F704M Web stiffeners

[llarkin]

I just got done fabricating the F-704M web stiffeners. I was having a hard time determining whether or not the F-04A (forward center section) gets dimpled or countersunk to accept the rivets which hold the web stiffeners in place. Thank you in advance.

[Pirkka]

Originally Posted by llarkin

I was having a hard time determining whether or not the F-04A (forward center section) gets dimpled or countersunk to accept the rivets which hold the web stiffeners in place. Thank you in advance.

Google with word "F-704M" and you'll get:

http://www.rv7factory.com/log/070606.html
http://www.chadandbrittne.com/Februa...eb%2010-07.htm
http://www.rvproject.co.uk/Fuselage/..._deburring.htm

for example...

[llarkin]

Got it...Thanks!!

[tgmillso]

Hi Guys. Given that the flush rivets holding F-704M in place are to avoid conflict with F-782B Cover Support Rib once it is bolted in place, I really see that only one flush rivet is necessary, and that the top and bottom rivets could just be AN470. I just don't like countersinking for AD4 rivets on something only 40 thou thick if I don't have to.
Do you guys concur?
Cheers.
Tom.

[PH102]

The lower one also must be flush for the gear mount on 7A.