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Gee Bee QED

Will it fly?


  • Total voters
    8

Mr NCT

Elite member
#1
This is my first attempt at anything close to a Flite Test master series design so I picked a manufacturer and a plane that were notorious for spectacular crashes.
From Wikipedia:
"The Granville Gee Bee R-6 International Super Sportster, named "Q.E.D." (latin: quod erat demonstrandum "it is proven"), and later named "Conquistador del Cielo" (Spanish: "sky conqueror"), was the last in a series of racing and touring monoplane aircraft from the Granville Brothers. The R-6H was dogged with bad luck throughout its career and never finished any race it entered."

I'm shooting for a 40" wingspan C pack flier. Here's the Fusion 360 rendering:
52400115800_cc18c7363c_o (2).png

And now the build:
IMG_4113.JPG IMG_4114.JPG IMG_4115.JPG IMG_4116.JPG IMG_4118.JPG IMG_4129.JPG

I wasn't planning on the prototype being flyable but once it was together.... Why not?
IMG_4137.JPG IMG_4140.JPG

I'm expecting the QED to meet it's fate just like the real one. Looking at the plane from the front the tail is twisted slightly CW and the rear fuselage bows just a little to port. Will it fly? I'm expecting a spectacular crash!
Place your bets now before watching the video.

 

Attachments

Mr NCT

Elite member
#6
The cowl and canopy made no difference in the battery placement for the CG - balanced each other out.

IMG_4144.JPG

I have a friction fit on the cowl but it vibrated forward into the prop. Have to find a way to fix it in place without gluing. My biggest surprise is how well it flies - I haven't even had to adjust the trim settings.

 

luvmy40

Elite member
#7
The cowl and canopy made no difference in the battery placement for the CG - balanced each other out.

View attachment 231420

I have a friction fit on the cowl but it vibrated forward into the prop. Have to find a way to fix it in place without gluing. My biggest surprise is how well it flies - I haven't even had to adjust the trim settings.

Try coating the contact areas with rubber cement and letting it dry thoroughly before assembling.
 

Piotrsko

Master member
#14
The GB series were noted to be mildly unstable with aileron reversal and welded in place flying wires... Since no one lived to provide that data until Delmar Benjamin, they couldn't fix the problem.

Model planes operate in a totally different environment, so I am not suprised it flew well
 

Mr NCT

Elite member
#15
The GB series were noted to be mildly unstable with aileron reversal and welded in place flying wires... Since no one lived to provide that data until Delmar Benjamin, they couldn't fix the problem.
That's a common myth. Not trying to be argumentative (just factual), but....
Pilots who flew the Gee Bee R series (1, 2 & 6) & lived to fly again:
Jimmy Doolittle
Roy Minor
Lee Gehlbach
Wesley Smith
Royal Leonard
Lee Miles
George Armisted
Jacqueline Cochran
Francisco Sarabia - who flew it many times but died in the QED because a rag was sucked into the carburetor on takeoff
 
Last edited:
#19
That's a common myth. Not trying to be argumentative (just factual), but....
Pilots who flew the Gee Bee R series (1, 2 & 6) & lived to fly again:
Jimmy Doolittle
Roy Minor
Lee Gehlbach
Wesley Smith
Royal Leonard
Lee Miles
George Armisted
Jacqueline Cochran
Francisco Sarabia - who flew it many times but died in the QED because a rag was sucked into the carburetor on takeoff
I think what Mr NCT was getting at is that, specifically those who experienced aileron reversal/flutter in a GeeBee did not live to tell others about the reversal/flutter. I don't think he was saying that all GeeBee pilots died in the aircraft.