I agree with both of you. Jim N87349 -----Original Message----- From: Larry <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Cc: [EMAIL PROTECTED] <[EMAIL PROTECTED]>; [email protected] <[email protected]> Date: Thursday, December 30, 1999 5:30 PM Subject: Re: [COUPERS] Take off / landing performance
>OK! I vote with James. There, John, it's two to one. You lose. I do agree with >John on one item. If you cannot feed enough fuel to get the desired HP, but you >have a prop that allows the engine to over rev, you will get higher rpm without the >extra HP. > >Larry > >"James W. Duffy" wrote: > >> OK, girls, let me put my two cents worth in. I changed the venturi and the >> jet in my carbuerator to the C-85 size and got the increased RPM >> without changing props. Horse power and RPM are related, no increase in rpm >> no increase in horse power. Jim N87349 >> -----Original Message----- >> From: John Cooper <[EMAIL PROTECTED]> >> To: [email protected] <[email protected]> >> Date: Wednesday, December 29, 1999 11:22 AM >> Subject: Re: [COUPERS] Take off / landing performance >> >> In a message dated 99-12-29 10:18:32 EST, you write: >> >> > As you know, the only >> > significance between the 75 and the 85 is the RPM. The prop is what >> gives >> > you the >> > extra revs. I would think that going down to a 46 would mean you really >> > have to watch >> The C-75 has a smaller carburator throat. That is the ONLY physical >> difference and the 75 simply can't breath well enough to make 85 hp, no >> matter how high you get it to rev. (finer pitch results in lower prop >> loading so your higher revs are at reduced manifold pressure, hence lower >> power.) Continental approved conversion to 85 HP: change carb. >> >> Many C-85 installations call for the 7148 as the standard prop. 46 is climb >> and 50 is cruise. >> >> John >> >> __________________________________________________________________________ __ >> ____ >> To unsubscribe from this list please send mail to >> [EMAIL PROTECTED] >> >> _____________________________________________________________ >> Get your favorite topic delivered daily. >> http://www.topica.com/t/11 >> >> __________________________________________________________________________ __ ____ >> To unsubscribe from this list please send mail to [EMAIL PROTECTED] >> >> _____________________________________________________________ >> Get your favorite topic delivered daily. >> http://www.topica.com/t/11 > __________________________________________________________________________ ______ To unsubscribe from this list please send mail to [EMAIL PROTECTED] _____________________________________________________________ Get your favorite topic delivered daily. http://www.topica.com/t/11
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