REFLECTOR: Exhaust systems

[Scott Derrick]

Tom,

You should take a look at the 3-into-1 by Custom Aircraft Parts. 
Pictures and drawings are on the web site.

I'd at lesat do some measuring before throwing in the towel.

Scott


Tom Martino wrote:
> My custom cowling was expensive and I would have to do way more than just a new exhaust.  The cowling would basically have to be custom made because I am using a non-standard engine for this airframe (IO-540 on a 173RG)
> 
> -----Original Message-----
> From: Scott Derrick [mailto:scott@tnstaafl.net]
> Sent: Friday, July 11, 2003 9:33 AM
> To: reflector@tvbf.org
> Subject: Re: REFLECTOR: Exhaust systems
> 
> 
> You can always use the forward facing exhaust system sold by the factory.
> 
> or:
> 
> Custom Arcraft Parts sells a cool 3-into-1 downward facing exhaust for 
> 6cyl velocity.
> 
> Both are burn proof for a big 6 with a 3 bladed prop on a pusher.
> 
> Scott
> 
> Tom Martino wrote:
> 
>>So, can the three bladed prop be mounted on an IO-540 to avoid burning?
>>(Sorry if I seem dense)  If so, how?
>>
>> 
>>
>>-----Original Message-----
>>From: Simon Aegerter [mailto:simon@aegerter.net] 
>>Sent: Friday, July 11, 2003 8:17 AM
>>To: reflector@tvbf.org
>>Subject: Re: REFLECTOR: Exhaust systems
>>
>>
>>
>>>After all, 3 does divide evenly into 6.
>>
>>
>>You are absolutely right, Dale.
>>
>>A 6-cylinder engine fires 6 times during 2 full turns, that is 720 
>>degrees. 720/6 = 120. That means, the blasts are seperated by 120 
>>deg. That happens to be the spacing of the blades of a 3-blade prop. 
>>So. with a 6 cyl. engine and a three bladed prop you can have the 
>>blast in one of two places: onto the blades or between them, 
>>depending on how you mount the prop. Presto!
>>
>>I have not flown a whole lot of hours since I turned my exhausts 
>>(3-in-1) backwards but I see no charring, just some soot.
>>
>>Somebody asked about a 4-bladed prop. Same argument, different 
>>result: a 4-cyl fires 4 times in two turns - so 180 deg apart. unless 
>>you have 8 ways to mount your prop, you are making sure that at least 
>>two blades are hit every two turns.
>>
>>Best
>>Simon
> 
> 
> 
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