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Thrust, props and parts

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smokey_bear_40220(at)yaho
Guest

Posted: Fri May 12, 2006 8:09 pm Post subject: Thrust, props and parts

Hey Rick,



Several things:



First, for prop efficiency, what gearing did you

change to from the 2.23 : 1 you had?  Did that help?



I know I am running my prop way under the most

efficient rpm, takeoff and cruise.  Did you try a 2:1

ratio?



I often takeoff at 5000 RPM or less to save the

engine, but that last 10% rpm makes a real difference

in performance, especially the last 300 rpm.  I know

the turbo helps there, but I think that the prop is

just getting into its element at the engine RPM limit.



Wish I had a set of 2:1 gears, if that is what you had

and they worked for you.  I'd like to fly the prop in

a more efficient range.  I assume the Soob torque can

handle it, though it is mostly more rpm and less

pitch.



Second, put me down for your gas caps, trim assist and

oil cooler.  Still considering some of the rest

available.  I'll have to finalize soon as I can get

time with the Fox and think about it.  I'll try to

keep it to one more shippment, unless you need the

space or $ now.



Third, spinners.  Who was it that was flying along and

heard a bang and the engine smoothed out?  After

landing found the spinner was gone?  Usually we add

parts to make things better, but sometimes "divorce"

helps.



Kurt S.  S-5



--- wingsdown <wingsdown(at)comcast.net> wrote:

 

 	  Quote: 	
		    Exactly. Static thrust only gives that relationship

 to other props at that static RPM..............


	


 	  Quote: 	
		   This list most likely provides more real un-hyped

 numbers than any company will ever supply

 particular to the aircraft we fly. 22s on a Hummer.

 That gives me a great idea. Spinners for aircraft

 rims...I think they are 100 percent efficient and

 minimal flex under static loads. 

 

 Rick


	


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wingsdown(at)comcast.net
Guest

Posted: Sat May 13, 2006 4:58 pm Post subject: Thrust, props and parts

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