Inertia Rings... anybody making them again yet?

Neal@F14 · #1 08-07-2013, 09:20 AM

Does anyone know if anybody out there has taken up making the 11-12lb inertia rings like Mark Landoll used to make?

Seems like there is still a small market for such devices, for those who'd rather put the extra weight onto the flywheel instead of in the form of a heavy crush plate in front of a wood prop... also in the case of a ground adjustable composite prop, an inertia ring bolted to the flywheel is the only way you could add this kind of weight.

I've got a friend with a machine shop and was wondering if I should maybe ask him if he's interested in carving out a few of these rings.

EDIT: Well scratch the idea of my machine shop buddy making them for sale... he's not interested in making airplane parts for sale due to liability concerns. He'd make me a one-off ring for my own plane however, but I've already got a genuine Landoll 11lb ring. Would like to have a few more pounds though. Maybe I'll look into seeing if one thick enough to be 15-16 lbs could be made to fit, as I could still use a few more lbs weight up front. Oh well.

crabandy · #2 08-07-2013, 09:48 PM

Neal, I was thinking the same thing. I thought about having my uncle machine an inertia ring for me, I'm sure the liability kills the commercial part of it. I'm assuming I will need some weight up front, hopefully find out in a 1 1/2 months.
Perhaps you could and me some pics and dimensions of your ring.

southtarnation · #3 08-08-2013, 04:55 AM

Market it to airboats and include a statement that it should never be used on aircraft. You cannot control how someone misuses your lroduct after they buy it.

RijkersJ · #4 08-14-2013, 08:58 AM

[quote=Neal@F14;795393]Does anyone know if anybody out there has taken up making the 11-12lb inertia rings like Mark Landoll used to make?

Have been considering inertia ring for other reason then W&B: e.g. inertia specified for engine torsional vibration issues with a lighter then standard prop. I my particular case this is a composite prop on an IO360 angle valve with counterbalanced crankshaft.

Anybody that knows something sensible about this ??(no need to ask Lyc)

Btw: Rotax specifies moment of inertia ranges for their 912-914 engine range.