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  #21  
Old 01-09-2019, 02:21 PM
redbaron redbaron is offline
 
Join Date: Aug 2013
Location: Lucerne,Ca
Posts: 238
Thumbs up RV12 Prop and spinner

Whirlwind is great to work with. I have their 3 Blade and spinner on my 12 which has a Vikingaircraftengine.com which has no time limit (5 min then back to 80% power) also fuel injected and Electronic controled
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  #22  
Old 01-09-2019, 02:28 PM
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DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 1,962
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Quote:
Originally Posted by NinerBikes View Post
That may change, with EFIS systems doing the monitoring and adjusting, minimizing workload on the pilot in the cockpit. Time will tell, more and more stuff getting automated.
"Time will tell" pretty much sums it up. I certainly wouldn't do anything counting on possible future regulatory changes. I think allowing CS props on LSA would be great, and I'd almost certainly go for one if it were possible.

Basic Med is not an option for me or my co-owner (or a few other RV-12 flyers that I know). Even if it were, there's no path from E-LSA to E-AB, so right now we have nothing but idle speculation for at least the next couple of years.
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Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
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  #23  
Old 01-10-2019, 11:09 PM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 362
Default GA-UL350-2B

I have a WW prop on my RV12 and enjoy it. It has excellent build quality and works well. I enjoy the "infinite" adjustability of it and have settled on 18º pitch and find it very smooth in operation. I'd get into my performance numbers, but those may not be comparable if you have a Rotax.

The price for my prop and spinner was very reasonable and their support is excellent. I plan to buy another prop from them for my next build. I recommend the prop and manufacturer in general.

As a bonus, the nickel leading edge they put on all of their props is wonderful. I'm have about 200 hours on the prop now and the leading edge still looks brand new.
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Ron Gawer

- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, "The Commuter"

Last edited by rongawer : 01-10-2019 at 11:11 PM.
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  #24  
Old 01-17-2019, 02:54 PM
NinerBikes NinerBikes is offline
 
Join Date: Dec 2018
Location: Granada Hills
Posts: 35
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Quote:
Originally Posted by rongawer View Post
I have a WW prop on my RV12 and enjoy it. It has excellent build quality and works well. I enjoy the "infinite" adjustability of it and have settled on 18º pitch and find it very smooth in operation. I'd get into my performance numbers, but those may not be comparable if you have a Rotax.

The price for my prop and spinner was very reasonable and their support is excellent. I plan to buy another prop from them for my next build. I recommend the prop and manufacturer in general.

As a bonus, the nickel leading edge they put on all of their props is wonderful. I'm have about 200 hours on the prop now and the leading edge still looks brand new.
How many Hobbs hours now on your commuter? We don't know what prop you may have started out with? You're adding what, 3 to 7 hours per week, commuting?

You're running a ULPower 120 hp 350 iS of some sort?

Will different rpm's of a gearboxed 912 uls with less HP have huge effect on size of prop you run, in your opinion?

Do share your performance figures, so that others considering powerplants for RV-12's can make an informed decision.

Last edited by NinerBikes : 01-17-2019 at 03:35 PM.
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  #25  
Old 01-17-2019, 10:43 PM
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 362
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Quote:
Originally Posted by NinerBikes View Post
How many Hobbs hours now on your commuter? We don't know what prop you may have started out with? You're adding what, 3 to 7 hours per week, commuting?

You're running a ULPower 120 hp 350 iS of some sort?

Will different rpm's of a gearboxed 912 uls with less HP have huge effect on size of prop you run, in your opinion?

Do share your performance figures, so that others considering powerplants for RV-12's can make an informed decision.
The WhirlWind GA-350UL-2B is the prop I started with, and yes, about 5 hours a week commuting. For the prop size, the diameter is 70", so similar to the one Van's provides with the kit, but has a pretty large chord line.

I have a UL350iS engine, which is a nice EFII engine; it's rated for 130 hp at 3300 rpm, but I don't normally go above 2800, which is the maximum continuous rpm. I don't see a lot value in running an extra 500 rpm to get 7 hp.

For performance, my climb rate, at GW, I climb out at 1400 fpm at Vy and 900 fpm at 90KT and I economy cruise at 120Kt no problem.

What moves the prop is torque, so comparing shaft torque, the Rotax is 228 ft-lbs at 2100 rpm and the UL is 236 ft-lbs at 2400 - maybe it would work - I don't know, but WW has a prop designed for the 912 and that's probably a better choice.
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Ron Gawer

- RV10, N1530G (reserved). Empennage in progress.
- RV12, N975G, "The Commuter"
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