flyrotary@lancaironline.net Mailing List Archive

George,

Hope to get it all together in this lifetime as my project efforts are still

slowed to a snails pace by my care-giving dutys to my 89 year old mother......

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

From: George Lendich <lendich@aanet.com.au>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Wed, August 18, 2010 4:03:09 PM
Subject: [FlyRotary] Re: Turbo Questions

Kelly,

Let us all know how well it goes for you in the real world application. I can't help but feel we are trying to fit a square peg in a round hole with Turbo application to Aviation needs.

Personally for myself, as I have stated before, I feel that I would use remote mounted turbo, like some cars use (to reduce the heat and flow speed to the turbo) and feed it from a bypass off the exhaust pipe. The by-pass could be controlled manually, for (when required) application. A wastegate does the same thing but the exhaust is taken right up to the turbo and carries the heat with it. I think this would go a long way in controlling heat and over spinning issues.

However you need the necessary room to make this possible.

George (down under)

Bob, John and All,

     Well I have bit the bullet and made my decision for a turbo............After much research, talking to Bob

and John and conferring with a "Turbonetics" dealer I have ordered a TO4E-50 trim (compressor wheel),

wet bearing housing, big shaft "Q" trim (F1-68mm) turbine wheel and 1.15 a/r ratio turbine housing.........

     The decision what size turbine wheel and a/r ratio housing was based on the fact that the f1-68mm

turbine and 1.15 a/r housing causes less exhaust back pressure than the smaller wheel (bigger hole) and

will increase rpm less as you increase altitude as opposed to the F1-65mm wheel plus the 1.15 a/r ratio

housing will slow rpm increase for the same reason............

    The decision to go with the 50 trim compressor wheel (Like John) verses the 60-1 wheel (Like Bob) was

based the "Flow Maps" of both wheels and my uneducated opinion that the 50 trim wheel would be running

in a more efficient area of the flow map base on the "Air Consumption Chart" (lbs per min) of the 1.3L 13B

that I submitted to the group in a previous post.............Of course for all practical purposes there is probably

little discernible difference between any of these turbo configurations mentioned.............

   At least I have livened up the forum for a while !!............FWIW..................<:)

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold