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  #1  
Old 10-28-2015, 01:07 PM
DAS DAS is offline
 
Join Date: Oct 2015
Location: Harrison, AR
Posts: 14
Default whirlwind 74RV in taildragger?

was talking to the guys at whirlwind, and they have new prob called 74RV, which is 74inches, would this be a problem on a taildragger?

my interp of the info on vans site is that the 72 inch is rec for this application.

thought from the group?

das
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  #2  
Old 10-28-2015, 01:19 PM
flyinga flyinga is offline
 
Join Date: Dec 2007
Location: Fredericksburg, TX
Posts: 662
Default

What model plane? On my RV8 I have 72" and can't imagine one more inch making much difference as there is plenty of ground clearance.
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  #3  
Old 10-28-2015, 01:20 PM
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miyu1975 miyu1975 is offline
 
Join Date: Apr 2008
Location: Indianapolis, IN
Posts: 1,069
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I fly a 74 inch hartzell on my TW rv7, no problems with ground clearance.
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RV7 N612RA, flying since july 2012
E-170/175
RV10 Tail Kit complete, Wings 90%, fuse on order
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  #4  
Old 10-28-2015, 03:22 PM
DAS DAS is offline
 
Join Date: Oct 2015
Location: Harrison, AR
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thanks, I'm a RV7 tailwheel

das
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  #5  
Old 10-28-2015, 03:26 PM
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Larco Larco is offline
 
Join Date: Mar 2005
Location: DVT Phoenix
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74 inch Hartzell RV 7 works for me over 1000 hrs

Larry
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  #6  
Old 10-28-2015, 05:43 PM
gblanck gblanck is offline
 
Join Date: Nov 2010
Location: Redwood City, CA
Posts: 98
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No problem at all with the 74RV in an RV-8 taildragger. I originally had the 200RV 72" blades and swapped to the 74RV, no complaints.
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RV-8 Completed March 2014
Redwood City, CA
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  #7  
Old 10-28-2015, 05:57 PM
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greghughespdx greghughespdx is offline
 
Join Date: Nov 2011
Location: Aurora, OR
Posts: 843
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For people flying the 74RV, curious what engine and HP you're running with?
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.

Building RV-8A since Sept 2014 (N88VX reserved)
Dual AFS 5600, Avidyne IFD 440, Whirlwind 74RV, Superior XP IO-360
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  #8  
Old 10-28-2015, 07:08 PM
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ronschreck ronschreck is offline
 
Join Date: Mar 2006
Location: Gilbert, AZ
Posts: 1,628
Default Not to worry...

Mine is a 78-inch Hartzell composite constant speed. Still plenty of clearance.

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RV-8, "Miss Izzy", 2250 Hours - Sold
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  #9  
Old 10-29-2015, 11:24 PM
OGee OGee is offline
 
Join Date: Jul 2012
Location: Lakeway, TX
Posts: 16
Default Whirlwind 72" vs the 74"rv

Quote:
Originally Posted by DAS View Post
was talking to the guys at whirlwind, and they have new prob called 74RV, which is 74inches, would this be a problem on a taildragger?

my interp of the info on vans site is that the 72 inch is rec for this application.

thought from the group?

das
Any performance comparisons between these two props - actual or hearsay?
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N58TX RV-8 QB
Avionivs
Prior, 1955 C-170B.
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  #10  
Old 10-30-2015, 01:00 AM
gblanck gblanck is offline
 
Join Date: Nov 2010
Location: Redwood City, CA
Posts: 98
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Quote:
Originally Posted by OGee View Post
Any performance comparisons between these two props - actual or hearsay?
I've had both the 200RV and 74RV on my IO-375 powered RV-8. I haven't done any credible performance comparisons, but gut feel is that performance is generally similar, 74RV seems to accelerate, climb and slow down better, 200RV might have a slight edge in cruise speed.

The 74RV looks faster on the ground and gets a lot more attention than the 200RV did.
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