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1. 10:53 PM - Longerons Shaping (Dean Psiropoulos)
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| Subject: | Longerons Shaping |
--> RV7-List message posted by: "Dean Psiropoulos" <deanpsir@easystreet.com>
I clamped my longerons back to back with small "c clamps" and made a mark on
them every inch between where the side bend begins (in front) and ends (in
back). This was shown in a rough sketch in my RV-6 instructions. Then I
fastened my vice securely to the back of my fuselage jig (you RV-7/9/10 bums
don't get the pleasure of building one), which just happened to be above
knee height. Then I clamped the longeron assembly in the vise and pushed
down on both ends sticking out of the vice (more emphasis on the front
portion though). Because the vice was below waist level I could bring a LOT
of pressure to bear on the longerons. By pushing down on them then moving
the assembly up to the next inch mark, clamping, heaving, moving, clamping
and heaving on the longerons I gradually bent them into shape without
hitting them with a mallet. This did take a fair amount of grunt on my part
but the metal is amazingly malleable and with my set-up I could really lean
into it and use my body weight to give me lots of leverage. The plus side
was that both longerons were bent at the same time and ended up very close
to exactly the same shape.
BTW Dana Overall-have you actually painted your RV black yet? Back in the
good ole days, when I used to paint cars black, they had to have perfectly
STRAIGHT SHEET METAL or that color showed every imperfection, no matter how
small (not to mention the heat absorption and the fact that black shows
every speck of dust 5 seconds after you finish washing it). Have you
thought about having every rivet gun blow show through your beautiful black
paint job or are you planning on slathering your rivet lines with bondo
(only to have it crack off later)? Just FYI, even though a well done shiny
black paint job can be gorgeous, experience tells me NOT to paint large
portions of the airplane black.
Dean Psiropoulos
RV-6A, 24907
Drilling plexi oh boy!
Time: 11:17:26 AM PST US
From: "Dana Overall" <bo124rs@hotmail.com>
Subject: Re: RV7-List: Re:Longerons Shaping
--> RV7-List message posted by: "Dana Overall" <bo124rs@hotmail.com>
I guess I've got to agree with Dan C. and Dan H. in they both got it done
their own way. I leaned more to Dan C., just put the thing in a vise, twist
or pull the direction you want it to go and smack it. I did it with a
plastic camping mallet, no big deal at all. I used 3M-77 to glue the
template to a piece of cardboard and just bent a little until it fit the
template, installed it and twisted until it fit the firewall. I've got
agree, it ain't rocket science just smack it and move on..........it's not a
big deal:-)
Dana Overall
Richmond, KY i39
RV-7 slider, Imron black, "Black Magic"
Finish kit
13B Rotary. Hangar flying my Dynon.
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