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Old 11-12-2019, 05:08 AM
Larry DeCamp's Avatar
Larry DeCamp Larry DeCamp is offline
Join Date: Apr 2010
Location: Clinton, Indiana
Posts: 972
Default Mounting tabs on close tolerance bolts

As suggested above for using spar doubler thru bolts, just replace existing washers with bent plates or tabs to accommodate the extinguisher. No change to existing structure to debate.
Larry DeCamp
RV-3B flying w/7:1 0320 / carb / Pmags / Catto 3b / digital steam
RV-4 fastback w/ Superior roller 360/AFP/G3X/CPI/Catto3b
Clinton, IN
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Old 11-12-2019, 12:51 PM
WingsOnWheels WingsOnWheels is offline
Join Date: Mar 2009
Location: Plano, TX
Posts: 2,030

Originally Posted by alpinelakespilot2000 View Post
Just attach the extinguisher to the front spar covers over the fuel lines using the screw holes going into the z brackets. (Assuming the 6 has those like the 7 and 9 do... apologies in advance if this is a misassumption.) That?s where mine is. Going into the spar itself seems like overkill to me.
The RV6 doesn't have that cover or any of those brackets.
Colin P.
RV-6A #20603
Complete 5/10/19
I donate every year on my B-Day (in Dec), but donated early in Sep'19.
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Old 11-12-2019, 02:12 PM
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PaulvS PaulvS is offline
Join Date: Aug 2019
Location: Western Australia
Posts: 258
Default Floor attach?

What about attaching the extinguisher to the floor, beside the spar/seat edge?
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, working on fuselage
Flying the aero club's RV-9A while I build
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Old 11-12-2019, 03:43 PM
JimWoo50 JimWoo50 is offline
Join Date: Oct 2005
Location: Chicago sw suburbs
Posts: 395
Default Pilot armrest

I have my small extinguisher mounted on the armrest. With a towel on it; kinda comfy and easier to reach than on the front of the spar.
Jim Woolard C56
N9855J RV-6 Donated 2019
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Old 11-12-2019, 04:40 PM
RV6_flyer's Avatar
RV6_flyer RV6_flyer is offline
Join Date: Jan 2005
Location: NC25
Posts: 3,456
Default PAX Seat Back Brace (F-638)

My Halon extinguisher bracket is mount on the passenger seat back brace (F-638) and is very easy to reach with or without a PAX. I did use some velcro to help hold it in place but it is very easy to pull away if it is ever needed.

Note: This was not my idea. I first saw it in Bill Flaherty's RV-6 twenty (20) some years ago. I thought it was a great idea and used it without permission.
Gary A. Sobek
NC25 RV-6
3,400+ hours
Where is N157GS
Building RV-8 S/N: 80012

To most people, the sky is the limit.
To those who love aviation, the sky is home.
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Old 11-13-2019, 01:15 AM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,488

Originally Posted by BobTurner View Post
That ‘thin web’ carries the shear load which, by connecting the upper and lower spar caps (think “I beam”) makes the assembly much harder to bend. My rule is to contact Vans before drilling any non-plan holes in any part of the spar assembly.
Actually guys, the vertical shear load is taken out very near to the side of the fuselage by the attachment bolts closest to the side, which go into the parts that make up the bulkhead; F-604, F-804, etc.

Once inboard of that point, there is NO shear in the spar, it is pure bending moment -- constant bending moment. (shear is the gradient of the bending moment).

So as much as we all are reluctant to cut holes 'willy-nilly' in the shear web in the center section area, it really is not doing much but keeping everything where it is supposed to be.
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
VAF donation Jan 2020
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