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Bob Cat Copy Falcon 120 Jet

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Old 02-18-2012, 08:02 AM
  #4251
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Default RE: Bob Cat Copy Falcon 120 Jet

I installed my flaps with the old fashion Kavan Hinges, they are fitted near the top edge and I have as much movement as I want. I can get 110° with the servo no problem.

I fitted the flap horn further into the flap to give me more movement and I have the linkage at 90° to the hinge line, rather than at an angle like the servo, works much better pushing and pulling in a straight line.

Be interesting to how effective they are at 90° down?
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Old 02-22-2012, 04:45 AM
  #4252
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Default RE: Bob Cat Copy Falcon 120 Jet

Where have you guys got your batteries with a wren 54 size turbine, just to give me an idea for CG

Also meant to ask are you guys gluing permanently the tailplane to the booms?
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Old 02-22-2012, 05:40 AM
  #4253
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: Xairflyer

Where have you guys got your batteries with a wren 54 size turbine, just to give me an idea for CG

Also meant to ask are you guys gluing permanently the tailplane to the booms?

Nice job on the flaps. I was going to flip them over as BaldEagle did... but after I put on my fixed landing gear... I realized it wouldn't work. BUT... after I set up crow... it didn't mater. When I hit the flap switch (with crow)... it's like someone threw out a parachute!!! I have to use 1/4 throttle to keep it moving forward.

As far as the batteries go... I have a very heavy AT-180 on mine, and the batteries are in the nose. With the Wren... I'm going to assume that your batteries will be either in the section where the nose gear is... or even on the servo tray, under the canopy.
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Old 02-22-2012, 06:51 AM
  #4254
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Default RE: Bob Cat Copy Falcon 120 Jet

I have a Wren SS on mine (same weight as a 54). To get the proper CG my batteries ended up at the nose wheel well. Of course there are a lot of variables that can influence that, so YMMV.

Joe

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Old 02-22-2012, 09:27 AM
  #4255
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Default RE: Bob Cat Copy Falcon 120 Jet

For the new guys, just coming into the Falcon group... Todd at DreamWorks sells my motor mounts now.


Here are the 0 degree mounts. (what I use)

http://dreamworksrc.com/catalog/falc...ee-p-2405.html

Here are the 5 Degree mounts that most of the guys here use.

http://dreamworksrc.com/catalog/falc...ee-p-2406.html



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Old 02-22-2012, 10:04 AM
  #4256
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Default RE: Bob Cat Copy Falcon 120 Jet

VERY nice!!!!
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Old 02-22-2012, 04:17 PM
  #4257
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: Xairflyer

My elevator mod, went with one servo in the tailplane like I done with the bobcat.

Very simple to do if using a moulded servo cover. I used a spare one from a Boomerang Elan.

I just cut away the film, glued in four wooden blocks in the corners and screwed down the servo cover, job done very simple.
I fitted it to the bottom of the tailplane so I wanted as much burn proof as possible so made up two alum horns, metal ball link and 3mm rod. Then covered the complete bottom of the tailplane with alum tape.

After I had the job done, I thought I could have also fitted it to the top of the tailplane, with the moulded servo cover it would have looked ok, as my idea initially was to take it out of view.
On the top would have made fitting the alum tape to the bottom easier. Will do that on the next one.


Is the servo mounted to the cover, then the cover attached to the airframe? Or is the servo mounted directly to the airframe?


Thanks,



-Dave
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Old 02-22-2012, 04:38 PM
  #4258
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: Dave Wave


Is the servo mounted to the cover, then the cover attached to the airframe? Or is the servo mounted directly to the airframe?


Thanks,



-Dave
Yes servo is mounted to cover as shown in middle picture then screwed to blocks glued into tailplane.
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Old 02-23-2012, 07:23 AM
  #4259
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: Xairflyer


Quote:
ORIGINAL: Dave Wave


Is the servo mounted to the cover, then the cover attached to the airframe? Or is the servo mounted directly to the airframe?


Thanks,



-Dave
Yes servo is mounted to cover as shown in middle picture then screwed to blocks glued into tailplane.
What sort of glue did you use to glue the wood blocks to the cover? Are you worried about the blocks breaking free from the cover and the servo being loose in the pocket?

-Dave
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Old 02-23-2012, 04:59 PM
  #4260
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Default RE: Bob Cat Copy Falcon 120 Jet

The blocks are only spacers the cover is a moulded servo mount as used on all the Boomerangs
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Old 02-25-2012, 11:17 PM
  #4261
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Default RE: Bob Cat Copy Falcon 120 Jet

Hey Guy's

It's been a while since I posted here but I just thought I'd show you some pic's that got taken of my falcon 120 last weekend still going strong!!

Plenty of flights on her now and she is approching 2 years old. There was a guy at my local club who wanted some practice at taking pictures of fast moving object so he can break into the racing car picture taking market. I tried my best to oblige

Thanks

dave
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Old 03-07-2012, 11:41 AM
  #4262
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Default RE: Bob Cat Copy Falcon 120 Jet

With RCU playing up I had forgotten to post some more pics of the build

My simple engine mount folded out of two bits of 2mm aluminium, and given a coat of etch primer then paint.

I looked/tried different methods of attaching the wing, I found it difficult to get at the bolts in through the hatch, so I just made up some spacers out of dowel and used the thumb type nylon bolts, now very easy to reach just inside the hatch to screw them in or out.
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Old 03-07-2012, 11:58 AM
  #4263
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Default RE: Bob Cat Copy Falcon 120 Jet

Canopy, real pain finding a method of fitting it, everyone has a different method, dont think even the "turbine modified" varients of this aeroplane have a decent canopy fit.

