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RE: Bob Cat Copy Falcon 120 Jet - 11/16/2007 12:43 AM   
joeflyer



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From: Plymouth, MI, USA
Status: offline 		Brian,

I asked that same question a while back. The short answer is it's a pain with assembly/disassembly and all of the servo/air comnnections. Some guys leave the booms attached to the wings. I'm going to try keeping the booms & stab assembled and then attach them after the wings are on. It would be a whole lot easier if it were designed like the BVM Bobcat, where just the wing panels outboard of the booms need to come off.

See page 20 in this thread for responses.

Joe

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RE: Bob Cat Copy Falcon 120 Jet - 11/16/2007 12:45 AM   
TUMBLER


 

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From: Williamstown, NJ, USA
Status: offline 		Thanks! yeah I would think itys easiest to leave the booms on the wings and unscrew one side of the stab and slide the wings off.

Brian

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RE: Bob Cat Copy Falcon 120 Jet - 11/16/2007 12:54 AM   
joeflyer



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Status: offline 		Perhaps. My reservation is that the wing/boom assemblies will be awkward to handle and transport. I made a support out of styrofoam to keep the front of the booms evenly spaced during transportation and assembly. I'll probably try both ways to see which works out best for me. Mine should be ready to maiden in a few days, weather permitting.

Joe

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RE: Bob Cat Copy Falcon 120 Jet - 11/16/2007 7:10 AM   
joeflyer



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From: Plymouth, MI, USA
Status: offline 		I CAN'T BELIEVE IT !!!

I tried to see if I could get my assembled Falcon into the back of my Ford Expedition, and it fits.
With the back seats folded down and the plane angled just right I got it in. That will make life easier. Now I have to find room in the basement to store it with the wings and booms on.

Joe

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RE: Bob Cat Copy Falcon 120 Jet - 11/16/2007 6:23 PM   
TUMBLER


 

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Status: offline 		Joe,

Thats awesome! Yoi're lucky. Can you do me a favor? Could you please measure the distance from the back of the turbine to the tip of the nose. i want to see if it will fit in my truck with the wings on and booms off.

Thanks,

Brian

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RE: Bob Cat Copy Falcon 120 Jet - 11/17/2007 1:43 AM   
joeflyer



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Status: offline 		Brian,

From the nose to the end of the turbine tailcone is 54.5 in. The wing tips, however, extend a bit further back. From the nose straight back to even with the wing tips is 57 in. If you have a full sized truck it would probably fit in if angled.

Joe

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RE: Bob Cat Copy Falcon 120 Jet - 11/17/2007 1:55 AM   
joeflyer



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Status: offline 		I'm still working on the canopy attachment, otherwise mine is ready to go. The weather forcast isn't that good for tomorrow, maybe I'll be able to maiden it Sunday. Even if I'm not done I can always tape the canopy on for the first flights.

Here is how I have it set up:

CG - 330 mm. or 13 inches
Aileron - Aileron +/- 22 mm. high; +/- 18 mm. low
Flap - partial 25 mm.; full 80 mm. (about 40 degrees)
Rudder - +/- 15 mm. high; +/- 12 mm. low
Elevator - +/- 20 mm. high; +/- 15 mm. low

Here's a few pictures.

Joe




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RE: Bob Cat Copy Falcon 120 Jet - 11/17/2007 5:27 PM   
Bensonrj


 

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From: Jupiter, FL, USA
Status: offline 		TIM777JET,

Thank you for the immediate response to my e-mail concerning my Falcon-120. the information has pointed me in the right direction as I start this project, and is greatly appreciated.

