RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

Nitro models pusher Bobcat?

Reply
Old 03-20-2007, 07:10 PM
  #1351
Wayne22
 
Wayne22's Avatar
 
Join Date: Apr 2002
Location: Strathcona county, AB, CANADA
Posts: 5,391
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Quote:
[/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!
Thanks for doing all that testing for us !!!
Wayne22 is offline  
Reply With Quote
Old 03-20-2007, 09:15 PM
  #1352
Rodman63
 
Rodman63's Avatar
 
Join Date: Feb 2006
Location: Washingtonville, NY
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?


Quote:
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?
Thanks stick Jammer
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.
Rodman63 is offline  
Reply With Quote
Old 03-21-2007, 06:38 PM
  #1353
Stick Jammer
 
Join Date: Nov 2002
Location: Crete, IL
Posts: 2,251
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Quote:
controll throws base setting were 30degrees high rate and 10degrees low rate, on all control surfaces.
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.
Stick Jammer is offline  
Reply With Quote
Old 03-21-2007, 07:28 PM
  #1354
Rodman63
 
Rodman63's Avatar
 
Join Date: Feb 2006
Location: Washingtonville, NY
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?


Quote:
ORIGINAL: Stick Jammer

Quote:
controll throws base setting were 30degrees high rate and 10degrees low rate, on all control surfaces.
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.
Yes I was on high rate for the landing, and pulling hard on the stick I was surprized at long I was able to hold it off.
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.
Rodman63 is offline  
Reply With Quote
Old 03-21-2007, 09:59 PM
  #1355
patzane
 
Join Date: Nov 2005
Location: Glendale, AZ
Posts: 653
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
patzane is offline  
Reply With Quote
Old 03-22-2007, 04:47 AM
  #1356
dragraces
 
Join Date: Oct 2004
Location: cleves, OH
Posts: 84
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

I contacted Nitroplanes They will have canopies in about 3 weeks FYI .



Jason

http://www.nitroplanes.com/canopies.html
dragraces is offline  
Reply With Quote
Old 03-22-2007, 09:14 PM
  #1357
patzane
 
Join Date: Nov 2005
Location: Glendale, AZ
Posts: 653
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

are anyone using a bigger tank than the stock. If so what size
patzane is offline  
Reply With Quote
Old 03-23-2007, 07:11 AM
  #1358
countryshooter
 
countryshooter's Avatar
 
Join Date: Oct 2005
Location: Clarksburg, NJ
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
countryshooter is offline  
Reply With Quote
Old 03-23-2007, 11:47 AM
  #1359
Rodman63
 
Rodman63's Avatar
 
Join Date: Feb 2006
Location: Washingtonville, NY
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Nice flight Countryshooter!
That 13x10 prop was realy ripping on that 91.
Witch retracts do you have in your bobcat?


Attached Thumbnails
Click image for larger version

Name:	Tq48556.jpg
Views:	13
Size:	13.0 KB
ID:	648084  
Rodman63 is offline  
Reply With Quote
Old 03-23-2007, 12:12 PM
  #1360
countryshooter
 
countryshooter's Avatar
 
Join Date: Oct 2005
Location: Clarksburg, NJ
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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.
countryshooter is offline  
Reply With Quote
Old 03-23-2007, 09:08 PM
  #1361
gofastz
 
gofastz's Avatar
 
Join Date: Nov 2006
Location: Callahan, FL
Posts: 87
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
Attached Thumbnails
Click image for larger version

Name:	Ge94782.jpg
Views:	13
Size:	144.7 KB
ID:	648393   Click image for larger version

Name:	Ni24227.jpg
Views:	15
Size:	67.2 KB
ID:	648394   Click image for larger version

Name:	Ot48896.jpg
Views:	11
Size:	68.8 KB
ID:	648395   Click image for larger version

Name:	Cv62068.jpg
Views:	11
Size:	48.5 KB
ID:	648396   Click image for larger version

Name:	Xj63044.jpg
Views:	12
Size:	38.4 KB
ID:	648397   Click image for larger version

Name:	Iz38605.jpg
Views:	10
Size:	124.4 KB
ID:	648398   Click image for larger version

Name:	Eg78391.jpg
Views:	11
Size:	53.8 KB
ID:	648399   Click image for larger version

Name:	Ec99699.jpg
Views:	13
Size:	80.9 KB
ID:	648400  

Click image for larger version

Name:	Gf67912.jpg
Views:	12
Size:	42.6 KB
ID:	648401  
gofastz is offline  
Reply With Quote
Old 03-24-2007, 08:33 AM
  #1362
Crazy4Flight
 
Crazy4Flight's Avatar
 
Join Date: Sep 2002
Location: Milford, MI
Posts: 3,013
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?


Quote:
ORIGINAL: gofastz

If anyone can tell me anything about this muffler, like what kind it is and were can you get one.

