@royrosales81]

This is absolutely incredible. Would you give me lessons and teach me how to build and fly one of these? I have only built simpler stick models before. I am an aircraft mechanic by trade, and am pretty good with following instructions, but the best is one on one instruction. I have also never seen one of these fly in person and would really like to. I am looking to open my own airplane hobby shop one day and would love any opportunity for input from experts in the hobby. I would be willing to fly out there if you could spare some time to teach me how to build and fly one of these ultra-lights.

[@robertbrunston5406]

Wow that was something! Thanks.

[@ghostyFPV]

you can play the video at 2x speed and it still looks like it's moving in slow motion

[@theGreaterAwareness]

That plane looks so light, I bet it could respond to a mouse fart.

[@joshuawfinn]

TheOriginalMakaaka oh yes. Everything disturbs it!

[@patrickradcliffe3837]

Needs a bigger venue.

[@Abderrahmane_Aitouche]

Joshua the king of slower fly ...... Un peu de l'anglais arabe .....

[@danemartin5288]

I thought it was slow motion until I realized everyone else was full speed

[@daniloangelieri3397]

eu gostei ddisso :]

[@danieltrujillo7983]

se pueden vender por que yo tew compro

[@anti-god343]

What in the Harry Potter world of flying candles is this

[@kf4293]

Fun to watch, but I *do not* have the patience, much less the skill, to build one. Just be'n honest.

[@joshuawfinn]

It's a lifestyle choice 😉

[@nguyendo4720]

???

[@nizaradam6697]

I dont need slowmotion camera.

[@davidlaing3046]

Kk

[@00haka31]

うわ～www

[@shakdidagalimal]

Boomer disrupts air currents and nearly destroys masterpiece yet remains totally clueless.