Rick Benson

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RE: Bob Cat Copy Falcon 120 Jet - 11/18/2007 11:54 AM   
bigplumbs



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From: England, , UNITED KINGDOM
Status: offline 		This is a lovely lookig jet and an excellent first jet trainer. I have had 5 flights on mine now with the Wren 54 and it flys a dream. I kwwp the booms on the wings and remove the wings takes about 15 mins to put together at the field

Dennis

www.densplanes.co.uk

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RE: Bob Cat Copy Falcon 120 Jet - 11/19/2007 4:28 AM   
ubirajaramarques


 

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From: belem, BRAZIL
Status: offline 		Did anybody fly this jet with a turbine and the original fixed gears? I wouldnt like to put retracts but im afraid that the wings doesnt support the fixed gears during the lanfings. It seems to be not strong.
Thanks

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RE: Bob Cat Copy Falcon 120 Jet - 11/19/2007 9:55 AM   
bigplumbs



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Status: offline 		This wing is very strong all you have to do is apply some 30 min epoxy around the gear mounting blocks and it is fine. With flaps deployed this plane will land very slow and gentle

Dennis

www.densplanes.co.uk

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RE: Bob Cat Copy Falcon 120 Jet - 11/19/2007 2:21 PM   
ubirajaramarques


 

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From: belem, BRAZIL
Status: offline 		Hi bigplumbs. Do you have pictures of the instalation of the fixed landing gears inside the wings to post here? Thanks

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RE: Bob Cat Copy Falcon 120 Jet - 11/19/2007 11:18 PM   
wildnloose


 

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From: Owasso, OK, USA
Status: offline 		I finally saw one of these in person. Me likey lotty.....really want one. The owner was using a os 120 ax for power. It did not fly (retract problem) but the thrust from the 12o seems adequate. I have a ys 140 just laying around, may have to get one of these and wait for the turbine.

It seems to be well built, with one exception.....the booms. These things scare me. They attach to the top of the wing with plastic screws...not good. There is another guy with the .50 sized falcon (os 46) and he broke one of the plastic screws in flight. I really doubt they will hold up to my style of flying, yet alone a turbine... Looking at some of the videos out there I am surprised none of your elevators have separated in flight...

So, is this a legitimate concern?? or is it much ado about nothing?? I would like to hear what others think about it. How do u secure those booms???

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RE: Bob Cat Copy Falcon 120 Jet - 11/20/2007 12:46 AM   
Speny


 

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From: Preston, UNITED KINGDOM
Status: offline 		Within this thread there have been many precautionary mods to the original kit.
The upgrading of wing bolts has been addressed by most builders, including myself, and we have already swapped these out for steel bolts.

Im planning on using OS 160 in the 1st instance and just waiting for some flight reports from others with this motor.

So guys, any OS 160 flight reports yet???


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RE: Bob Cat Copy Falcon 120 Jet - 11/20/2007 3:33 AM   
wildnloose


 

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quote:

ORIGINAL: Speny

Within this thread there have been many precautionary mods to the original kit.
The upgrading of wing bolts has been addressed by most builders, including myself, and we have already swapped these out for steel bolts.


Yeah, I saw that....but I wonder if its enough (i.e.-structually sound)...

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RE: Bob Cat Copy Falcon 120 Jet - 11/21/2007 1:44 AM   
joeflyer



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Status: offline 		Just got back from doing the maiden flight on my Falcon 120. Once I got it trimmed out it was very easy to fly. I ended up using low rates for both ailerons and elevator. It definitely needs more than 25 mm. flaps because it floated quite a ways on landings.

The second flight went better since it was pretty well dialed in. It's very stable and flys like a trainer. Top speed with my Artes Bee (12# thrust) was about 120 mph and it had a decent climb rate. But it's still a little slow for me. 14# thrust would be ideal.

Overall I am pleased with the plane.

Joe

< Message edited by joeflyer -- 11/21/2007 2:37 AM >

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RE: Bob Cat Copy Falcon 120 Jet - 11/21/2007 3:36 AM   
3DnSD


 

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From: Kerny Mesa, CA, USA
Status: offline 		How did your awesome design engine mount work out?

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RE: Bob Cat Copy Falcon 120 Jet - 11/21/2007 5:39 AM   
joeflyer



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Status: offline 		The engine mount works fine. I had confidence in it since I made a similar one for my Turbine Enforcer and it has held up for over 180 flights so far.

