This is the place where the majority of the warbird (aircraft that have survived military service) discussions will take place. Specialized forums may be added in the new future
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Re: My favorite Stearman is up for sale!!!!!

Sun Feb 07, 2021 2:38 pm

bdk wrote: Would be interesting to know the speeds with the R-1340.

Doubt it is anything significant. Biplanes are biplanes. You can put as much power as you want, but there is still a ton of drag to overcome. You eventually reach a point where the amount of power exceeds the structural integrity.

Re: My favorite Stearman is up for sale!!!!!

Mon Feb 08, 2021 12:15 pm

Fearless Tower wrote:
bdk wrote: Would be interesting to know the speeds with the R-1340.

Doubt it is anything significant.
Can I quote you on that slice of data?

Re: My favorite Stearman is up for sale!!!!!

Tue Feb 09, 2021 8:19 am

bdk wrote:
Fearless Tower wrote:
bdk wrote: Would be interesting to know the speeds with the R-1340.

Doubt it is anything significant.
Can I quote you on that slice of data?


Here is some quotable data for you. This is probably the slickest, top of of the range numbers one can get out of a Stearman. keep in mind A LOT of effort was put into minimizing the drag here.. Drag means more than power on the motor.

https://www.eaa.org/eaa-museum/museum-c ... 21r-n5051v

Re: My favorite Stearman is up for sale!!!!!

Tue Feb 09, 2021 11:21 am

menards wrote:Here is some quotable data for you. This is probably the slickest, top of of the range numbers one can get out of a Stearman. keep in mind A LOT of effort was put into minimizing the drag here.. Drag means more than power on the motor.

https://www.eaa.org/eaa-museum/museum-c ... 21r-n5051v


Thanks for that! Cruise Speed: 150-190 mph...

Maximum Speed: 330 mph (with or without the wing-walker?)

A stock Stearman with a metal prop should cruise a little over 100 MPH by comparison, depending on the prop pitch. I think I used to used a dive to 160 MPH for a loop entry speed to make them nice and rounded. I just can't imagine over 300 MPH in a Stearman!
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