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Hartzell BA Prop vs. Composite Prop

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robin1(at)mrmoisture.com
Guest

Posted: Fri Oct 02, 2009 9:24 am Post subject: Hartzell BA Prop vs. Composite Prop

It's time to drop the dollars on a prop for my 8A project. Has anyone

seen a real performance comparison between the two blade Hartzell

Blended Airfoil prop and the two blade Hartzell Composite Prop? (Both

74").



Thanks,

Robin

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RobHickman(at)aol.com
Guest

Posted: Fri Oct 02, 2009 10:26 am Post subject: Hartzell BA Prop vs. Composite Prop

After doing multiple runs on multiple days in my RV-4 with the new Hartzell  composite two blade propeller I have found the  following:



RV-4

180HP IO-360 with one PMAG

Pilot  Only

Altitude 5,000 ft

2500 RPM

Full throttle 24.9” Manifold

50 deg  ROP

Fuel flow 11.3 GPH



I used the autopilot to fly a ground track N,  E, S, W for 2 to 3 minutes per leg and then put the data in the NTPS spread  sheet to calculate the TAS.



Result = 178.8 KTS



I have replaced the  composite prop with a new Hartzell D-Twist Scimitar metal prop and should have a  comparison next week.

  

 

Just for fun I decided to do the same test in my RV-10 with the  Hartzell three blade composite prop. I only made one flight to test the numbers  and will repeat it a number of times to verify the  results.



RV-10

IO-540 with one Light Speed Ignition

Pilot  Only

Altitude 5,000 ft

2500 RPM

Full throttle 25.2”  Manifold



Result = 176.3 KTS



Rob Hickman

N401RH RV-4 180HP

N402RH  RV-10 260HP



  [quote][b]

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