REFLECTOR: Take-off rpm

[cgputney at peoplepc.com]

Thanks Steve!
----- Original Message ----- 
From: "steve korney" <s_korney at hotmail.com>
To: <reflector at tvbf.org>
Sent: Wednesday, August 22, 2007 7:52 PM
Subject: Re: REFLECTOR: Take-off rpm


>
>
> Hi Gordon...
>
> You said std. day, 2450 rpm's and 900 msl... 260 hp IO-540...
>
> HP=(RPM*Torque)/5252
> RPM=2450
> Torque = MP
>
> 2450 rpm's is .907 % of max rpm's
> 900 msl is about 29" of MP= .969 % of max MP(rule of thumb torque)
> .907*.935=.848 % of total HP
> HP=.848*260
> HP=228.67
>
> That's about 230HP give or take... At take off, Wide open throttle...
>
> Best... Steve
>
>
>
>
> ----Original Message Follows----
> From: <cgputney at peoplepc.com>
> Reply-To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Take-off rpm
> Date: Wed, 22 Aug 2007 14:41:15 -0500
>
> Steve, how did you estimate that HP?   Gordon.
> ----- Original Message -----
> From: "steve korney" <s_korney at hotmail.com>
> To: <reflector at tvbf.org>
> Sent: Tuesday, August 21, 2007 7:26 PM
> Subject: Re: REFLECTOR: Take-off rpm
>
>
> >
> >
> > So, at take off, your getting about 230 HP.....
> >
> > Best... Steve
> >
> >
> >
> >
> > ----Original Message Follows----
> > From: <cgputney at peoplepc.com>
> > Reply-To: Velocity Aircraft Owners and Builders list 
> > <reflector at tvbf.org>
> > To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> > Subject: Re: REFLECTOR: Take-off rpm
> > Date: Tue, 21 Aug 2007 19:04:55 -0500
> >
> > Dave, I have a 66" X 82" Catto three blade on a 260HP IO540.    @ 900 
> > msl
> > std day, get 2340 static, rising to 2450 ato.   G. Putney
> >   ----- Original Message -----
> >   From: David Bertram
> >   To: reflector
> >   Sent: Tuesday, August 21, 2007 10:02 AM
> >   Subject: REFLECTOR: Take-off rpm
> >
> >
> >         Anyone one out there running an IO-540 with a fixed pitch Catto
> > three bladed prop, what rpm are you getting on take-off?  Just normal
> > conditions not high altitude or extreme temps.
> >         Dave Bertram
> >         N350TX
> >
> >
> >
> >
> >
> >
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