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Subject: Re: io-550 vs. tsio-550 differences?
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From: Lorn H Olsen <lorn@dynacomm.us>
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George,

Did you mean BSFC =E2=89=A1 Fuel Rate/Power
                   =3D lb-fuel/(BHp*hr)
                   =3D lb-fuel/BHp/hr
          instead of BHp/lb-fuel/hr ?

Lorn

> From: Gary Casey <casey.gary@yahoo.com>
> Date: December 20, 2009 7:34:34 PM EST
> Subject: Re: io-550 vs. tsio-550 differences?
>
> Gary,
>
> Some comments.
> .
> .
> .
> The TN IO-550N engine that Tornado Alley delivers to Cirrus will =20
> produce horsepower at 0.38 to 0.39 BHp/lb-fuel/hr across an altitude =20=

> and power range that spans anywhere from sea level to 29000 feet and =20=

> do so at 200 Hp or at 310 Hp, or anywhere in between. [The real =20
> world numbers for the Thielert diesel was about 0.36 to 0.37 BHP/lb-=20=

> fuel/hr.] There is no other general aviation engine installed in any =20=

> fleet of aircraft that works anywhere near that well across that =20
> broad range of operating  requirements and environment.
> .
> .
> .
> Regards,  George
--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,650 hrs, N31161, Y47, SE Michigan