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-   -   Hartzell Composite vs. Whirlwind Composite (https://vansairforce.net/community/showthread.php?t=148419)

Nova RV 08-28-2017 05:39 AM

Bob I am a day and 2 invoice numbers ahead of you and I have not heard anything about shipping from them yet. I'm in no hurry though either.

Bob Martin 08-28-2017 08:01 AM

info
 
Quote:

Originally Posted by Nova RV (Post 1199563)
Bob I am a day and 2 invoice numbers ahead of you and I have not heard anything about shipping from them yet. I'm in no hurry though either.

Thanks Chris......good info.

db1yg 08-28-2017 04:18 PM

New WW Prop
 
I thought the new WW was for 195hp or above aircraft--is that incorrect?
Got that from WW over the phone.

db

upperdeck 08-28-2017 06:01 PM

Quote:

Originally Posted by db1yg (Post 1199769)
I thought the new WW was for 195hp or above aircraft--is that incorrect?
Got that from WW over the phone.

db

I was told the same thing, my engine is 210 hp on Titans dyno.

I'll post up any new info on delivery. For what it's worth, I placed my order at OshKosh in 2016 but deliberately delayed delivery.

Av8rRob 08-28-2017 08:16 PM

Do you guys have any details or photos of this new prop? I can't find anything about it on their website.

Bob Martin 08-28-2017 09:15 PM

195?
 
From their PDF manual on the HRT74.
2.1 Description
Performance & Quality. This 74HRT Series propeller has
been designed to maximize the performance of your
airplane. This propeller delivers exceptional performance for
the modern day sport aircraft. The exceptional performance
is derived from advanced engineering developments,
including the use of our latest airfoils.
- The 74HRT Series is a two-blade hydraulic constant
speed propeller system designed for aircraft using the
Lycoming O/IO-320, -360, -375 & -390 engines (150 -
220 hp).

EDIT: UPdated info from Bill Koleno at WW......above info is / was a typo....and is being corrected now.

db1yg 08-29-2017 08:53 AM

HRT74 Prop
 
Thanks for that Bob. The text is very informative and unambiguous. Wonder why they told at least two of us otherwise?? Think I will give them a call.

Cheers,
db

Bob Martin 08-29-2017 09:44 AM

Quote:

Originally Posted by db1yg (Post 1199921)
Thanks for that Bob. The text is very informative and unambiguous. Wonder why they told at least two of us otherwise?? Think I will give them a call.

Cheers,
db

We had to read between the lines on this very issue before purchasing. We were at SNF talking to Chaz and touching the blade displays.

See Post 17 of this thread from WW...cutting section from post:
The new HRT propeller has shown performance increases across the entire flight spectrum compared to the already great performing 200RV propeller. The most significant improvements have been in take-off acceleration and initial rate-of-climb, there is also a modest top-speed increase.

Thinking the NEW HRT74 is replacing the previous bigger bladed prop that was clearly marked for higher HP. Yet the above comments from WW say the 74HRT outperforms the 200WW. And their documentation in the manual says it can be used down to 150HP. So we are thinking the 2017 design is just that, NEW.......and we are taking a chance.

FYI...when I say we, I am speaking of my hangar mate and I. Each with RV-6's and 0-360 A1A's...but his 0-360 has 9.1 pistions and Lycon flowed cylinders and clearly has more more than my stock 180. (but not dyno'd). I plan to install on both planes to compare performance. Hopefully the new blade design will or is cutting edge and be a winner.....Time will tell.

db1yg 08-29-2017 09:54 AM

HRT
 
Thanks Bob,

Looking forward to the test results!

Cheers,

db

db1yg 08-30-2017 09:32 AM

HRT Prop
 
Hey Guys,

Late yesterday I talked with Bill K. of Whirlwind. He is involved with the testing of their propellers including the HRT74. Bill tells me that the new HRT74 prop is designed for 205 hp or above. He suggested that if you have an HRT74 ordered and do not meet this minimum hp you should give Whirlwind a call.

Thought you folks needed to find this out now.

Cheers,

db


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