flyrotary@lancaironline.net Mailing List Archive

Now that's an interesting data point that I either didn't know about or forgot.

Tracy, do you recall the formula you used to calculate runner length? All the sites I've seen (including PL's stuff) seem to use typical calcs for 4 stroke piston engines, which doesn't make sense to me. Piston engines fire every other rev, but the rotary fires every rev. Did you use the 'standard' calcs and assume that you were getting a higher multiple reflection, or did you use rotary-specific calcs? Or, just copy the stock Renesis manifold's runner length for your desired rpm?

Charlie

On Tue, Jun 14, 2016 at 2:17 PM, Tracy <flyrotary@lancaironline.net> wrote:

Right Charlie, those were the short runners used for the SUN 100 race. You could feel the engine come 'on the pipe' around 7400 Rpm which is where I ran it for the race. All other times I use the longer pipes with a lower peak HP rpm.

Tracy

Sent from my iPad

> On Jun 14, 2016, at 10:26, Charlie England <flyrotary@lancaironline.net> wrote:
>
>> On 6/14/2016 9:52 AM, Tom Mann wrote:
>> Any Idea as to where one might find this information?
>>
>> -----Original Message----- From: Charlie England
>> Sent: Tuesday, June 14, 2016 9:43 AM
>> To: Rotary motors in aircraft
>> Subject: [FlyRotary] Re: Mistral
>>
>> It's not that hard to make an intake that will make great power. Look at
>> Tracy's setup. Might not be aesthetically beautiful to some eyes, but to
>> me, function is beauty. I don't know of any N/A 2 rotor that's as fast
>> as his -4, or as efficient at lower speeds. And really simple to make.
>>
>> Charlie
>
> Hope Tracy doesn't mind; here's a shot of the Renesis manifold. I believe that the tubes inside the 'box' were later extended to be near the opposite wall. IIRC, Tracy said that the tubes are ~11" from the face of the block to the end of the bellmouth.
>
> You can see old versions of the RWS website by using the Wayback Machine & picking a date.
>
> Charlie