Pratt & Whitney R-1830 performance chart
 

Hello
Does anyone have performance chart for R-1830? I am particularly interested with power vs height data - I cannot find them on the web nor in my stuff.
TIA

Re: Pratt & Whitney R-1830 performance chart
 

On what version/model?

Juha

Re: Pratt & Whitney R-1830 performance chart
 

R-1830-33 (without exhaust driven supercharger), but actually any will do.

Re: Pratt & Whitney R-1830 performance chart
 

Franek

Is there no info on the Stirling/Williams website http://www.wwiiaircraftperformance.org/ ?

Steve

Re: Pratt & Whitney R-1830 performance chart
 

Steve
At least I have not found them there.

Re: Pratt & Whitney R-1830 performance chart
 

Franek,

I have the original 'Operators Handbook' (Not a copy) for the Pratt & Whitney Twin Wasp C4 R-1830 Engine which gives various charts on the engine performance. If you would like scans of the charts please PM me with your email address.
and in the next couple of days I'll send them on to you.

Regards
Peter.

Re: Pratt & Whitney R-1830 performance chart
 

Hello Franek
It seems that Peter will deliver just what you want, but here some info from “Detail specifications for Curtiss Hawk 75-A Airplane” from Curtiss.
P&W Twin Wasp S3C3-G geared
Horsepower max. at critical rammed alt. 950
Horsepower at takeoff (2700 rpm) 1100
Horsepower max at cruising (2200 rpm) 700
Horsepower max at sea level (2700 rpm) 950
Compression ratio__________________6.7:1
Blower Ratio______________________8.0:1
Propeller Gear Ratio________________16:9
Propeller Diameter (Curtiss 3 Blade) 10’-1½”

For H-75A with this engine critical altitude was 4650m.

Juha

Re: Pratt & Whitney R-1830 performance chart
 

Franek, I have power (sea level and altitude powers at multiple settings using 87 octane fuel) and sfc curves for the SC3-G model, from the Finnish manual.

Re: Pratt & Whitney R-1830 performance chart
 

Thanks guys. Jukka, I think that Peter's charts will better suit my needs, but you never know. I think you have my e-mail.

Re: Pratt & Whitney R-1830 performance chart
 

Hi Franek !

Wszystko co tyczy P&W 1830 jego rozwój ,dokładne dane techniczne wraz opisem elementów plus sprężarki , i w których modelach i jakie montowano - moge Panu przesłac po zeskanowaniu ( tego jest kilka stron ) .

Pozdrawiam
Mieczysław