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Bob Cat Copy Falcon 120 Jet

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Bob Cat Copy Falcon 120 Jet

Old 09-11-2019, 09:20 AM
  #5001  
john491
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Look into the wing through one of the holes in the root and see which way the shear web is installed. They should be vertical. Some of the early ones had webbing installed with the grain horizontal. It's pretty much a total rebuild of the wings if they are wrong.
There are a couple of sources for fuel tanks made specifically for the Falcon. Pretty much have to remove all the rear formers to get it in but they fit.
Some needed the motor platform reinforced, I didn't on mine.
They fly fairly well if balanced properly, a lot of fun.
I'm using a P-60 on the version I'm flying.
John
Old 09-11-2019, 01:36 PM
  #5002  
alasdair
 
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My first Falcon 120 was 60 powered (a Wren 54 Mk3 rated 63N, 14 lb). That was perfectly adequate for a good performance and manoeuvrability.
I used the KISS principle: fixed gear, big battery well forward and no ballast, standard servos, single large glass fibre tank (made myself, 2.2 litre).
The only reinforcing I did was a little epoxy mixer with Kevlar fibres around the blind nuts that held the booms to the wings, and I changed to steel bolts.
I shortened the legs to reduce stress on the mountings.
The weight was about 6 kg, 13 pounds.
My first eventually hit a fence. My second one (still in box) will be similar.
Old 09-11-2019, 03:35 PM
  #5003  
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Originally Posted by Kim Couturier View Post
Wow, long thread! I have a question. I have a chance to pick up a red falcon 120. It does not appear to be carbon fiber reinforced. I have no skills that would allow me to do ď modsĒ to the kit for turbine use. I have read several threads that say you can, in fact, fly these without the mods if you keep the power to a 60 size turbine, and donít fly at full throttle for extended time, or when turning the jet at speed. What do you guys think? Iíve had a couple before, and they were a nice , small jet I could haul in my Durango and not have to pull my trailer....good off my local grass field...my other jets are bigger, and composite. I would appreciate any feed back...
Hello Kim,
I am on my 6th Falcon 1.20 and I love them. All have been the gen 1 or 2 (no carbon fibre) and I have found that at the minimum you will have to reinforce/re-glue the u/c mounts. I have photos of the process somewhere in this forum. My first Falcon had no mods done, was fitted with a Kingtech K80 and electric retracts. The second landing (not hard) resulted in the left hand main coming out of the wing, bearers and all. Inspection of the other side showed that the flour and water glue they used was about to let go as well. After fixing that problem and replacing the 22mm wing joining tube (original too short) it went on to have 70+ flights before I sold it to buy another.

Since number 2 and beyond I do the following with each new Falcon before flying.
1. Do the u/c bearer mod. (at the same time I change the angle of the bearers to allow fitting of trailing arm u/c legs,, note trailing ARM not trailing link,,, )
2. Measure the exact length of wing joiner tube required and replace the original.
3. Remove/reshape rear fuse formers to accept after market conformal fuel tank (2.6l)
4. If the wings are open bay structure I remove the covering and fully sheet them. (It is my personal choice to do so.)
5. Throw away all nylon wing/boom bolts and replace with steel.
6. I also fit the flaps upside down and surface hinge them to give added deflection.

You don't need to do most of these if you don't want but I suggest you re-glue the u/c bearers as a minimum.

Regards
Col
Old 11-19-2019, 01:29 AM
  #5004  
BashaBolla
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Default Falcon 120 on a 45N Turbine ?

