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Bob Cat Copy Falcon 120 Jet

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Old 12-24-2012, 04:14 AM
  #4501
Xairflyer
 
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: BORLEX

Do you know a Falcon 120 retailer in Europe?

Lindinger in Austria was selling it at €199 with free shippng in Europe, but they are out stock.

Also a reliable Chinnese retailer that ships to Europe is welcomed.

Colchester Models in UK stock the Falcon and Navycat versions
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Old 12-24-2012, 07:16 AM
  #4502
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Default RE: Bob Cat Copy Falcon 120 Jet

Then why do FPV flyers recon its good well most. My FPV flights are AOK readings. and rely on them, after all its still the readings from a GPS install.
I to use both Pitot and GPS speed datta, is one better or not, Full size use's gps or is it because they have BIGGER gear.

PS my ET gear is about 6 months old.

Cheer's and Merry Xmas to you ALL.
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Old 12-24-2012, 07:47 AM
  #4503
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Default RE: Bob Cat Copy Falcon 120 Jet

Quote:
ORIGINAL: CrocEnd

Then why do FPV flyers recon its good well most. My FPV flights are AOK readings. and rely on them, after all its still the readings from a GPS install.
I to use both Pitot and GPS speed datta, is one better or not, Full size use's gps or is it because they have BIGGER gear.

PS my ET gear is about 6 months old.

Cheer's and Merry Xmas to you ALL.
GPS data is normally very accurate in regards to its positional information. Height and speed, not so good. GPS info can only calculate ground speed not IAS, which is actually how fast you are flying.

Full size use pitot/ static systems which feed that info into INS. This then checks and correlates INS data with GPS data to confirm that it's still accurate, but only for positional information. Airspeed and alt come directly from the pitot/static system. I do not know of any full sized A/C whether it be a bug smasher to Regular public transport that is certified to operate with anything other than pitot/static system other than pre-ww2 biplanes that used a "weather vane" style indicator out in between the wings

Merry Christmas all

Dave
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Old 12-24-2012, 02:13 PM
  #4504
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Default RE: Bob Cat Copy Falcon 120 Jet

As of the council of many forums i bought retractable eflite 60 120. The point is that the front truck is made to open inside. It should be mounted on the inside but it is virtually impossible. Can someone give me some suggestion ? Thanks
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Old 12-25-2012, 12:57 PM
  #4505
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Default RE: Bob Cat Copy Falcon 120 Jet

merry Xmas to you all (or, for rednecks, all y'all)
Before retiring I flew the HS 121, L1011, Boeing 747, 757, 767 and all of these had air driven instruments.
The sources for the pitot and static pressure had bothbeen very carefully chosen by calculation and experiment, then the results were exhaustively tested in wind tunnels and in flight tests.
The pressures were fed into an Air Data Computer which was carefully calibrated to remove all forms of error to give accurate speed readouts.
We used tripleINS (except Trident) for basic position information, but as that could accumulate errors of several miles over a flight it was refined using radio nav aids (DME principally) but I expect now they use GPS which is more accurate.
They are experimenting with GPS based letdowns now but, since raw GPS cannot be relied upon to give a position closer than plus or minus a few metres, they back it up with local ground radio aids for refinement. Full size aviation is pretty accurate.

The FPV flyers use a continuousinformation stream, so they will not be aware of the spikes and dips that I referred to in a previous post.

All this computerised technology is quite amazing, but remember the first rule of computers; GIGO. garbage in, garbage out

As I understand it, these single reading max speed indicators are programmed to calculate using the worst piece of input garbage that they receive during the flight.
Or are the designers fiendishly clever enough to avoid the pitfalls, but too humble to say so?
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Old 12-28-2012, 11:45 PM
  #4506
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Default RE: Bob Cat Copy Falcon 120 Jet

Test flight of my Falcon 1.20 hopefully tomorrow.

Col
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Old 12-29-2012, 03:49 AM
  #4507
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Default RE: Bob Cat Copy Falcon 120 Jet


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ORIGINAL: SeaHawk-RCU

Test flight of my Falcon 1.20 hopefully tomorrow.

Col
Good luck Col,

What club in BNE to you fly at? I'm hoping to go out with the falcon120 tomorrow, but they are predicting 25-30kts winds so that might mean I get more workshop time.

Thanks

dave
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Old 01-10-2013, 04:07 PM
  #4508
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Default RE: Bob Cat Copy Falcon 120 Jet

Rain covers on the store now will fit Falcon 120, Tornado, BobCat, Boomerang

Draw cord to hold it in place

100% Waterproof

Excellent sun cover too for those with decent weather

Manufactured by Steve Johnson so quality is superb

Ian
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Old 01-28-2013, 04:32 AM
  #4509
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Default RE: Bob Cat Copy Falcon 120 Jet

Hi all,

I am just completing a rebuild of my PST600R powered Falcon 120 with some updated hardware and electronics.

I realize that the COG is 13 inches back from the leading edge.

However I can't remember if the COG should be checked with the plane upside down or upright ?

Also should the UAT be full of fuel while checking the COG ?

Appreciate any advice.

Thanks.
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Old 01-28-2013, 05:15 AM
  #4510
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Default RE: Bob Cat Copy Falcon 120 Jet

its a low wing aeroplane therefore check C of G upside down, easier to ballance, UAT full.