Looks like is came from the ACME Pipe Organ Company.
Crazy4Flight is offline  
Reply With Quote
Old 03-24-2007, 10:59 AM
  #1363
Dauntae
 
Join Date: Jun 2002
Location: New Bedford, MA
Posts: 1,212
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
Attached Thumbnails
Click image for larger version

Name:	Mk26390.jpg
Views:	9
Size:	10.4 KB
ID:	648729  
Dauntae is offline  
Reply With Quote
Old 03-24-2007, 11:34 AM
  #1364
gofastz
 
gofastz's Avatar
 
Join Date: Nov 2006
Location: Callahan, FL
Posts: 87
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
Attached Thumbnails
Click image for larger version

Name:	Hf97853.jpg
Views:	27
Size:	11.2 KB
ID:	648746  
gofastz is offline  
Reply With Quote
Old 03-24-2007, 03:20 PM
  #1365
Aero D
 
Aero D's Avatar
 
Join Date: May 2005
Location: Maitland FL
Posts: 74
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
Aero D is offline  
Reply With Quote
Old 03-25-2007, 12:47 AM
  #1366
gofastz
 
gofastz's Avatar
 
Join Date: Nov 2006
Location: Callahan, FL
Posts: 87
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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
gofastz is offline  
Reply With Quote
Old 03-25-2007, 07:58 AM
  #1367
Aero D
 
Aero D's Avatar
 
Join Date: May 2005
Location: Maitland FL
Posts: 74
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Thanks Mark.

How about some interior photos showing how you bolted on your wing?

Chris
Aero D is offline  
Reply With Quote
Old 03-25-2007, 12:47 PM
  #1368
Wayne22
 
Wayne22's Avatar
 
Join Date: Apr 2002
Location: Strathcona county, AB, CANADA
Posts: 5,391
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Quote:
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.
You might have had a pinch or twist in the pressure line. I had a pusher A-10 with the tank two feet in front of the engine and had no problems with the fuel feed.

But..the main thing is that you get a system that works for you..
Wayne22 is offline  
Reply With Quote
Old 03-25-2007, 03:23 PM
  #1369
Rodman63
 
Rodman63's Avatar
 
Join Date: Feb 2006
Location: Washingtonville, NY
Posts: 19
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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.
Rodman63 is offline  
Reply With Quote
Old 03-25-2007, 04:44 PM
  #1370
countryshooter
 
countryshooter's Avatar
 
Join Date: Oct 2005
Location: Clarksburg, NJ
Posts: 55
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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.
countryshooter is offline  
Reply With Quote
Old 03-26-2007, 12:13 PM
  #1371
rhklenke
 
rhklenke's Avatar
 
Join Date: Jun 2002
Location: Richmond, VA
Posts: 5,492
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

A few pictures of our maiden flight. It flew very well. It does tend to bounce easily on landing, and when it does, it drops a wing very quickly and then the nose drops...

No real damage in either case - my landing or my son's

Bob
Attached Thumbnails
Click image for larger version

Name:	Hf98876.jpg
Views:	9
Size:	136.0 KB
ID:	650426   Click image for larger version

Name:	Ni22713.jpg
Views:	8
Size:	93.0 KB
ID:	650427   Click image for larger version

Name:	Ze85587.jpg
Views:	12
Size:	25.6 KB
ID:	650428   Click image for larger version

Name:	Fy72598.jpg
Views:	12
Size:	99.3 KB
ID:	650429   Click image for larger version

Name:	Pa34049.jpg
Views:	10
Size:	113.1 KB
ID:	650430  
rhklenke is offline  
Reply With Quote
Old 03-26-2007, 12:21 PM
  #1372
afterburner
 
afterburner's Avatar
 
Join Date: Jun 2002
Location: New City, NY
Posts: 2,931
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Allright Bob! How does Louie like it? Can't wait to see him fly it.

Marty
afterburner is offline  
Reply With Quote
Old 03-26-2007, 01:22 PM
  #1373
rhklenke
 
rhklenke's Avatar
 
Join Date: Jun 2002
Location: Richmond, VA
Posts: 5,492
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default 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...
rhklenke is offline  
Reply With Quote
Old 03-26-2007, 01:40 PM
  #1374
afterburner
 
afterburner's Avatar
 
Join Date: Jun 2002
Location: New City, NY
Posts: 2,931
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?


Quote:
ORIGINAL: rhklenke


ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
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
afterburner is offline  
Reply With Quote
Old 03-26-2007, 01:45 PM
  #1375
rhklenke
 
rhklenke's Avatar
 
Join Date: Jun 2002
Location: Richmond, VA
Posts: 5,492
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Nitro models pusher Bobcat?

Quote:
ORIGINAL: afterburner


Quote:
ORIGINAL: rhklenke


ps. I removed the outer 1/3 of the wing on my Flash on a landing light yesterday... [:@]
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
No, actually it was a really nice flying day up in Fredericksburg. I was landing early to put some air in the retracts (Louie and I forgot to air-up before take off). I had a perfect landing flare going and had just touched down whem BAM! I had no idea I was that far out. I'll fly at that field again, but my landings are going to be MUCH closer in from now on!

Bob
rhklenke is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 02:57 AM.