What I done was to cut out a piece of 1/4" balsa that fitted just inside the fuselage (spaced it up slightly from the formers), once I was happy with the fit I glued two side rails out of 3/8 x 1/4 hard balsa strip, notching them to allow for the curves.
Then I was able to add a tongue at the front as easy to see how much needed to hold it in place.

This whole thing was still inside the outer edge of the fuselage so I glued on 5, 1/4" hardwood blocks each side, where I wanted to fit the screws for the canopy, then just trimmed them (cut corners off etc) so the canopy just dropped over them.

With some blue foam carved for the seats etc and the whole thing painted black, the canopy is screwed to the base just with the five screws each side.

Back of the canopy held with a 5mm screw, block/captive nut glued inside fuselage with hysol.
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Old 03-07-2012, 02:42 PM
  #4264
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Default RE: Bob Cat Copy Falcon 120 Jet

I like to see some make your own stuff ... nice canopy ....

Scott.
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Old 03-07-2012, 11:58 PM
  #4265
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Default RE: Bob Cat Copy Falcon 120 Jet

Did any of you notice that HobbyKing look like they are going to stock this plane
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Old 03-08-2012, 04:04 AM
  #4266
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Default RE: Bob Cat Copy Falcon 120 Jet

yep. They announced it about 3 months ago. But knowing HK... they may not ever get it.
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Old 03-08-2012, 06:49 AM
  #4267
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Default RE: Bob Cat Copy Falcon 120 Jet

I have used Eflite electric retracts, using the 5mm wire for the mains for now, but a wire leg dosnt really work for the noseleg due to the size of the cut out needed so I made my own trailing link.
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Old 03-08-2012, 07:38 AM
  #4268
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Default RE: Bob Cat Copy Falcon 120 Jet

Nice. I made my own front leg too, and it's WAY beefyer than needed. But, at this point, if I make it a little thinner... then I will have to add weight to the model to keep it balanced.


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Old 03-12-2012, 03:13 AM
  #4269
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Default RE: Bob Cat Copy Falcon 120 Jet


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Old 03-12-2012, 03:14 AM
  #4270
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Default RE: Bob Cat Copy Falcon 120 Jet

Hi guys i thought i might share my build with you,falcon 120 stripped of all film everything glassed except fuselage,retract mounts strengthened,all formers removed and replaced to my specs,2 servo trays to accommodate internal electronics and futaba 8 ch receiver,2.1ltr conformal tank,all servos ds 821 with the elevator servo being jr8411 are recessed in wings ,booms and stabilizer , landing gear pro lynx with airpower brakes,turbine kingtechK80F mounted on custom engine mount with 7 degree down thrust,airframe painted with acrylic paint and finished with clear coat
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Old 03-12-2012, 03:22 AM
  #4271
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Default RE: Bob Cat Copy Falcon 120 Jet

Hey guys I was at Florida Jets and was talking with Henry from Modellbau and he mentioned that he was going to be manufacturing a conversion kit for all Falcon 120 with His Tornado V3 Wings, composite Booms and Stabilizer. Thought you guys would like to know. I saw the new V3 fly and it was a rock never broke once on that horrible grass and it handled that new rabbit 100 at wide open throttle with no problem.

Just my 2 cents

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Old 03-12-2012, 04:45 AM
  #4272
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Default RE: Bob Cat Copy Falcon 120 Jet

Jedda: How about some pictures???


David: Cool. Hope the wing and boom prices are reasonable.
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Old 03-12-2012, 09:14 AM
  #4273
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Default RE: Bob Cat Copy Falcon 120 Jet

The Falcon was collected today, so another jet finished !

Very pleased how it turned out, weight was 14lb 3ozs so should go well with the 14-15lb wren.

Added some orange decals to match the covering and it looks fairly smart I think, cheap practical Jet.

Some pics below of the install, not my normal painted trays etc but adequate for the job. Not a fan of "pulling bits of string" for the nosewheel steering but did'nt have much choice with the installation.

The two small tanks are a home made Bubble trap on the right and a vent/taxi tank on left. Normally we mount the vent tank vertical but just installed it to match the bubble trap The vent tank allows you to over fill the main tank and use up what is in the vent tank for startup and taxi then have the full tank for the flight.
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Old 03-12-2012, 10:46 AM
  #4274
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Default RE: Bob Cat Copy Falcon 120 Jet

I guess news travels fast yes we are making a conversion kit for the all the Flacon 120's that are out there. The Conversion Kit will be our New Tornado V3 Wings, Composite Booms and Stabilizer. The wings are heavly reinforced with ply cross bracing through out the wing as well as tons of Carbon Fiber as well as double ply landing gear mounts as well as fully sheeted. The Booms are full Composie and are again Ply Support and tons of Carbon Fiber reinforcement. The elevator is fully sheeted built up with Double ply cross bracing and Carbon Fiber. Also all the servo's are mounted inside of the wings and booms. We have aquired a Falcon 120 and have made sure it will fit correctly. I dont have a exact price yet but we will make it as reasonable as possible for people to convert there old falcons or new ones that they have not yet built into a new rock hard machine. Out Version 3 Tornado with the same wings and booms are flyoing well over 200+ miles per hour and have been out through tremendous stress with no problems. They handle a 23lb thrust turbine with no problem. Below are some pictures of what the internals look like of the wings and Booms we are using on our Tornado.

One thing I do ask from everybody out there is to what color scheme to make these parts for you or none at all. We can get you wings and Stabilizers unconvered and Booms unpainted?
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Old 03-12-2012, 11:02 AM
  #4275
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Default RE: Bob Cat Copy Falcon 120 Jet

I wonder if the Tornado wings will fit the Falcon 120 fus and if so why
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