HI, just wondering can the MW54 turbine use on composite kangaroo?will it be under power?Thanks in advance for any info.

MP,

I'm sure you will get replys from guys who have tried it, but there have been numerous posts before about Kangaroos flying with 12 lb. class turbines like the PST J600, and it seems to do fine. You probably won't break any speed records though! I plan on powering my 'Roo with a J600 when I move the current P-80 in it to the 110% Ziroli Panther I'm working on.

Bob

110%???

MP7.5 - The MW 54 is fine for the ROO 2.
My ROO 2 is AUW 14 lb. wet, and you will not be disappointed in performance. I fly mine with TJT-2000 power at 14.5 lb thrust 150,000rpm... I would estimate top speed to be approx 140-150 mph. The great thing about the smaller MW 54 turbines is fuel economy, Iam getting easy 10 min + flights from 2 lt Kero.

Also of interest I recently saw a 24 lb scratch built scale Jaguar fly very well on a 12 lb thrust MW54. It needed a bit of runway to get up but once on step was flying very well... I would suggest most airframes with an AUW of up to 20 lb will perform very well with MW 54 turbines, as long as you are flying off a sealed strip of coarse and are not out to break any speed records.

Theres more ROO 2 pics in my gallery...


Cheers-

Yep, see:

http://www.people.vcu.edu/~rhklenke/rc/panther.html

Its enough of a project that I don't want to just call it a "Ziroli Panther"

Bob

Thanks for all the responses...I will go for the MW54+roo2(Thailand made)combo.

Ozcan,
from the pic you attach, the roo2 only has one servo on each side,
are there any advantages compare with two servos set up which come with the kit?just curious...

Cheers,

MP7.5
On my ROO 2 the wing control surfaces/ elevons are one piece from the factory. I use 1 x Hitec HS-5645 504 oz/in holding power and 168oz/in torque digital servo for each elevon control on my ROO 2
I could see no need to seperate these control surfaces and mod to two servo set up. However with that in mind, if I was to fly this model with a higher thrust turbine I would recommend doubling up just to be safe on the ROO's elevon servos...

Ozan,
the Thailand made roo come with separate control surfaces on each side, so with a 12 lb thrust turbine which Hitec servo your guys recommend..HS-5625,Hs5645,HS5925orHS5945???

Cheers,

I have an original (not composite) Roo with a Ram 500X (also 12 lb thrust). I believe that it weighs about 13 lbs dry. It is fairly light because it has ultracoated wings and fins.

It flies great with this combination, and in my opinion is a perfect turbine trainer. We consistently measure with a radar gun 140-150 mph during low passes at full power, which is just about what you want for a turbine trainer.

Marty,

I'm thinking very seriously of picking up a J600 at FL. Jets if I can and when I take the P-80 out of my 'Roo, flying it with the J600 until the plane its destined for is ready. The thing is, I fly out of a 350' grass strip. With the P-80, I'm off in less than 1/2 the strip, and less than 1/3 of the strip if I lock the brakes until the turbine spools up. What kind of performance do you think I can expect out of our strip with a J600 in the 'Roo? The thing is, I could try it, but its a one-chance kind of thing because its not going to be pretty if it doesn't get off in time...

Thanks,
Bob

Bob- As long as your grass strip is well maintained eg flat and cut, you would be fine... I am confident you should be airbourne in only a slightly longer distance than with your P-80
Also consider adding slightly larger diameter wheels all round, than you would use off of a sealed strip (less drag).

TJT reps will be attending FJ 03 and will be more than happy to show the TJT-2000 to you, and all interested jet modellers.


See you at Florida jets

MP7.5 I am sure the other Hitec servo's you mention would work just fine as well, but I would suggest the HS-5645 or HS-5945MG's- 180oz/in torque. These are very good value digital servos for the ROO elevons.

Cheers-

Thanks Marty, that is good to hear.

I hope you'll be willing to sell a few J600's at FJ too, or just taking orders there?

Bob

We have a composite Roo with a RAM 500 and love it. It has fixed gear and is about 12 pounds. Top speed is around 140. Vertical not unlimited, but it is a blast to fly and completely trouble free.

Just to throw up another 12lb + Roo example up, Leif @ Simjet is most frequently seen flying a Roo with a 1200AES simply because he loves the way that combination flys. (As seen at Superman 02)

Hi Bill_Jehle,
very interested in fixed gear set up for my roo,can you please post some pics. Thanks in advance..

Cheers,

I'll post some pictures in the next day or two. Basically, the gear is from an Ultra Sport 40. The mains are the fixed gear from the Ultra Sport kit sandwiched between two 1/4 ply plates (routed to accept the wire). This is then screwed to the LG plates on the Roo where you would normally install the retracts. The nose gear is an Ultra Sport Hobbico retract unit locked in the down position with an old strut I had laying around. You could do this in any number of ways. For my weekend beater, there is nothing to go wrong, it is light, and very cheap. We built this plane to show how inexpensive and reliable a jet can be. This combination would be an excellent trainer. I fly of a hard surface runway. You may want to consider thicker struts if you fly off rough grass.

Richard Newman built his Roo light, at my urging (I never seem to be able to do it, but he can), due to the fact that the intended power plant was a RAM 500. He Monokoted everything that could be and did not mix the epoxy with a medium cement mixer as do I. I am uncertain of what the final weight was, but he could tell you. This plane was intended to be his first turbine bird. I have flown several Roos including two of my own. His was the best flying of them all. The 500 was a perfect match for the light Roo. He currently has a PST 600 on the way for it which should work out even better. I dare say this could be the ultimate sporty first turbine plane. The AV8TR is perhaps better for those who feel they want something slower and even easier to fly.

Hi Bill_Jehle,
Thanks for the info,hope to see the pics soon..

Cheers..

Main.......

Bad picture, but hope it gives you an idea. I had to mount the retract assembly on another ply plate which was then screwed to the mount in the Roo. THe retract assembly was too small to screw to the mount in the plane.....hence.....the extra plate. The wheel collars you see in the foreground are what locks the gear down. I sure there is a simpler way, but the stuff was laying around and it works.

I just cut enough of the fuse to get the gear in. If and when you put in retracts, you just add what is needed. BTW, there is a horn above the retract unit inside for steering. The servo for the nose gear steering is screwed to the front former.

Just to show how simple a jet can be. The nose gear servo right of the butane solenoid on the front bulkhead. The batteries and a 12 oz tank (extra fuel really not needed) are behind the air brake.

Hi,

I fly my Roo 2 with J600 and Spring Air 305 retract with 2 liters of fuel. Great performance and I have shown this at Mangalore Jets 2002 in Australia. Mine Roo 2 is kept very simple and no paint finishing, just stickers. Great combination and she is fun to fly and easy to transport. Pictures: www.pstjets.com/gallery7.htm

B777

Hi guys,
Thanks for your inputs,i have just bought a roo2 and it's will be power by mw54. The are two control surfaces on each wing and the manual state that the two surfaces on each wing panel work in parallel, operating as mixed elevators and ailerons(elevons), wondering on each wing ,can i just using one control surface for elevator (inner) and the other control surface (outer) for aileron instead of elevons set up? Thanks for any input.

Cheers,