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Old 10-21-2019, 04:39 PM
Northernliving Northernliving is offline
Join Date: May 2005
Location: Boston, MA
Posts: 374


Wow, that's simply amazing. Thanks for sharing. My only regret is that I didn't know you would be close to Boston - I would have rolled out the RV carpet for you.

Brian J.
Boston, MA
RV8 Based at ORH - Purchased
RV8 - The Project #83313 - Under Construction
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Old 10-22-2019, 02:26 AM
flyingRV flyingRV is offline
Join Date: Apr 2018
Location: Hamburg, Germany
Posts: 19
Default wow

Hermann, thank you so much.
You made my day, sitting in a hotel and waiting for the pickup, I enjoyed every second of the videos. Its simply breathtaking what you have experienced.
It would be a lifetime experience for me and I guess it was for you too.
Wondering myself if/when to start building and which aircraft...this is so motivating.

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Old 10-22-2019, 08:04 AM
GordonV GordonV is offline
Join Date: Jan 2019
Location: Annecy, France
Posts: 5

Hi Hermann,

Wow, what a great trip, great videos and great choice of music.
It is something I have contemplated, but I am not sure I have the balls.
After seeing this, the itch is starting again.
You mentioned you filled the wings with foam, could you elaborate on this. Type of foam, how you got it in there, temporary or permanent installation etc.

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Old 10-22-2019, 01:59 PM
SuperCubDriver SuperCubDriver is offline
Join Date: Feb 2011
Location: Germany
Posts: 434

The foam is called Plastazote LD24. It does not absorb water, is bendable and doesn´t break. It can be cut with a sharp knife, but best is a bandsaw, even a dull blade will cut it easily. Max recommended temperature range is 95 deg C or 203 F, so I assumed it´s good enough to park the airplane in the hot sun, at least with my reflective silver color on the plane. It does burn but slowly and is not really easy to get a fire started. Best it does not significantly expand when the pressure at altitude is decreasing.
I put in almost half a cubic meter which weighs 10 kg or 22 lbs. The weight of the foam is offset by the heavier salt water, that means I calculated the displacement as buoyancy - about 1060 lbs. I assumed that the airframe back to the trailing edge, the engine, prop and other equipment has another 300 lbs of buoyancy, so even when I lose one wingtip with 80 lbs of buoyancy while landing the airplane will float. Full tanks are good for another 90 lbs buoyancy, if they are emptied the things will get better.

I ordered 2 inch thick foam panels and cut out wing profiles like a wing rib. Cut them where the spar is, then cut them again lengthwise to be able to slide them in through the lightening holes in the wing ribs. The outermost layer I had to cut twice to get them in. It was partly just a trial fit and cut. Not all wing setions are filled as some are hard to reach.
The foam ist just laying in the wing sections, no glue or other fixation, just filled to get locked. Easy to pull out again.

I add some pictures so you will get the idea.
This is one layer behind the fuel tanks with a cutout for the wiring and aileron pushrod.
And inserted
RV-7 flying, IO-375 w. P-Mags, 200RV Prop

RV-8 flying, IO-375, P-Mags, 74RV Prop

Last edited by SuperCubDriver : 10-22-2019 at 02:06 PM.
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