Nitro models pusher Bobcat?
#1351
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RE: Nitro models pusher Bobcat?
[/The best combination I have been able to put together is .75 2 stroke with a 10/6 prop. Sounds crazy putting a 10/6 on a 75 but it really made a big difference. I tired an 11/7 three blade a 10/7 three blade a 12/6 , 11/7, 10/7 and the 10/6 2 blades. The 10 /6 was by far the best for speed! Oh ya I tried a 91 4 stroke a 91 2 stroke and the .75 2 stroke with the .75 working out the best. I'm thinking that the new OS 55 might just be the perfect engine for the bobcat!
#1352
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RE: Nitro models pusher Bobcat?
ORIGINAL: Stick Jammer
Rodman63,
Nice job on the maiden and the video, the landing was just the way it's supposed to be with this type of plane . Where's the CG on your plane and what were your control throws?
Rodman63,
Nice job on the maiden and the video, the landing was just the way it's supposed to be with this type of plane . Where's the CG on your plane and what were your control throws?
I set the CG at 10.5" from the leading edge , might be a little pitch senitive there.
controll throws base setting were 30degrees high rate and 10degrees low rate, on all control surfaces.
I havent put enought flight time on it to fine tune that, but I am sure I'll have to turn them down.
high rate aileron roll was just sick.
We just got another 6" of snow, but once that is gone I will get the radar gun out and make another video
I am wondering just what the speed is on that 46 AX.
Will keep you posted.
#1353
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RE: Nitro models pusher Bobcat?
controll throws base setting were 30degrees high rate and 10degrees low rate, on all control surfaces.
#1354
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RE: Nitro models pusher Bobcat?
ORIGINAL: Stick Jammer
You guys have gotten your share of the white stuff this winter for sure. Snow's been gone here for a couple weeks but it's just plain soggy everywhere with more rain in the forecast. Thanks for the info, my CG is exactly the same. Did you land with low rate elevator or high? I definitely want the nose up on my first landing.
controll throws base setting were 30degrees high rate and 10degrees low rate, on all control surfaces.
and shocked at how stable it was at that nose high attitude.
once the field is clear again I plan on putting some G's on the plane to what it can do, and what speed its clocking.
goodluck with your bobcat.
#1355
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RE: Nitro models pusher Bobcat?
Well did my maiden flight today and what an adventure. This is most def not a 2nd plane for someone. I have been flight for a while and have 3 large scale plane but this one is a different bread of flying. Had 1 good landing and the rest were bounce. Plane comes in hot. I need to work on flaring it at the end to make thing more smooth. Have tower .75 for power with 11x7 prop. The aileron was way too sensitive to recommended throw in the book so I decrease it with little expo. This will be a fun plane to rip the sky. Had 3 flight today and will get about 6-8 2morrow. Have my CG at 10
#1356
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RE: Nitro models pusher Bobcat?
I contacted Nitroplanes They will have canopies in about 3 weeks FYI .
Jason
http://www.nitroplanes.com/canopies.html
Jason
http://www.nitroplanes.com/canopies.html
#1358
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RE: Nitro models pusher Bobcat?
Well here is my 3rd flight
http://media.putfile.com/Bobcat-50
was kinda windy 12mph with gust to 16 but what the heck was dying to see it fly. I had to move my CG to 9.5
enjoy
http://media.putfile.com/Bobcat-50
was kinda windy 12mph with gust to 16 but what the heck was dying to see it fly. I had to move my CG to 9.5
enjoy
#1360
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RE: Nitro models pusher Bobcat?
I put the spring airs 305 on it and have the stearing retract move foward toward the nose when up. I think the 301s would work too. its really a 16x10 and cut down. I used 14x7 but the prop flexs too much and was chopping the wing plus was way too loud.
#1361
RE: Nitro models pusher Bobcat?
