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  #1  
Old 01-08-2022, 06:23 PM
Sarn Sarn is offline
 
Join Date: Aug 2020
Location: Peachtree City, GA
Posts: 5
Default 72" Hartzell Raptor Prop

Trying to decide on what prop to put on my 14.

Hartzell is now offering a 3 blade composite 72".

Obviously the composite is pricy, especially compared to a 2 blade aluminum.

I want a constant speed prop and trying to weight price, durability and performance.

I would prefer a 3 blade for climb performance and smoothness.

Any thoughts?
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  #2  
Old 01-08-2022, 08:02 PM
Taltruda Taltruda is offline
 
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 1,188
Default

Look into the Whirlwind HRT props.. I plan on the 2 blade myself.. the 3 blades are smooth, but I feel they are slower in cruise and could be more difficult to remove the lower cowling. Plus if you ever need to ship out the prop for service, the 2 blade box is easier to carry and ship vs the 3 blade box.. the 3 blade does look cool sitting on the ramp though!
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  #3  
Old 01-08-2022, 08:09 PM
wirejock's Avatar
wirejock wirejock is online now
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 5,217
Default Props

Kitplanes (Paul) ran an excellent article on prop selection recently.
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Estes Park, CO
wirejock at yahoo dot com
Donated 12/01/2021, plus a little extra.
RV-7A #73391, N511RV reserved (3,000+ hours)
Empennage, wings, fuse, finishing kit done. Working FWF
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #4  
Old 01-08-2022, 09:16 PM
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Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 13,022
Default

Quote:
Originally Posted by wirejock View Post
Kitplanes (Paul) ran an excellent article on prop selection recently.
Yes - I tested the three blade composite Hartzell Raptor and the three blade Whirlwind 300 - check out the July 21 issue of Kitplanes for my results and thoughts.
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RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
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  #5  
Old 01-10-2022, 11:27 AM
Sarn Sarn is offline
 
Join Date: Aug 2020
Location: Peachtree City, GA
Posts: 5
Default

Thank you all. I'l check out the article.
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  #6  
Old 01-17-2022, 05:20 PM
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hgerhardt hgerhardt is offline
 
Join Date: Oct 2006
Location: torrance, ca
Posts: 799
Default

Paul, was looking at your Kitplanes July '21 prop article and also the referenced January '21 story. Each article compared your BA Hartzell with the WW300 3-blade, but there's a pretty big discrepancy in the speed runs in the intervening 6 months. Any idea what might have caused the huge difference of your BA prop at 2700 RPM? See screenshots below:

(July 2021 test)
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(January 2021 test)
Click image for larger version

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  #7  
Old 01-17-2022, 07:52 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 312
Default 3 Blades

I have the WW 3 blade on my 14 and find cowl removal a no brainer even single person. The anti-splat nose fairing guard makes it easer. Hopefully the 10 will be the same but I think it will be ok. Smoothness and performance seem very good but I am probably biased.
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Started RV-10 Nov 2020. Empennage arrived (Built) Working on QB kits. Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 3 blade, EarthX batteries, real airplane hopefully early 2024. Paid subscriber and more. (Worth every dollar contributed).
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