Subject: [FlyRotary] Re: Lightweight rotary parts and engine mounts = (was Cooling f... The steel plates (lightened) are actually lighter than the sandwich = steel and aluminum plates PSport actually tried it.=20 Bill Jepson Bill , I wasn't aware of PS considered this concept and actually tried it , = I was half way through this process , some time ago, but when I machined = the wear plate out of a housing, I soon realized that there wasn't = enough weight savings to warrant the cost so didn't proceed. =20 George ( down under) ------=_NextPart_000_000F_01CAE380.B9A0C280 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Bill,

Yep The steel centre section is bulky - has to be, but it's = not overly=20 wide in the areas which take the mounting bolts of the stationary = gear.=20 That would concern me in aluminium as to me it would seem to lack = strength,=20 in the softer material. I can only assume those areas would = be reinforced=20 somehow in a aluminium housing

How do you get around the O ring area, just use thicker material in = the=20 wear service side or braze on a thickening plate in that area. The = through=20 bolt areas would be tubes with the channels tacked on before brazing I = assume.=20 Other areas would be supported with spacers where needed and the = through=20 bolt tubes and channels would also act as spacers.

How am I going am I near the mark with my assumptions. No need to = answer if=20 there is a commercial in confidence condition, just thinking out loud. I = find it=20 all very interesting and indeed exciting when thinking of the weigh=20 savings.

George ( down under)

George,
To=20 tell the truth I didn't know about that (trying the plates) either. = What=20 Richard has done is a fine piece of work. The fact is that the all = steel=20 brazed housing is lighter supprised me as well. The need to mount the=20 stationary gears is one of the things that also adds weight. BTW you = don't=20 even need to use chrome molly steel. Any decent low carbon will do. = Remember=20 you are only replacing cast iron.
Bill
Sent from my Verizon Wireless BlackBerry

From: "George Lendich" <lendich@aanet.com.au>

Date: Fri, 23 Apr 2010 08:19:30 +1000

To: Rotary motors in=20 aircraft<flyrotary@lancaironline.net>

Subject: [FlyRotary] Re: Lightweight rotary parts and = engine=20 mounts (was Cooling f...

The steel plates (lightened) are actually lighter than the = sandwich=20 steel and aluminum plates PSport actually tried it.

Bill Jepson

Bill ,

I wasn't aware of PS considered this concept and actually tried = it , I=20 was half way through this process , some time ago, but when I = machined the=20 wear plate out of a housing, I soon realized that there wasn't = enough weight=20 savings to warrant the cost so didn't proceed.

George ( down = under)

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