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From: Jerry Hey <jerryhey@earthlink.net>
Subject: Re: [FlyRotary] Re: carbs vs efi
Date: Tue, 24 Jul 2007 22:21:00 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

Not my problem.  My opinion and that of the designer, is that more  
than 100 hp is not useful in this plane.  I don't agree at all that I  
need a  p port larger than 38mm to generate all the power I will ever  
be able to use. If I get the Hirth gear box, one of the gear ratios  
available will allow me to red line the p port at 7200 rpm.  Cruise  
will be around 6000 if I am trying to get somewhere and less if I am  
not.  If it jumps off the ground after a 100 foot take roll, I will  
be happy.  As Richard reminded me, it is more a matter of weight than  
hp.  Jerry


On Jul 24, 2007, at 9:40 PM, david mccandless wrote:

>
> On 25, Jul , at 8:27 AM, Jerry Hey wrote:
>> .  But it is hard (IMPOSSIBLE?) to build a single rotor p port  
>> with less than 100 hp.   Jerry
>
> Jerry
> are you not intending to fit a throttle? That is the horsepower  
> limiter!
> What is wrong with having some extra power with no extra weight?  
> When you operate from those high altitude lakes,
> you can have the same hp you have at sea level. In the old days  
> they had gated throttles for different altitudes and other reasons,
> like hot days etc.
> Fit the prop you want, spin it at the rpm you want ------that is  
> all there is to it
> I think you see a problem that does not exist,  TJ is right on the  
> money, build it --- just don't plan to use it :)
> BR, Dave McC
>
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