As you can see the bobcat is complete... The pictures show a few of the major changes that get this plane in the air...The cg was at 10 & 1/4 inches.....I added a 16 oz tank for the extra flight time....Faces forward with fuel lines running back to engine.... When the plane sits it still seemed nose heavy.... We'll have to see..... Below are just a few modifacations that were suggested in the RC Universe airplane forums that I performed......
1. The wings had to be cut into to reinforce the mains landing blocks...
2. Mains installed backwards to get them closer to the cg .....
3. Elevator servo installed in elevator to provide better throws and leverage...
4. Canopy was red... Painted black... Installed with 2 screws with blind nuts.....
5. Special canopy mount to allow only 2 screws to allow removal.....
6. Wings were screwed in with blind nuts, not glued.....This will allow disassemble if needed.....
7. Trailing edge supports to secure wings from giving flutter.......
8. Cut my own motor mounts as the ones that come with it were to soft.....
55AX with 11 / 7 prop
4 3004 futaba servo's 2 on the ailirons, 1 for front wheel, 1 for throttle....
2 3000 series tower hobbie micro servo's on the rudders
1 225 hitec micro servo in the elevator
I don't know when I will fly her...Still need to break in the motor
If anyone can tell me anything about this muffler, like what kind it is and were can you get one, Thanks
Mark
1. The wings had to be cut into to reinforce the mains landing blocks...
2. Mains installed backwards to get them closer to the cg .....
3. Elevator servo installed in elevator to provide better throws and leverage...
4. Canopy was red... Painted black... Installed with 2 screws with blind nuts.....
5. Special canopy mount to allow only 2 screws to allow removal.....
6. Wings were screwed in with blind nuts, not glued.....This will allow disassemble if needed.....
7. Trailing edge supports to secure wings from giving flutter.......
8. Cut my own motor mounts as the ones that come with it were to soft.....
55AX with 11 / 7 prop
4 3004 futaba servo's 2 on the ailirons, 1 for front wheel, 1 for throttle....
2 3000 series tower hobbie micro servo's on the rudders
1 225 hitec micro servo in the elevator
I don't know when I will fly her...Still need to break in the motor
If anyone can tell me anything about this muffler, like what kind it is and were can you get one, Thanks
Mark
#1363
RE: Nitro models pusher Bobcat?
it looks like a Slimline pitts but Tower doesn't have a inverted pitts, The body of it definately looks like a Slimline with the round end (see pic) One pipe is probably cut short and plugged for more backpressure to the tank. So my guess is a inverted slimline Pitts.
Dauntae
Dauntae
#1364
RE: Nitro models pusher Bobcat?
Figured it out!!!! It's a 3208 Slimline Sport Scale 1 O.S. with the pipes cut down and one pipe closed to increase the tank pressure....I think it's perfectly suited for this application....I mounted the fuel tank plug facing forward...Anyone had trouble with this setup.....
Mark
Mark
#1365
RE: Nitro models pusher Bobcat?
Hey Gofastz,
Nice pics. I'm just starting to assemble mine and your pics will come in handy. Can you show how you mounted your wings?
Also, what kind of receiver are you using? I'm particuarly interested in how you're routing the antenna.
Thanks, Chris
Nice pics. I'm just starting to assemble mine and your pics will come in handy. Can you show how you mounted your wings?
Also, what kind of receiver are you using? I'm particuarly interested in how you're routing the antenna.
Thanks, Chris
#1366
RE: Nitro models pusher Bobcat?
