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Wingtips for Craig (Read 11149 times)

Sky9pilot Administrator Offline Stick & Tissue Posts: 13264 Location: Kelso, WA 98626 USA Joined: Jan 9^th, 2010	Re: Wingtips for Craig Reply #35 - Jul 29^th, 2018 at 9:46pm	Print Post
	Great progress! She looks great in the air. Especially that close pass on the second or third flight!!!

	If God is your Co-pilot...switch seats... Your attitude will determine your altitude!- John Maxwell And ye shall know the truth, and the truth shall set you free. Jn 8:32
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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #34 - Jul 29^th, 2018 at 7:18pm	Print Post
	First trimming session on the T-28 was a nightmare - very erratic behavior in the pitch axis, ended up landing hard, popping out the wing and buckling a few stringers aft of the wing joint. Post-mortem revealed that the stab was at a more positive angle than the wing - no wonder it didn't fly the same way twice. More carefully measuring wing and stab areas, then re-calculating tail volume and cg showed my initial cg was too far aft. Set the stab up 1 degree negative WRT the wing and moved the cg about 1/8" forward and took it out this morning to try again. Things went much better: https://www.youtube.com/watch?v=vnQ5gQXj7wI&t=2s Cg could probably stand to go just a bit more forward, but it's looking very nice in the air. Cheers, Mike

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Sky9pilot Administrator Offline Stick & Tissue Posts: 13264 Location: Kelso, WA 98626 USA Joined: Jan 9^th, 2010	Re: Wingtips for Craig Reply #33 - Jul 26^th, 2018 at 6:42pm	Print Post
	Wonderful Mike...you've got a flyer on your hands!!!

	If God is your Co-pilot...switch seats... Your attitude will determine your altitude!- John Maxwell And ye shall know the truth, and the truth shall set you free. Jn 8:32
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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #32 - Jul 25^th, 2018 at 2:41pm	Print Post
	Thanks Phillip! Did some initial trim glides without the prop this morning - looks promising: https://www.youtube.com/watch?v=xvHjDEP-BXY&feature=youtu.be Hope to put it up under power tomorrow morning. Cheers, Mike


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Meatbomber New Member Offline Posts: 20 Location: Klatovy, CZ Joined: Dec 19^th, 2017	Re: Wingtips for Craig Reply #31 - Jul 25^th, 2018 at 1:33pm	Print Post
	Got to say it again Mike that has to be one-off the best pure tissue finish I’ve ever seen! Thanks for sharing some of your techniques in this thread! Cheers Phillip


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Sky9pilot Administrator Offline Stick & Tissue Posts: 13264 Location: Kelso, WA 98626 USA Joined: Jan 9^th, 2010	Re: Wingtips for Craig Reply #30 - Jul 23^rd, 2018 at 5:54pm	Print Post
	Mike...that's what I thought...but didn't want to ruin anyone else's search! That is such a masterpiece, I'm with the other fellas in saying I'd be afraid to give her a chuck into the air!!! Yet, that's what we build em for isn't it?!

	If God is your Co-pilot...switch seats... Your attitude will determine your altitude!- John Maxwell And ye shall know the truth, and the truth shall set you free. Jn 8:32
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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #29 - Jul 23^rd, 2018 at 12:23pm	Print Post
	Thanks Pete - it's a T-28A with the smaller 7-cylinder engine and the taller canopy. I put some nicer pictures and a bit of background on the color scheme in my hangar this morning. Hope to give it a toss or two Thursday morning (it's calm today but it's also rapidly heating to a record-breaking 105 degrees today - supposed to be somewhat cooler Thursday morning). Cheers, Mike


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staubkorb 5 Star Member Offline Stick & Tissue Posts: 1428 Location: Germany Joined: Oct 22^nd, 2008	Re: Wingtips for Craig Reply #28 - Jul 23^rd, 2018 at 11:12am	Print Post
	That is really one SHARP T-28(B?)! I'd be afraid to even try to fly it !

	WWWoFF Wonderful Wacky World of Free Flight (with a bit of rc thrown in for giggles) Comparing Spammers to a pile of organic waste is an insult to the organic waste!
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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #27 - Jul 23^rd, 2018 at 10:34am	Print Post
	Tom, I swapped sides when putting on the silver tissue for the main gear on the fuselage. The inner doors should taper in towards the front. Like you said, I don't think most folks will notice... Cheers, Mike


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Sky9pilot Administrator Offline Stick & Tissue Posts: 13264 Location: Kelso, WA 98626 USA Joined: Jan 9^th, 2010	Re: Wingtips for Craig Reply #26 - Jul 23^rd, 2018 at 9:48am	Print Post
	Mike...if we have to look this hard to find them...I think you're in good shape! Unless they're staring at a three view and looking at the model I don't think they'll notice! Tom

	If God is your Co-pilot...switch seats... Your attitude will determine your altitude!- John Maxwell And ye shall know the truth, and the truth shall set you free. Jn 8:32
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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #25 - Jul 22^nd, 2018 at 8:59pm	Print Post
	Lost the tail picture somehow - here it is:

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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #24 - Jul 22^nd, 2018 at 8:55pm	Print Post
	Doped it last night, added the pitot tube, colored the lights and dressed up the prop today. Pretty much done with building on this one - only thing left to do is finish the freewheeler and put on the prop. WX looks promising to fly on Wednesday or Thursday this coming week. Mike

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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #23 - Jul 22^nd, 2018 at 7:55am	Print Post
	Thanks Craig! Bonus points to the first person to identify the items I screwed up and put on backwards. Mike


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Craig 3 5 Star Member Offline I Love YaBB 2.5 AE! Posts: 1003 Location: West Virginia, USA Joined: Apr 8^th, 2017	Re: Wingtips for Craig Reply #22 - Jul 21^st, 2018 at 6:28pm	Print Post
	Wowza. That is absolutely beautiful, Mike! You take it up a notch every single time!


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MKelly 5 Star Member Offline Posts: 1325 Location: Helotes, TX Joined: Apr 11^th, 2017	Re: Wingtips for Craig Reply #21 - Jul 21^st, 2018 at 6:22pm	Print Post
	Alright, I might have gone over the edge with this build. Spent an enjoyable afternoon catching up on the British Grand Prix and putting anti-static wicks, rudder trim tab actuator, flap hinges, landing and position lights on the T-28. Another coat of thinned dope to seal down all the gingerbread, assemble the prop and color the lights and this one will be ready to fly. Right now with prop and noseblock (and 1.7g of tail weight) the model weighs 53.2g balanced. 24" span and about 93 sq in wing area - a little portly but not too bad. Cheers, Mike

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