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Bob Cat Copy Falcon 120 Jet

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Old 12-10-2010, 10:43 PM
  #3901
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Default RE: Bob Cat Copy Falcon 120 Jet

Got a pic of an Orbit Clunk some one.
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Old 12-12-2010, 10:07 AM
  #3902
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Default RE: Bob Cat Copy Falcon 120 Jet

Dear Joe Flyer.

I have a question regarding the Prolink gear system that you installed in your Falcon. Did you use the rail mount or the firewall mount retract for you NLG. Thank you in advance.

****
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Old 12-17-2010, 07:55 PM
  #3903
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Default RE: Bob Cat Copy Falcon 120 Jet

This saddle for the forward wing tube allows the tank to go all the way to the bottom of the fuselage. and this engine mount allows fro a stable platfotm for the turbine. I am going to use a Dubro 50 oz tank with another 16oz round tank on top of it. With the UAT i will have 70oz.

Mitchell
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Old 12-18-2010, 05:18 AM
  #3904
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Default RE: Bob Cat Copy Falcon 120 Jet

Pepperpete

The video or link of the clunks in flight

A link please
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Old 12-18-2010, 06:00 AM
  #3905
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: ****sheee

Dear Joe Flyer.

I have a question regarding the Prolink gear system that you installed in your Falcon. Did you use the rail mount or the firewall mount retract for you NLG. Thank you in advance.

****
I have Robart retracts with Prolink struts in mine. The nose retract is rail mount. I made all new formers and mounts and designed it so that the nose gear would be completely inside the fuse when in the up position. I'm sure you could make either type of retract work. If you use the original mounting it would have to be rail mount.

Joe
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Old 01-08-2011, 03:07 AM
  #3906
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Default RE: Bob Cat Copy Falcon 120 Jet

hello
I have a falcon-120 with a pusher prop . i am using a 14*7 pusher prop 3 bladed. i use a os 1.08 engine on it . i have no problem with prop hitting the runway on rotation
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Old 01-08-2011, 03:18 AM
  #3907
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Default RE: Bob Cat Copy Falcon 120 Jet

Hello

I suggest you use a os 1.40 rx with pump on it and then u can use a 15*10 or suitable 3 bladed propeller on it . exceeding 15 inches will be tricky on landings and takeoffs. you may find yourself always trying for 3 point landings .

you can watch my first flight on you tube . just type jitendra gurjars falcon-120 test flight
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Old 01-08-2011, 09:41 AM
  #3908
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: BaldEagel

Sorry to dissagree but any over rating is just the new 100%.

Mike
Maybe you can get a job rewriting a ton of operating manuals for full scale jets and turboprops.
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Old 01-09-2011, 01:07 AM
  #3909
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Default RE: Bob Cat Copy Falcon 120 Jet

thanks for video!
Is it an ASP or O.S engine?

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Old 01-09-2011, 01:12 AM
  #3910
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Default RE: Bob Cat Copy Falcon 120 Jet

.
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Old 01-09-2011, 07:06 AM
  #3911
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Default RE: Bob Cat Copy Falcon 120 Jet

well no its a os 1.08 engine
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Old 01-09-2011, 09:09 PM
  #3912
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Default RE: Bob Cat Copy Falcon 120 Jet

Can anybody tell me what they used for neutral position on the elevator. It looks to me like it would be set flat on the bottom.

Mitchell
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Old 01-10-2011, 03:39 AM
  #3913
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Default RE: Bob Cat Copy Falcon 120 Jet

Mitch
That is a good starting point for the Elevator. I found that I had to give it 3 to 4 clicks of up trim on the first flight. That may have just been a balance thing though

Good Luck
Joe
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Old 01-10-2011, 03:47 AM
  #3914
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Default RE: Bob Cat Copy Falcon 120 Jet

Mitchell

Safer to have it level on the upper surface of the tailplane then at least you have not got to hold on down after a to enthusiastic take off, that's how I had mine set and it did not need any up trim in flight, but I did have my turbine set level.

