RE: Nitro models pusher Bobcat?
 

Hal,
What does it weigh?

Dave Rigotti

RE: Nitro models pusher Bobcat?
 

I have flown with Dave by the school there a few times and I don't think you would have a problem with a .60, or even a good .40.

RE: Nitro models pusher Bobcat?
 

Way to go!!!
How about some pics?

Also need final C.G.
Weight
Turbine mount
Time of flight on 32oz
Wheels and brakes
anything else you can think of.
Thanks - Galen

RE: Nitro models pusher Bobcat?
 

check out my video at the end I show how quick you can get off of a rough grass field. Thats with a GMS .76 and a 10x8 pusher, the performace maybe a little better with the apc 11x7.. and/or better engine.

http://members.cox.net/adeloney/babybobcat.wmv

RE: Nitro models pusher Bobcat?
 

Papasmurf,

The motor has 633kv and using about 45a full throttle. The ESC is E-Max 60A and the battery is of no name barnd that I got from the factory in China 5s 1p 4000 mah rated at 20-30C. The motor is actually best with an APC 13 X 6 prop, but it looks cooler with the 3 blader. I would like to try 12 X 7 or even 12 X 8 but the shops don't carry any of these sizes. One modification I forgot to mention, I rebuilt the horizontal tailplane as a flat plate instead of using the one in the kit. I feel that the flat bottom section will lift the tail too much while flying and will always cause a nose down tendency. The turbine bobcat has a large upthrust ( the exhaust points down ) but this kit has almost a zero thrustline. Just my 2 cents !!

RE: Nitro models pusher Bobcat?
 

Bobcat/ Jet Joe JJ1400

Flew the Bobcat the second time with all problems resolved
and what a dream plane for the price. It is a rocket and
that is not at full throttle. The performance with the JJ1400
is better than that of a Yellow Stingray with my Ram 500.
In fact, I compared the Stingray wing to the wing of the
Bobcat and they were almost identical(outer part). The
Bobcat is a Stingray with booms and elevator. This is the
cheapest turbine/plane you can buy. I have a video, but
it is super 8MM and not digital.

Johnny

RE: Nitro models pusher Bobcat?
 

Sweet Johhny. Good to see a couple of people having luck with the turbine conversions.

RE: Nitro models pusher Bobcat?
 

MattyC-130: YOUR Q WAS. Is the 10" CG with fuel tank empty or full?

EMPTY!!!!

RE: Nitro models pusher Bobcat?
 

Topper5, Thanks for the reply. I will post some pictures when I get my retracts installed.
Matty

RE: Nitro models pusher Bobcat?
 

Here is a pic of my retract installation. I am really, really, really slow at building... [:-]

Dave

RE: Nitro models pusher Bobcat?
 

DAVE,

What size are those Spring Airs are those ?

Thanks

RE: Nitro models pusher Bobcat?
 

hapyjac2,
I believe that they are the older 300 series. They have been collecting dust in the shop for a long time (at least 7 years). I looked up retracts.com and unable to find exact match.

Dave

RE: Nitro models pusher Bobcat?
 

those retracts look like my 605 spring air's that i have in my bobcat, page 4 post #90, not to get off the subject but dose any one have any personal exp with the Mark 61 dbb ringed motor, i'd like to replace my ys-45 with a little more p&v with out paying the high dollar for the dubb-jet motor

RE: Nitro models pusher Bobcat?
 

Now I am even more confused... (it doesn't take much... :eek: )

The retract is approximately 1" tall, with hole for 3/16" wire. I wanted a softer gear and went with 5/16" wire. The brass tube used to shim the wire can be seen in the picture.

Dave

RE: Nitro models pusher Bobcat?
 

my inst. manual says 6.9" back from the leading edge, if thats true I'll need a cinder block to balnce

RE: Nitro models pusher Bobcat?
 

All flight reports say 9.5" is the correct CG location.

RE: Nitro models pusher Bobcat?
 

OK thanks

RE: Nitro models pusher Bobcat?
 

there was an updated CG posting of 260 mm i thinks

but I am flying at 10.1" +/-.1

RE: Nitro models pusher Bobcat?
 

Great thank you

RE: Nitro models pusher Bobcat?
 

Hi guys need advise on the engine and prop size.

1-If i mount a OS91FX what would the prop size, can a 10x7p be used?
2-Would a OS 50fx be enough power for this kitty?

RE: Nitro models pusher Bobcat?
 

hay jephry if you are in SINGAPORE, then you are pretty close to sea level and i would say the 50fx will be plenty of motor for the bobcat,
if you are gonna use the 91fx i would not use smaller then a 11+ prop, in fear of over tacking the motor with a 10x8

(just my 2cents)

im using a ys-45 at about 4,500 feet and im getting 80-90+mph.

RE: Nitro models pusher Bobcat?
 

1) IMO OS91FX the would be too heavy, about 8 oz more than 50SX adding at least 4 oz of nose weight total 12 oz or more, & requires 14x6 pusher prop ground clearance issues arise. Then you would need a larger fuel tank or fly a shorter flight.

2) 50SX is a good choice quality engine and plenty of power. Note this plane was designed for a .45-.50 2-stroke. Mine flys very well with a Dub Jett .50

RE: Nitro models pusher Bobcat?
 

OK I'll throw in my 2 cents. I flew mine last weekend with an O.S.46 and a 10x8 prop tach was reading 11600 rpm. I used a 2400 mah battery pack in the nose. The CG came out around 9" from the leading edge at the root and it was a little nose heavy. The takeoff from grass was about 150' The control throws were as specified in the manual high rate is a little too much on aileron 80% DR seemed more comfortable. The weight is just under 7.5lbs Speed was 70-80 mph no speedster but very comfortable. Landing was as simple as setting up with the runway and holding some up elevator at low throttle and gliding in.
I believe a larger motor could be used without much effort, the only problem is ground clearance for the prop. Perhaps a .61 turning the same 10x8 at higher rpm would work out nicely. Or a dubbjet 40-50 and tuned pipe Oh Yeah!
Gary

RE: Nitro models pusher Bobcat?
 

anyone know who has any in stock?



Jason

RE: Nitro models pusher Bobcat?
 

Got the first flights in on mine today. About all I can say is that it flies. I got two flights in before the nose wheel turned on landing and one of the main wheel blocks popped loose when the plane skidded sideways. Not big deal but a pain to have to fix a plane after two flights. (did I mention I hate nose wheels) I am disappointed with the Saito 72, 11-7 prop combination (I know you told me so). It flew it but it didn't fly it if you know what I mean. Well seeings I have to get into the wing to reattach the landing gear block I am going with my first incliation and putting the 75 two stroke on it. Should be an improvment. For reference my CG is a 10" from the wing at the fuse and it seemed perfect.

Bassman