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-   -   OK to Hang Engine on 7A without wings? (https://vansairforce.net/community/showthread.php?t=185573)

pereeder 08-07-2020 06:14 PM

OK to Hang Engine on 7A without wings?
 
Hello All-

I'm finally at the point of buying the power plant & prop. Wingless 7A fuselage in a single car garage, no wheels at all. Wings previously fitted.

Question: Is it OK to mount the mains and nose gear without the wings installed, then hang the engine? I'm concerned about damage to the main spar center section, without the wing spars in place.

I was thinking of making some precision spacers in place of the wing spars, then running the large wing bolts (hardware store) through the spacers to temporarily secure the main gear.

Thanks,
Paul Reeder
-7A, Central Ohio

RV7 To Go 08-07-2020 06:50 PM

I used 4 spacers (top and bottom at each end in the 1/4" holes just ahead of the main bolts) to maintain position of the main spar. Engine was hung and FWF stuff done before taking it to the hangar to plug in the wings in. Loosened the spacer bolts and plugged in the wings. No issues experienced.

wirejock 08-07-2020 06:53 PM

Spacers
 
Good point. Almost there myself. I will bolt the Buller Spacers back in place before hanging the engjne.

scottmillhouse 08-07-2020 06:53 PM

I don't know of anyone that did not do landing gear and hang engine before final wing installation. Just don't try to start without wings. Plane needs them for damping otherwise it could shakes like a wet dog as Vans tells it and cause damage to the structure.

Hitt7A 08-07-2020 07:23 PM

I installed mine no spacers and didn’t have any issues, put the wings on later and everything lined up good. I agree I wouldn’t start it up without the wings on.

pereeder 08-08-2020 07:43 AM

Thanks Guys, particularly the "Wet Dog" advice. LOL. That I did not consider

-Paul Reeder
RV-7A, Central Ohio
90% done, 50% to go...

Ralph Inkster 08-08-2020 10:01 AM

If you don't have the empennage attached, throw some weight on back there.

& I definitely agree with others about the no start with wings off rule. There's a YouTube video (from our airfield) of a turbine 4P skipping across the ramp on it's side... expensive mistake!

Aero_Octaveus 08-08-2020 10:51 AM

No gonna sugar coat it. I kinda want to see that clip

Robertc 08-08-2020 11:30 AM

I think this is it.

http://m.youtube.com/watch?v=EHt6nYTdmRQ

Ralph Inkster 08-08-2020 11:33 AM

Yeh, wasn't a good day for them.


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