Chris,
I just ran the antenna the length of the fusalodge using a control rod tube. I ran the wire into the tube and ran it to the end of the fusalodge then carefully bent it and ran it up torwards the nose...only about 4 inches of wire is exposed and running back to the Rx......It's a 8 channel futaba FM.....mid-way in the canopy section is a support running across, that the servo tray is connected to....I slipped the tube that has the antenna wire under the lip and between that support section and used thick CA to secure it.....works well....Note to everyone....I had to turn my fuel tank around to face the rear as the return pressure line was not giving good pressure to the tank during ground testing.......Ran a u bend in the tank to allow the clunk to sit under the stopper so it act's like a tank sitting forward.......Mark
I just ran the antenna the length of the fusalodge using a control rod tube. I ran the wire into the tube and ran it to the end of the fusalodge then carefully bent it and ran it up torwards the nose...only about 4 inches of wire is exposed and running back to the Rx......It's a 8 channel futaba FM.....mid-way in the canopy section is a support running across, that the servo tray is connected to....I slipped the tube that has the antenna wire under the lip and between that support section and used thick CA to secure it.....works well....Note to everyone....I had to turn my fuel tank around to face the rear as the return pressure line was not giving good pressure to the tank during ground testing.......Ran a u bend in the tank to allow the clunk to sit under the stopper so it act's like a tank sitting forward.......Mark
#1368
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RE: Nitro models pusher Bobcat?
Note to everyone....I had to turn my fuel tank around to face the rear as the return pressure line was not giving good pressure to the tank during ground testing.
But..the main thing is that you get a system that works for you..
#1369
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RE: Nitro models pusher Bobcat?
Bobcat update
I put 3 flights on my bobcat saturday,
I had moved the CG from 10.5 to 9 3/4" the plane lands much easier now.
I had the radar gun on it, and with the OS 46 AX 10x8 apc prop, it consistently ran 95-97 mph, 102mph out of a shallow dive.
the nose still pitches up when throttling up, does anyone else notice this?
I also knocked the main gear loose again, this is going to be an issue, I may bolt up some flat aluminum landing gear
I have a set from an ultra stick 60 that is the right hieght wont be pretty but it will work.
I put 3 flights on my bobcat saturday,
I had moved the CG from 10.5 to 9 3/4" the plane lands much easier now.
I had the radar gun on it, and with the OS 46 AX 10x8 apc prop, it consistently ran 95-97 mph, 102mph out of a shallow dive.
the nose still pitches up when throttling up, does anyone else notice this?
I also knocked the main gear loose again, this is going to be an issue, I may bolt up some flat aluminum landing gear
I have a set from an ultra stick 60 that is the right hieght wont be pretty but it will work.
#1370
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RE: Nitro models pusher Bobcat?
Had about 5 flight today and still tweaking it. I had to move my CG to 9.5 and it track straight at any speed and in the turns is good. only problem is flying inverted wont fly straight. working on the incidence now but only off very little.
#1373
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RE: Nitro models pusher Bobcat?
Hey Marty,
He likes it OK. He needs some practice on the landings. I told him to work on landing the Kingcat in RealFlight - if you can land that without bouncing, you can land ANYTHING. I should have the A10X with the P-80 in it ready in a few weeks. I think he'll like that too because its a "real" jet. I think he likes his UCD .46 the best still though, because its a piece of cake to land and it can do lots of "adabatics."
Bob
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@] We gotta' get back out to Ft. Pickett. Of course the down side is that Louie's Bobcat landing on the Ft. Pickett runway would probably have damaged it significantly...
He likes it OK. He needs some practice on the landings. I told him to work on landing the Kingcat in RealFlight - if you can land that without bouncing, you can land ANYTHING. I should have the A10X with the P-80 in it ready in a few weeks. I think he'll like that too because its a "real" jet. I think he likes his UCD .46 the best still though, because its a piece of cake to land and it can do lots of "adabatics."
Bob
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@] We gotta' get back out to Ft. Pickett. Of course the down side is that Louie's Bobcat landing on the Ft. Pickett runway would probably have damaged it significantly...
#1374
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RE: Nitro models pusher Bobcat?
ORIGINAL: rhklenke
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
Marty
#1375
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RE: Nitro models pusher Bobcat?
ORIGINAL: afterburner
Ouch![&o]. Sorry to hear that. Did the xwind catch you? The wind started picking up here pretty strong in the late afternoon. Looking forward to getting back out to Pickett.
Marty
ORIGINAL: rhklenke
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
Marty
Bob