pilott28

My Feedback: (27)

Looking for people who can tell me a little about acquiring, building and flying the Turbo Raven from AirWorld. There are some very nice videos in the Mig 21 thread, and I'm interested in this plane.

smudgersmiff

Here you go Keith

2 Turbo-Ravens Click here to watch 2-Turbo-ravens-NO-music

Turbo-Raven Torque roll Click here to watch Torque-Roll-Turbo-Raven

Enjoy

Jeff

The boys Back

the 2 Ravens in the Video are Gruapner ones fitted with Jetcat Turboprops. mine is the red one and Ali's is the Yellow one
Ali's has a standard engine and mine is wound up a fair bit! i am on about flight 50 with this "wound up" engine without a single problem

i have seen the Airword one fly and it looks just as capable.

Dave Stephens

Robrow

Dave, how do you find the JC Turboprop compares with say a Wren Turboprop ?

Rob.

WrenTurbines

The Airworld Raven was developed two years ago, using the Wren Turboprop engine. Their top pilot, Thomas Gleisner (World Masters Champion) has flown their show model all over Europe for the last two seasons, and has had no problems with the engine. It has been returned to us for a service and checkup at the end of each season, and is back with Thomas for a third year now.
There are important issues regarding airflow when installing turboprop engines, but a customer of ours "KJ-66" did an excellent installation with photographs in a thread here some time ago. I'm sure he will be happy to give help and advice on building.

http://www.rcuniverse.com/forum/m_33..._1/key_/tm.htm

Sara Parish
Wren Turbines

The boys Back

I have both Jetcat and Wren Turboprops.

they both perform perfectly, but i will say that the service you get from Wren is second to none

Dave

Robrow

Yes, the service from Wren is without question.

Rob.

pilott28

My Feedback: (27)

Dave, do the Wren and the JetCat put out similar power? What size props to they use?

The boys Back

they do produce similar power, i run a 28 x 10 wood 2 blade on both the Wren and the Jetcat. i have not experimented much as the planes are SO overpowered it has not been required.

Dave

AWAR

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Robrow

Story ??????????

Rob.

nmacwarbirds

Dear Rob
It is the fullsize which I think suffered engine failure.
Fortunately the Pilot, Wayne Handley survived.
Regards Phil G.

Woketman

My Feedback: (6)

They should have had a Wren!

The boys Back

if you read the accident reports they put it down to pilot error!!

-JC-

My Feedback: (26)

Hi Keith,

Airworld USA is the importer of the Turbo Raven, and we are currently building one and updating the instructions to US specs.
This one will be powered by the JetCat turboprop unit, and we will document the entire set-up. The formers are already installed in the kit and it is a very fast build. The gelcoat is red, and there is a very nice decal set available.

Let me know if there is any information I can provide you with.

Bob_Wilcox

My Feedback: (1)

I just received our Airworld Turbo Raven last week from Airworld USA. It came with a CD full of pictures showing the step-by-step assembly and it seems OK to me. Very similar to the L39 kits. The quality of the glass work is excellent and not like the L39, the formers are already installed. The only thing I would not use are the decals except maybe as paint masks. Both Jason Somes and myself will be flying this plane in the near future. Mainly Jason . Anyhow, you will not be disappointed in the kit! I also just got the latest software revision for the SPT-5 and the new acceleration profile from 1/2 to full power is now instant. I been flying this V5.0X software in my P60 powered Boomerang for the last couple of weeks and it has surprised everyone I have demonstrated it to. However, with the turbo prop this acceleration is so pronounced it is just scary. It should make the raven a lot of fun....

FBaity

My Feedback: (2)

Any up dates on the Raven build ? I too have the Airworld kit with CD and find the lack of basic component location ( control horn location, CG with Wren engine, fuselage servo location) building instructions poor to non existant.

Frank Baity
AMA 38026

SAMI777

Gentlemen

Have been trying to tame the beast , but my Turbo Raven has the uncanny ability to pitch up when the throttle is retarded on approach and landing , making it quite nightmare to land.
Has anyone had a similar experience.The provided CG by the manufactureres indicate 240mm aft of the leading edge, yet some have flown in at 138mm behind the leading edge , a considerable difference as you can see.Any feed back is much appreciated, power plant is the SPT50 and Biela 3 bladed 24x 12 prop.

Malcolm H

Sammi,

Pitch up with reduction in power is usually a sign that there is too much down thrust on the motor with respect to the incidence at which the wing needs to fly to generate lift. There are other things that affect this such as CG location but as you are flying at the recommended CG let's leave that for the moment.

There are two ways to reduce the effective down thrust, alter the angle at which the motor is mounted in the fuselage or reduce the wing incidence. I'm not familiar with the Raven kit so don't know how easy either of these options are but for example if it's a two piece wing mounted on a tube there will be incidence pins that stop it rotating on the tube and reducing the incidence is a matter of moving these pins. Unless of course incidence adjusters are fitted in which case you adjust them! A one piece wing is harder you need to lower the leading edge and pack the wing seat. Adjusting the down thrust of the motor might be a matter of adding packing somewhere but the limitation is often the mating of the spinner and nose ring.

One other point, altering the wing incidence will alter the angle at which the fuselage flies as the wing always flies at the angle it needs to generate exactly the amount of lift to support the weight of the model. So if in level flight your model flies tail high this would point to excessive incidence.

Hope this helps,
Malcolm

SAMI777

Thanks Malcolm and apologies for the late response.

I shall give this a try and see how it goes by altering the thrust line upwards by aprox 3-5mm.

Your help is much appreciated

SAMI777

Not sure if this posting went on the forum , but I am looking for some building insructions for the YAK130 by Jet Legend.
Any help would be highly appreciated

Malcolm H

Sami,

I'm not sure what you mean by 3-5mm? It is the angle of the thrust line with respect to the wing that you want to alter. It is better to talk in terms of angle rather than linear measurement. I would start by trying to reduce the angle approx. 1 degree and see what effect this has.

Kind regards,

Malcolm