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, but I should be thanking you for giving me something else to think about while I'm stranded in the great white = north. I'll even imagine aluminum housings to lower the weight further :-) =20 Lynn mentioned oversquare operation, and we've all been taught not to = "lug" engines. Would 3500-4000 be lugging, or is it high enough to consider normal WOT operation? Would this sort of operation carbon up the = engines, or would they stay clean? Would EGT's stay at a more reasonable temp?=20 =20 I bet Lynn has an opinion on this :-) =20 Cheers, Rusty=20 =20 =20 ------=_NextPart_000_0028_01C8827F.5809BDB0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Thrust bearing is a real consideration but not = a show=20 stopper. I'm thinking along the lines of a 3rd gen or Renesis = thrust=20 bearing (larger than the 2nd gen part) and bolting the prop with a = short=20 extension directly to the counterweight. The rotary's crankshaft = is about=20 the only one I would consider doing this with. This would = still mean=20 changing the thrust bearing every 500 hours or so.

Hi=20 Tracy,

OK, you have=20 my attention now :-) I was afraid = to imagine bolting a=20 prop right on the counterweight like that, but since you brought it up, = it's=20 fair game to talk about :-)

We=20 know the rotary has a bulldog of a shaft, and it sure "seems" = like it=20 should be strong enough, but would it really survive prop loads? = The=20 thrust bearings could possibly be upgraded, but they're easy to replace, = and so=20 is the rear main bearing. Could these just be replaced = periodically,=20 or would they need to be upgraded?

The real problem is that there are very few airplanes that fit this = configuration. The RV-3 is one of them and that's what got me=20 started.

I'll get you=20 for this <g>, but I should be thanking you for giving me = something else to think about while I'm stranded in the great=20 white north. I'll even imagine aluminum housings to = lower the=20 weight further :-)

Lynn=20 mentioned oversquare operation, and we've all been taught not to "lug"=20 engines. Would 3500-4000 be lugging, or is it high enough to = consider=20 normal WOT operation? Would this sort of operation carbon up the = engines,=20 or would they stay clean? Would EGT's stay at a more reasonable=20 temp?

I bet Lynn has an opinion on this=20 :-)

Cheers,

Rusty

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