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  #1  
Old 08-07-2019, 07:35 AM
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MS19087 MS19087 is offline
 
Join Date: Nov 2006
Location: West Chester, PA
Posts: 689
Default Whirlwind 300-72 on RV-14A

I understand that there may be a few -14As flying with the new 300-72 prop. WW has now approved this prop up to 220HP which makes it an option.

RV-14 owners flying this prop, Please share you experience . . .

Besides the challenges of cowl removal (which i had on my 3 bladed -9A), how did you deal with the W&B. This prop is 36lbs - the Hartzells are 42lbs (composite) & 54lbs (metal). That is a huge difference in weight on the nose. Did you add weight firewall forward? Are you limited in baggage capacity? Kind of defeats the one of the advantages of the -14.

Thanks
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  #2  
Old 08-11-2019, 08:04 PM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 101
Default W&B

I ordered the 300-72 after many hours of W&B calculations. I have 2 Earth X?s on the firewall and a second alternator and could not find an issue. Sure for acro no baggage is allowed but would you be flying acro with baggage? Utility W&B not an issue.
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RV-14A QB building, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Parts became a real airplane 8/15/2020.
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  #3  
Old 08-13-2019, 11:25 AM
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kiljoy kiljoy is offline
 
Join Date: Sep 2014
Location: Alameda, CA
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Default

Quote:
Originally Posted by dmattmul View Post
I ordered the 300-72 after many hours of W&B calculations. I have 2 Earth X?s on the firewall and a second alternator and could not find an issue. Sure for acro no baggage is allowed but would you be flying acro with baggage? Utility W&B not an issue.
I sent you a PM about your battery setup.
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  #4  
Old 08-13-2019, 01:06 PM
mturnerb mturnerb is offline
 
Join Date: Apr 2015
Location: Ponte Vedra, FL
Posts: 1,474
Default

Check out the RV-14/14A weight and balance thread if you haven't already (http://www.vansairforce.com/communit...d.php?t=133335).

I had a Bonanza with the 3 blade version of the standard metal Hartzell, and was very happy with that, so it was easy for me to go with that option - and I'm happy with it so far now that I'm flying.
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  #5  
Old 08-13-2019, 01:17 PM
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Brent 801 Brent 801 is offline
 
Join Date: May 2012
Location: Conroe, TX
Posts: 37
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Mark,

I see no adverse affects from a lighter prop on your RV-14. Calulating 18 lbs. less weight approximately 63 inches forward of the empty center of gravity moves the empty CG aft about .25 inches. This would actually be advantageous. at least for my airplane, because it is possible to exit the forward CG envelope with a very light pilot, and not possible to exit the aft CG envelope at GW with 100 lbs. baggage by a large margin.

However, I personally prefer a two bladed prop for performance reasons.
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  #6  
Old 01-09-2020, 06:54 AM
Jumpbat74 Jumpbat74 is offline
 
Join Date: May 2019
Location: Portland OR
Posts: 7
Default Tear Down Cost?

Whirlwind shows the Teardown time on the 300 as 650 hours. Any idea what that costs and what is involved? That seems really low compared to the Hartzell options.
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  #7  
Old 01-11-2020, 05:36 AM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 101
Default Fit and Finish

Although not flying (And not yet even installed) the fit and finish of the prop looks spectacular. Hopefully get it mounted in the next few weeks.

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RV-14A QB building, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Parts became a real airplane 8/15/2020.

Last edited by dmattmul : 01-11-2020 at 05:45 AM.
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  #8  
Old 01-11-2020, 05:42 AM
dmattmul dmattmul is offline
 
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 101
Default Picture attached

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RV-14A QB building, Lycoming 390 Thunderbolt arrived July 2019, Garmin avionics, Vertical Power, EFII-32 Ignition and Fuel, Whirlwind 300-72, Parts became a real airplane 8/15/2020.

Last edited by dmattmul : 01-11-2020 at 07:11 AM.
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  #9  
Old 01-11-2020, 05:46 AM
RV6-KPTW RV6-KPTW is offline
 
Join Date: Oct 2014
Location: Sebastian Fl X26
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I had an RV200 rebuilt a little while ago and spent about 2100 including shipping.
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- RV14 sn:140193 - first flight 12/19/2019
- 2000+ hours on my RV6! Sold (so sad...)
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Last edited by RV6-KPTW : 01-11-2020 at 10:45 AM.
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  #10  
Old 01-11-2020, 07:00 AM
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BCP Boys BCP Boys is offline
 
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Location: Kennesaw, Ga
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Quote:
Originally Posted by RV6-KPTW View Post
I had an RV200 rebuilt a little while ago and spent about 2100 not including shipping.
Dennis, how many hours were on the prop when you had it rebuilt? I've been told by several RV200 owners that they have only inspected the prop and it has worked flawlessly to past 1000 hours and many more.
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