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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Two blade Ivo
Date: Sat, 15 Jul 2006 08:24:21 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>


Steve, last night I read a bit on exhaust systems. Yaw Power has some  
very good articles and everybody should read them: http:// 
www.yawpower.com/techindx.html
I'm trying to find stainless exhaust flange and will make a new  
straight out pipes. It will be nice to loose all the weight in the  
engine compartment. Now I have to cary lead on the nose for W&B.
Buly
On Jul 15, 2006, at 8:08 AM, Steve Brooks wrote:

> Buly,
> I know that the turbo is pretty restrictive, and you're right about  
> the
> casting.  I think that it weighs about 30 lbs, as I recall.
>
> The way you are doing it though, is faster, because you don't have  
> to modify
> your exhaust.
>
> There are some SS T04 manifolds available that could just be used  
> to replace
> the stock manifold, and bolt a muffler to it.  I have one for my T04
> conversion, if I end up going to it.  I may just do away with the  
> turbo,
> depending on how your tests go.  It would be nice to shed 30 lbs or  
> so back
> there, and not have to worry about the turbo failing, or getting  
> rid of the
> extra heat.
>
> Steve Brooks
> Cozy MKIV
> Turbo 13B - 42.8 hours
>
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of Bulent Aliev
> Sent: Friday, July 14, 2006 4:21 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Two blade Ivo
>
>
> I did some more static engine testing today. Mounted an electric leaf
> blower in front of my P-51 style scoop to force air in the radiator
> and oil cooler. Warmed up the engine to 125F and did the "auto tune
> magic". I'm not quite sure if i was doing it right, But the high-
> power test later gave me 5750 rpm static (2650 prop) That's 250 rpm
> more than last night before the tuning.
> During the test I had a visitor. The guy that rebuilt my engine came
> buy and said that my turbo-exhaust is very restrictive and I should
> go in to 2 in one pipes and get rid of the heavy turbo castings. Took
> me to his race 12-B that's set up for 9-10,000 rpm. It is across the
> street in a aircraft muffler shop and showed me his race manifold.
> Looks like there are couple of hundred rpm to be gained from the
> exhaust change?
> I remembered George Graham uses straight out flexible SS tubes
> without a muffler and his engine does not sound bad. Also it is 8
> feet behind me and points away from the cabin. this weekend may try
> to get it airborne again?
> Buly
>
> On Jul 13, 2006, at 9:28 PM, Bulent Aliev wrote:
>
>> Today I had a chance to test my 2 blade 68" diameter Ivo Magnum
>> electric prop at fine pitch about 50". With 3 blades I was getting
>> 4700 (2160 prop) rpm static (2.17 drive). Two blade gave me 5500
>> static. About 2500 at the prop.
>> For some reason today, at low rpm the engine was surging up and
>> down, but it was getting dark and I did not do any trouble shooting.
>> Bulent "Buly" Aliev
>> FXE Ft lauderdale, FL
>> http://tinyurl.com/s5xw8
>>
>>
>>
>>
>>
>>
>>
>> --
>> Homepage:  http://www.flyrotary.com/
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>
>
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