Mike
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Old 01-28-2013, 03:24 PM
  #4511
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Default RE: Bob Cat Copy Falcon 120 Jet

Thanks Mike.

Cheers Dom.
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Old 01-29-2013, 04:15 PM
  #4512
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Default RE: Bob Cat Copy Falcon 120 Jet

hi

I appreciate the discussion about one or two servos on elevator. Last summer i had an elevator servo failure on a boomerang at 50'th anniversary fun fly of the club. It has been déclared the best crash of the last 50 last years. (less than 1 hour on a vt80) With the best of my analysis, i conclued 95% more probability that the elevator extension pin went out from the receiver, It probably happened after a minor repair where the plate under the receiver has been unscrued and twisted may times. After the crash i tested severely the serve, wire and extension (joined with heat shrink) without being eable to see an anormal functionning. the data logger of the turbine stated that power was cut to idle 4 seconds before current cut. when i lost te elevator, i was about 300ft high ans a did bring the trottle to idle and observed the show... I can concluded that the crash in not due to RX batterie or receiver failiure.

i just received the tornado v3 yesterday ans i have another bomerang 90% completed. i use two TORK 9080 (helical gear BL HV) on the elevator with two different extension and two different receiver channel without cutting the elevator. This servo is the one i know with the less mechanical resistance when not powered (close to the futaba s9254 who has much less torque), so when i cut the current on one of the servo, i dont see any difference in movement speed or reasonable torque. I use those servo because i had them in stock, my second choice would had been for the alignds610 or ds620, Those servos keeps many thousands of helicopter in the air without known problems with great performance and stability. those servo are easy to find ay $40 max $50 from heli owners who after a crash prefer buying a full kit and resell electronics than buying peices, (align parts are expensives and heli kit at ridiculus price). or from a local heli hobby shop who splits the kits. They can be compared to over $100 servos from JR or Futaba. Those servos also very easy to rotate when not powered.

On the boomerang, the servos are very close so i intend to slot just a bit of servo horn to avoid servo interference, so one will act as main servo and second one as backup.

I will do tests on Tornado but i dont expect to split the elevator and will use 2 servos align DS510 (1 have in stock) will probably be used.

best regards

Jack
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Old 02-26-2013, 06:36 AM
  #4513
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Default RE: Bob Cat Copy Falcon 120 Jet

has or can make somebody please a copy from the front formers ....for the front retract ?
many thanks
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Old 02-26-2013, 06:46 AM
  #4514
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: iamzoli

has or can make somebody please a copy from the front formers ....for the front retract ?
many thanks
Let me know which ones you want, I have them all out of a Falcon 120 as I replaced the complete structure.

Mike
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Old 02-26-2013, 07:02 AM
  #4515
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Default RE: Bob Cat Copy Falcon 120 Jet

Hi Jack, many thanks for your update on the sad loss of your Boomerang and your proposed measures to combat a similar failing. It is interesting to note, that I have never seen duplicate servo inputs on a heli, I fly helis with CCPM and it never crossed my mind about redundancy in these systems, cheers tim
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Old 02-26-2013, 07:27 AM
  #4516
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Default RE: Bob Cat Copy Falcon 120 Jet

tim

My Vario swash plate has four servos on it.

Mike
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Old 03-04-2013, 10:57 AM
  #4517
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Default RE: Bob Cat Copy Falcon 120 Jet

First thanks for helping....i need a copy of the first two formers located in the nose...thanks a lot
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Old 03-27-2013, 06:45 AM
  #4518
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Default RE: Bob Cat Copy Falcon 120 Jet

Sorry for the delay, have been unavoidably preoccupied on other things, do you still need the details of the formers?

Mike
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Old 03-27-2013, 07:58 AM
  #4519
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Default RE: Bob Cat Copy Falcon 120 Jet

EDIT: not able to post pics at the moment will try again later.

Still can't download pic's today 28th March 2013, now the 29th and still can't download to this thread.
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Old 03-28-2013, 12:13 AM
  #4520
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Default RE: Bob Cat Copy Falcon 120 Jet

hi all
got a shipment of the new V3 falcons ready to pick up from the freight company
next tuesday. could not get them customs cleared today and easter has got in
the way as well. post pics next week
ken
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Old 03-28-2013, 04:41 AM
  #4521
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Default RE: Bob Cat Copy Falcon 120 Jet

Here's my falcon mid build.

Got it through Ken at KMRC jets!!

Can't wait to finish it
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Old 03-28-2013, 05:36 AM
  #4522
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Default RE: Bob Cat Copy Falcon 120 Jet

Looks good mate!

Are you going to have it ready for marybourgh jets in June? We can have a crack at formation flying

Thanks

Dave
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Old 03-28-2013, 06:01 AM
  #4523
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Default RE: Bob Cat Copy Falcon 120 Jet

I'll try, I'm keen to get up there this year if I can
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Old 03-29-2013, 04:13 PM
  #4524
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Default RE: Bob Cat Copy Falcon 120 Jet

New incarnation of the Falcon 120 just released, have a look here: http://www.rcuniverse.com/forum/m_11461211/tm.htm

Mike
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Old 03-31-2013, 05:13 AM
  #4525
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Default RE: Bob Cat Copy Falcon 120 Jet


Quote:
ORIGINAL: iamzoli

has or can make somebody please a copy from the front formers ....for the front retract ?
many thanks
Page 85 post No 2116 shows all the formers removed from the fus.

Mike
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