I have a Falcon 120 with a Wren 80 on the back. It goes like stink and is a joy to fly. Problem is I want the engine ( and the heavy Electron retracts and brakes )for another plane .
I have a new Xicoy X45 that I am thinking of using on the Falcon. I will use some light cheapo HK retract units and some wire legs with no brakes to save weight . Fuel tank is currently a 2L pop bottle but will be substituted for a 1L bottle to save weight
Has anyone flown one of these on a 45N turbine ?
Old 11-19-2019, 08:08 AM
  #5005  
Terry Holston
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Originally Posted by BashaBolla View Post
I have a Falcon 120 with a Wren 80 on the back. It goes like stink and is a joy to fly. Problem is I want the engine ( and the heavy Electron retracts and brakes )for another plane .
I have a new Xicoy X45 that I am thinking of using on the Falcon. I will use some light cheapo HK retract units and some wire legs with no brakes to save weight . Fuel tank is currently a 2L pop bottle but will be substituted for a 1L bottle to save weight
Has anyone flown one of these on a 45N turbine ?
I don't know where in the world you are, but if you are in the US you need to keep the brakes to be in compliance with AMA rules. Just a heads up . As to if the 45 will fly it I see no reason why not. It will be lighter with the 45 and brakes won't add that much weight.
Have fun.
Old 11-19-2019, 08:41 AM
  #5006  
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Thanks Terry...not in the US so no need for brakes :-))….I too can see no reason why not ..the X45 is really light and I think ,with the reduced weight, the package should be good....was just wondering if anyone actually flies one of these with a 45 ? ( reality as opposed to theory
Old 11-20-2019, 11:31 PM
  #5007  
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Not an X-45 but a friend flew one with a Wren 44 Gold turbine.

Not a wonderful result, the Falcon 120 is a big, draggy aircraft & it had to fly at high throttle
settings to make headway & was a slow upwind, fast downwind model. While it was light
it would waft around & not fly jet like at all. At least take off & landing speeds were low.

He only flew it twice & bent the crappy standard wire undercarriage legs on the second landing.
At this point he lost interest in it, removed the gear & engine & gave it away.
Old 11-21-2019, 07:01 AM
  #5008  
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Thanks Boomerang......food for thought !!
It is quite a "slippery" airframe with the Wren80 installed....fast and takes quite a bit of slowing down ..I tend to fly on about 1/2 throttle most of the time unless I want a bit of an adrenaline rush :-) ...but I too fear I may have to give it max beans all the time with just a 45 …..and I really don't want it wobbling about in the air and struggling like the old IC Ducted Fans used to.. ..so..perhaps this will be one idea I should shelve !
Old 01-23-2020, 07:24 PM
  #5009  
warhog
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Which
version of the Super Falcon 120 has solid red covering on top and completely white covering on the bottom?
Old 05-28-2020, 07:12 PM
  #5010  
Dkat
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Thumbs up Need info help with Falcon 120 plz....

Originally Posted by seanreit View Post
It's a bit small for my taste.
Hi I recently acquired a falcon120 from an auction and have never worked on an R/C plane and was hoping you may be able to help me identify the parts and see what maybe missing or if it is worth messing with. I would appreciate any help you are willing to give, Thanks for your time in advance. Dell Howard (Dkat)
Old 05-28-2020, 07:58 PM
  #5011  
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Originally Posted by Dkat View Post
Hi I recently acquired a falcon120 from an auction and have never worked on an R/C plane and was hoping you may be able to help me identify the parts and see what maybe missing or if it is worth messing with. I would appreciate any help you are willing to give, Thanks for your time in advance. Dell Howard (Dkat)
It isn't really the right airframe for a first time builder/flyer but if you post pictures of what you have we may be able to help out.

Col
Old 05-28-2020, 10:33 PM
  #5012  
Dkat
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Default You are right about the level of it....

I tried to list everything that had came with the model and am sending it to you. I wish I knew more but having to learn as I go and don't know if this is worth the time and expense to pursue...

I hope this attached so you can see it, if not let me know and I will redo......Thanks
Attached Files
File Type: doc
Falcon 120 Item List.doc (27.0 KB, 16 views)
Old 05-28-2020, 11:35 PM
  #5013  
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Originally Posted by Dkat View Post
I tried to list everything that had came with the model and am sending it to you. I wish I knew more but having to learn as I go and don't know if this is worth the time and expense to pursue...

I hope this attached so you can see it, if not let me know and I will redo......Thanks
That is a pretty good list. The only thing you might be missing are the large and small aluminium wing joining tubes. 22mm and 10mm if I remember. You have a lot of extras there that didn't come with the original kit. If you didn't pay too much then you have a good deal.
The model itself though is not suitable for a learner pilot or builder.
Here are some of my 1.20s





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