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05-09-2013, 06:37 PM
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Join Date: Apr 2005
Location: KSLC
Posts: 4,021
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Quote:
Originally Posted by propsync
What would be nice is to be able to put a smaller engine on the 14 but I don't know if that is feasible, if I recall from this thread or another thread is the weight of the IO390 helps with the balance.
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For low elevations such as Florida, I suppose a smaller engine is okay. But West of Denver, in the Rocky Mtn. region...........it's the bigger the better. And throw on a constant speed prop while you're at it. Nothing worse than
than having that threat of density altitude "blues", that are so common with certified span cans.
I owned a 6A, 180HP, CS prop. Would take a 14 anytime!
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05-09-2013, 09:34 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
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Take a look at range and endurance. If you are vfr only, either is a good choice. But if you want to go ifr, there will be times when the requirement to carry enough gas to get to a good alternate, plus 45 minutes, may make you glad you have the larger gas tank on the 14.
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05-10-2013, 09:27 AM
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Join Date: Oct 2007
Location: Boston Area
Posts: 284
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I think I am almost certain it is the RV-14 which I will start.
Since I am a first time builder, I want to start the tail rather than invest $8K on the wings first. Hopefully they release the tail kit soon I would love to start by summer.
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
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05-10-2013, 09:54 AM
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Join Date: Apr 2010
Location: Statesboro, GA
Posts: 6
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I asked Vans about installing a IO360 in the 14. Got the response below. My question is at the bottom. Also asked what the kit cost difference will be between the 9A and the 14. The answer was "about 10%". I chose to go with the 9A primarily due to cost, however you may be able to justify the cost of the 14 if you project out to resale.
Answer
John: the RV-14 is designed around the angle valve engine. Putting in the significantly lighter parallel valve engine would lead to a cascade of compromises with uncertain - and probably unfavorable -- consequences. There's no doubt the choice of engines makes the airplane more expensive, but it looks like we will be able to offer the IO-390 for LESS than the IO-360-A1B6, which might take a little of the sting out of it.
The engine mount accepts any dynafocal engine, but would have to be completely redesigned to put a parallel valve engine in the correct place for CG. Same with the cowling.
We have no plans to do this. If a builder chooses to put a parallel valve engine in a 15, they're on their own, I'm afraid. How can we offer support on something we've never designed, tried or even thought about?
There are choices here. The RV-7 operates happily on 180 hp. On that engine it's performance is as good as the 14, and it's aerobatic capability is actually better. And don't overlook the RV-9 -- my all-time overall favorite. On 160 hp you can cruise at better than 160 knots -- in the real world it's not that much slower than the 14 and the 9 wing really lends itself to efficient cruise altitudes in the mid-teens.
Date sent: Fri, 19 Apr 2013
Subject: RV14
Question
I'm preparing to buy a kit but I'm having a hard time justifying the cost of the 14, firewall forward. Aside from performance and balance, are there reasons why the 14 could not be fitted with an O360 or IO360 & fixed pitch prop? The balance issue could be addressed by limiting the allowable baggage compartment load by a comparable weight x moment arm. What about the engine mount? Is the 390 engine mount compatible with the 360? What about Vans kit cost and support? Could I still buy a 360 & prop as part of a 14 kit?
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05-10-2013, 09:54 AM
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Join Date: Oct 2008
Location: Utah
Posts: 8,151
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JD,
Stop by Princeton 39N on a sunny weekend. You may change your mind 
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05-10-2013, 09:59 AM
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Join Date: Oct 2007
Location: Boston Area
Posts: 284
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Quote:
Originally Posted by Vlad
JD,
Stop by Princeton 39N on a sunny weekend. You may change your mind 
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I keep threatening you that I will. Stay tuned  Vlad is the man.
__________________
Jeff
RV-14A
Status: Wings complete(ish), Working on: Empennage. Fuselage kit on order
Location:MA
http://vans14a.blogspot.com/
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