Hanger 9 Cap232 33% WREN Turboprop coversion - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 06-26-2005, 09:08 PM   #11
I am: Boolean21
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Michael, throttle response is sluggish from idle up to 25-30% throttle stick in the air. If you are coming in to land, and you idle early, it will take time to pick-up however the prop wash is still very effective since these engines have a good thrust and you can still get control but it does take some getting used to.

This can be improved by changing some settings like ACC delay, which I will reduce and increasing the idle rpm from 45000 to possibly 50000 which I will also do and hence bump up prop rpm to 2100.

The 24x10 at 45000 idle gave me 1800rpm idle which is a bit low.
Top rpm at 140000 was 5800rpm.

My target prop rpm is 6500 and Idle about 2100. Prop rpm depends on turbine rpm of course since the gases are driving the gearbox.

I think it is important to test the behavior of a Turboprop with a plane you know. If you can install it on something you are familiar with before putting it on the Raven, it helps you sort out all the settings and get used to the response.

Just take your time and be patient setting things up.

The WREN turbine does fit the Raven. Before you buy JetCat's TBProp, read some threads. To date the Jetcat Turboprop is not a viable engine. Many have been recalled and are still at the factory to this day.

Good luck
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Old 06-27-2005, 01:37 PM   #12
Michael Warner
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Thanks for the advise
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Old 02-23-2007, 11:29 AM   #13
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Hi ! Just to understand well , when you say: ''Once I landed we checked the CG and it was behind the allowable maximum limit.'' Does it mean you had too much wait on the tail or in front ? I have the same feeling with my Cap 232 28%. Thanks !
So hard to make 3D but I love it !
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Old 02-23-2007, 12:17 PM   #14
I am: Boolean21
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Yes the plane was tail heavy. With the Zenoah, being a heavy engine, I had the batteries way back behind the wing. Once the Turboprop was installed, being a lighter engine, I moved the batteries forward but never tested the CG with 64oz of fuel. Once filled, the CG shifted back because the tank was right on the CG (well 60% behind, 40% in front due to wing tube).

I moved the batteries inside the cowl to compensate.

Hope this helps
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Old 02-24-2007, 03:35 PM   #15
Thunder Chicken
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I am: Nathan C
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What are one of those engines worth?

Are they built like a Pratt, or a garrett??!!!

Boy wouldent that engine make a nice turbo otter!!
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Old 03-05-2007, 12:03 PM   #16

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Someday Id like to get a turbo prop.. put it into a scale plane, oh ya
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