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{Reciever Problems. Help!} DTFB Stearman Scratch Build- Looks Great!

#1
So I have always been around the real Stearman because my grandfather restores and flies them. I decided to make the Stearman because I had a balsa wood kit lying around for a rubber band powered model. I took the plans to Staples and got them scaled up to a 40 inch wingspan and built it. The fuselage uses a box surrounded by formers and outer skin to make a beautiful (completely foam board) fuselage. The wings use a new wingtip technique to make more realistic wingtips, and inside the wing is a box spar. This version only has ailerons on the bottom wing, just like the original, but still has plenty of aileron control. The paint scheme on the plane matches my grandfathers stearman- even the numbers on the side. All my plans are hand drawn but if anyone knows how to make online plans I would love to post them for everyone to use!

Note- I will bring this to Flite Fest Ohio 2019- See ya there!

Flight- This thing flies on rails! It flies amazing in calm weather, but gets bumped around a lot in the wind due to the second wing.

Specs- Power Pack B or C recommended, 40 inch wingspan, 4-5 sheets of foam to build, 9x6 wood prop is my favorite prop.
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Jimun

Well-known member
#7
So I have always been around the real Stearman because my grandfather restores and flies them. I decided to make the Stearman because I had a balsa wood kit lying around for a rubber band powered model. I took the plans to Staples and got them scaled up to a 40 inch wingspan and built it. The fuselage uses a box surrounded by formers and outer skin to make a beautiful (completely foam board) fuselage. The wings use a new wingtip technique to make more realistic wingtips, and inside the wing is a box spar. This version only has ailerons on the bottom wing, just like the original, but still has plenty of aileron control. The paint scheme on the plane matches my grandfathers stearman- even the numbers on the side. All my plans are hand drawn but if anyone knows how to make online plans I would love to post them for everyone to use!

Note- I will bring this to Flite Fest Ohio 2019- See ya there!

Flight- This thing flies on rails! It flies amazing in calm weather, but gets bumped around a lot in the wind due to the second wing.

Specs- Power Pack B or C recommended, 40 inch wingspan, 4-5 sheets of foam to build, 9x6 wood prop is my favorite prop.
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Looks awesome - great job. Video soon or waiting till Flitefest?
 
#9
Sooooooooo... There's some problem between my transmitter and receiver (FrSky Taranis QX7S and the FrSky V8FRII) where there will be random disconnections (I guess it's a failsafe) for about 1 second where it holds the last known input and I have NO control! I was flying very low at a high speed and started a bank when it failsafed. The wing dipped into the ground and it cartwheeled. The wing where torn backwards but have since been repaired. The plane has some scars but will be flying again at Flite Fest Ohio 2019. If anybody knows what is happening please reply with a possible solution.
 

Merv

Well-known member
#10
Sooooooooo... There's some problem between my transmitter and receiver (FrSky Taranis QX7S and the FrSky V8FRII) where there will be random disconnections
I would take a very close look at the antenna(s) on the Rx. Remove the case and look at the outer braid where the coax enters the case. If it’s damaged you need to repair or replace that antenna
 
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FDS

Well-known member
#12
Also make sure your antennae are in two different geometric planes, away from any magnetic or motor interference and components that might block signal in certain orientations. I usually like one hanging out the bottom of the fuselage and one going up into the cockpit at 90 deg to each other.
Got to add my admiration for the quality of your build too.
 
#13
I did some research and it turns out that there is some kind of unpatched firmware glitch between the Taranis QX7s and the V8FRII that causes short failsafes. I am going to stock up on new, more compatible receivers at Flite Fest so that this glitch will stop. I will put a new reciever in the Stearman as soon as I can so that it can fly. Come say hi if you see it!

This is my stearman next to my grandfather’s stearman that he is restoring. (The real one) They are painted exactly the same B02584D3-F621-4713-B6EC-08A919EB5248.jpeg CA94D437-1318-43F4-8136-CB99B711B34E.jpeg 16227D34-7193-45FB-8B8D-02865B27215F.jpeg 5540DD2D-7E00-4FB3-8FD0-91B6205CC161.jpeg
 
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FastCrash45

Well-known member
#14
I did some research and it turns out that there is some kind of unpatched firmware glitch between the Taranis QX7s and the V8FRII that causes short failsafes. I am going to stock up on new, more compatible receivers at Flite Fest so that this glitch will stop. I will put a new reciever in the Stearman as soon as I can so that it can fly. Come say hi if you see it!

This is my stearman next to my grandfather’s stearman that he is restoring. (The real one) They are painted exactly the same View attachment 135292 View attachment 135293 View attachment 135294 View attachment 135295
Both are beautiful planes. Grandfather is doing an excellent restore! Always been one of my favorite planes.