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Old 07-17-2021, 03:02 PM
Bernie Bernie is offline
Join Date: Apr 2018
Location: Mountain Green. UT
Posts: 7
Default RV-14 Wt & Balance as affect by engine and prop choice

As my research on propellers for the IO-390-EXP119 for a tailwheel RV-14 progresses, another question has surfaced. The EXP119 is supposedly 10 lbs lighter that the stock 390. One propeller option is the new Whirlwind 300 72" 3 bladed carbon fiber prop which weighs in at 36 lbs (10 lbs or so lighter than the Hartzell 72" blended airfoil prop). Overall aircraft weight loss is generally a good thing. But is a weight loss of 20 or so lbs from the nose going to help or hinder the overall weight and balance decisions about where to install certain components? Again thoughts and comments from those ins the know would be appreciated.

Thanks, Bernie

RV-14, 140587, N914BF reserved, building for 2 years
RV-4, SN3630, modified for my 6'7" frame, flying since 5/2020
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Old 07-17-2021, 03:42 PM
MED MED is offline
Join Date: Jul 2015
Location: Aiken, SC
Posts: 759

I have the “old” I0390 Thunderbolt engine, the Hartzell 2-blade composite prop, and a B&C stand-by alternator in my RV-14A. With full fuel and just me aboard, I am just behind the forward cg limit. Losing 10 pounds on the nose would be a good thing for me. Might not be so good for the 14 taildragger.
Miss March 2020
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Old 07-17-2021, 04:31 PM
Av8rRob's Avatar
Av8rRob Av8rRob is offline
Join Date: May 2005
Location: Rescue, CA. KROB
Posts: 387

I agree that prop weight is a real concern for a taildragger if you want maximum usability with pax and cargo loads. Personally if I had a new exp 119 engine I would stick with the heavy prop.
Rob Lasater
Rv-14 flying baby, yeah.
Paid Dec 2020
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