Mailing List flyrotary@lancaironline.net Message #51838
From: Dwayne Parkinson <dwayneparkinson@yahoo.com>
Subject: Re: [FlyRotary] Re: Bad rotary week
Date: Tue, 3 Aug 2010 13:15:29 -0700 (PDT)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks for the info everyone.  I'll have to reconsider the 20B.  


From: Tracy Crook <tracy@rotaryaviation.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, August 2, 2010 8:29:31 PM
Subject: [FlyRotary] Re: Bad rotary week

Hi Dwayne,
   I estimate I'm getting about 200 HP at 7200 rpm on the Renesis.  230 is probably the best you are likely to get when normally aspirated and then you will need to turn it a bit faster.  I went all out for weight reduction on my RV-4 so the engine & systems came out around 260 lbs.

OTOH, I'm getting about 270 effortless HP from the 20B at 6250 rpm.  Should get 300 if turned to 7000.   This install weighs about 90 pounds more than the Renesis though.

Tracy

On Mon, Aug 2, 2010 at 7:32 PM, Dwayne Parkinson <dwayneparkinson@yahoo.com> wrote:
Bobby / Tracy -  Do either of you know what HP your Renesis is generating?  I'm very curious about the supercharged Renesis.  If you know the installed weight that would be great info too?  

George - I'm building a Bearhawk on floats and would like 250+ HP.  

Anyone who cares - I currently fly a Stinson 108-1 behind a Franklin 150 so I'm painfully aware of how hard it is to come by parts for unique engines.  That makes the 20B much less appealing as an option for me.  That being said, I watched from the Sea Plane Base at Oshkosh as an Aeronca Sedan with 145 HP lumbered across Lake Winnebago trying to get off the water.  People actually cheered when he finally broke a float free.  I think he was in Appleton's airspace by the time he got into air (no, I'm not kidding either).  That type of performance just won't cut it so anything less than 230 HP is not an option for me either.

Thanks very much.

Dwayne




From: Bobby J. Hughes <bhughes@qnsi.net>

To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Mon, August 2, 2010 6:33:36 PM

Subject: [FlyRotary] Re: Bad rotary week

Dwayne,
 
My super charged renesis uses 1 oz per gallon of 2 stroke oil. So it's very likely David is using 1 quart every 5 hours. Question is 2-stroke or sump? No indication I am using any sump oil. But I only have about 35 flight hours. I do have a small internal coolant leak and need to replace an o-ring when my fiberglass work is finished. I would choose the renesis side port exhaust over a peripheral port exhaust any day for our application.
 
Bobby Hughes


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dwayne Parkinson
Sent: Monday, August 02, 2010 4:43 PM

To: Rotary motors in aircraft
Subject: [FlyRotary] Bad rotary week

For anyone hoping that a 16X would show up any time soon:  not ... gonna ... happen.  No RX7 and the RX8 is still powered by the Renesis for 2011.


As if that's not bad enough, when I was at Oshkosh I took in David Atkins rotary seminar.  I came away pretty depressed thinking that I probably won't put a rotary engine in my airplane.  Is everyone else really using 1 quart of oil every 5 hours?  He also didn't have much good to say about the Renesis in an aviation application which leads me to conclude that the 16X will fare even worse in aviation applications as it is tweaked to meet higher EPA requirements and produce more low end torque.

Is anyone but Tracy using a Renesis?  I'd really like to know what HP you're getting, what the fuel burn is and how it's holding up.

Thanks,

Dwayne

P.S.  I couldn't find any rotary planes on the field at Oshkosh.  Perhaps they sank into the mud.








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