Joe

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RE: Bob Cat Copy Falcon 120 Jet - 11/26/2007 7:18 AM   
joeflyer



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Status: offline 		As I said in my 11/20 post, I thought it was a bit slow with the Artes Bee. So I installed my brand new Wren SS and flew it today. Since I wasn't sure how strong the airframe is I dialed it down to 14# thrust. What a difference! Top speed is maybe 150 mph. I'll have to get use to the plane before dialing in any more thrust. I think the full 18 lbs. might be too much for it.

It was cold and overcast out so I put on only one flight. It's snowing this evening and the weather forcast looks crappy for the next week. Looks like flying season is over. Probably won't get another chance to fly it before April.

For those that are interested here's a couple of shots of how I did the canopy. It seems to work well, easy on and easy off.

Joe

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< Message edited by joeflyer -- 11/26/2007 7:24 AM >

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RE: Bob Cat Copy Falcon 120 Jet - 11/27/2007 12:23 AM   
Speny


 

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From: Preston, UNITED KINGDOM
Status: offline 		I was speaking to the British importer of these at the trade show in Harrogate this weekend and he advises that they are bringing out a much strenghened version of this bird specifically for turbines! I asked while they were strengthening it, whether they were going to alter the boom design, and he didnt think so. No knowledge of a bigger version though.

Anybody flown with OS 160 yet??

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RE: Bob Cat Copy Falcon 120 Jet - 11/27/2007 4:01 AM   
ubirajaramarques


 

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From: belem, BRAZIL
Status: offline 		Does anybody use spring air retracts? What series?
thanks

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RE: Bob Cat Copy Falcon 120 Jet - 11/27/2007 10:36 PM   
Jetpilot24


 

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Status: offline 		Here are a couple of pics of my mount. It is 1/16th aluminium 2 inch angle cut down. It has 5 degrees of downthrust in it.

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RE: Bob Cat Copy Falcon 120 Jet - 11/29/2007 1:07 AM   
tim777jet


 

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From: Maidenhead, UNITED KINGDOM
Status: offline 		During a start sequence recently, my ECU saw the accu voltage drop below a set level, (rpm was around 6,000 rpm and EGT rising, so the ECU aborted the start sequence. There must have been a small pooling of fuel in the chamber, so the flame continued to burn as the engine was running down. The ECU obviously didnt want to re-engage the starter motor, until the rpm was down to about 1000 rpm for a cool down cycle, so what to do, just wait? Give it a blast with my industrial fire extinguisher?
I was going to make up a seperate starter motor and wand assembly to engage on the side of the spinner to turn the engine over to blow out any residual flame and help cool the engine, should this happen again. Too complex and another battery to carry around.
Well had a thought and went to my local cycle shop, bought a tyre inflator, with precise trigger operation. These devises are good for inflating cycle, motor bike or car tyres with CO2 disposable cyclinders. Cost was 14 pounds.
Gave it a test today, had the same thing happen at around 6000 rpm, (bit cold here tonight), gave the intake a 1/2 second blip on the trigger, flame extinguished immediatly. This tool is easy to use, has a safety lock on the trigger and can take threded or non threaded CO2 cylinders, and more convenient to use than the large industrial bottles. I bought a set of adaptors, for footballs and different types of valves, for £3.50 and used the plastic adaptor (orange nozzel). Might be usefull in your field box.
Cheers Tim

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RE: Bob Cat Copy Falcon 120 Jet - 11/29/2007 11:37 AM   
jescardin


 

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From: Talamanca de JaramaMadrid, SPAIN
Status: offline 		Tim, congratulations on your discovering!. An excellent option for those small fires, indeed.

I will check for them here in Spain.

Best Regards,

Jesus Cardin

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RE: Bob Cat Copy Falcon 120 Jet - 11/29/2007 12:10 PM   
erazz



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From: NA, NJ, USA
Status: offline 		Excellent! Will certainly cost less than refilling the halon extinguisher

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