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Old 03-09-2023, 11:10 AM
rag rag is offline
Join Date: Feb 2012
Location: Holmen, WI
Posts: 67

Thank You David Paule for the "stretchy rope" explanation. It seems to me that all these airport tie downs are designed around a tailwheel airplane. There should be a tie down point for the nose wheel on a tricycle airplane. If one looks at the position of the wing tie down points and the gear as a pivot point on many tricycle airplanes, the angle of attack of the wings can change relatively easy is a strong wind. I think we would lose far fewer airplanes to winds if a complete redesign of tie down locations on airplanes and airports be considered. (Not going to happen-I know) ....
Rick George
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Old 03-09-2023, 01:14 PM
David Paule David Paule is offline
Join Date: Dec 2009
Location: Boulder, CO
Posts: 5,632

Another tip that only works if you know the wind direction in advance and the direction stays constant, which is often the case here, is to position the place so the wind doesn't hit it head-on but at an angle. You don't want the wind to come from the rear at all, though. The idea here is to reduce the lift on the wings.

And double-rope the upwind wing.

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Old 03-09-2023, 08:08 PM
thinkn9a thinkn9a is offline
Join Date: Nov 2007
Location: Mississippi
Posts: 337
Default 10% vs 1% stretch at 20% of breaking load

That is roughly what stretch is for 3 strand nylon vs a high performance line like dyneema. (And roughly 30% stretch for nylon at breaking point)

Add that to difficulty in getting larger nylon line tight,….and planes can start bouncing around.

Flip side is that if you fail to get a high performance line tight,…. There will be a real “jerk” (loading spike) when it is pulled tight with movement
Wallace & Marietta Goodloe
9A -QB
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Old 03-09-2023, 08:18 PM
moosepileit moosepileit is offline
Join Date: Dec 2010
Location: Louisville, KY
Posts: 869
Default Chocks

Even very lightweight chocks, low enough for wheelpants, are just as key as rope and knots and control locks to weather a storm.
RV-6, bought from builder.
O-320, slider, carb, mags, FP
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