Mike
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Old 01-10-2011, 02:37 PM
  #3915
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Default RE: Bob Cat Copy Falcon 120 Jet

BaldEagel....

My Jet is more or less done, but it's too cold to fly. (and get my waiver) By any chance, can you post a pic of the elevator? I understand that guys are making the top surface flat, and it makes it look like it's going up... but I'd like to see how much.

Thanks
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Old 01-10-2011, 03:58 PM
  #3916
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Default RE: Bob Cat Copy Falcon 120 Jet

I don't have the Falcon any more, I was offered silly monies for it and it went to one of our a club members, but what I did was put a straight edge on the tailplane and moved the elevator up to the straight edge to get it level, I still have one NIB and am very tempted to get into flying condition with my JetsMunt Merlin 90 should be fun with that much power.

Mike
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Old 01-10-2011, 11:39 PM
  #3917
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: Mitchell-RCU

Can anybody tell me what they used for neutral position on the elevator. It looks to me like it would be set flat on the bottom.

Mitchell
Flat to bottom is way off. Flat to top using a strait edge.
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Old 01-12-2011, 09:34 AM
  #3918
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: BaldEagel

I don't have the Falcon any more, I was offered silly monies for it and it went to one of our a club members, but what I did was put a straight edge on the tailplane and moved the elevator up to the straight edge to get it level, I still have one NIB and am very tempted to get into flying condition with my JetsMunt Merlin 90 should be fun with that much power.

Mike

OK... thanks.

So... anyone who has one flying... can you please post a pic of the elevator?
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Old 01-15-2011, 07:05 PM
  #3919
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Default RE: Bob Cat Copy Falcon 120 Jet

Ok Just finishing up my Falcon. I have a 90oz tank and a RAM 500. Are you guys balancing it with the uat full and the fuel tank empty?

Mitchell
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Old 01-15-2011, 08:25 PM
  #3920
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Default RE: Bob Cat Copy Falcon 120 Jet



This is what my elevator looks like at neutral.

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Old 01-15-2011, 10:51 PM
  #3921
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Default RE: Bob Cat Copy Falcon 120 Jet

Dave that is a lot of difference from flat on bottom. Do you have any down thrust in your engine? How did you balance yours?

Mitchell
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Old 01-16-2011, 03:06 AM
  #3922
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Default RE: Bob Cat Copy Falcon 120 Jet

Balance with full UAT
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Old 01-16-2011, 04:40 AM
  #3923
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Default RE: Bob Cat Copy Falcon 120 Jet



Yes I am using 0 degrees on my turbine, but that has no bearing on my neutral elevator setting. If I was to fly at any speed, and kill the engine, this is where the elevator neutral would be. You should have a look at the following link to my earlier description of how I setup my turbine at 0 degrees though. It really works great for the following reasons.

    [*]Does not burn the grass at my field[*]Does not need the longer nose gear to allow rotation. Since at take off with full power on the turbine the nose is not being pushed into the runway, I have a nice smooth rotation at about 60’.[*]With the shorter nose gear, I have only a slight positive incidence and not the normal tendency to bounce on landings. I expect that the reflex also helps on this.[/list]
    http://www.rcuniverse.com/forum/fb.asp?m=10143421

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Old 01-16-2011, 06:42 AM
  #3924
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Default RE: Bob Cat Copy Falcon 120 Jet

Quote:
ORIGINAL: f6hlct



This is what my elevator looks like at neutral.


Thanks !! As they say... a picture is worth a 1000 words.

So, the way I see it is... "The top elevator control surface should be perpendicular to the bottom elevator fixed surface."

Now I can finish rigging my Falcon.


FYI... I also have my engine set at 0 deg, on your recommendation.


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Old 01-18-2011, 09:55 AM
  #3925
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Default RE: Bob Cat Copy Falcon 120 Jet

Are the machined engine mounts available for the Falcon? If so, where and what is the price?
Thanks,
Jim
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