Bob Cat Copy Falcon 120 Jet
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RE: Bob Cat Copy Falcon 120 Jet
Anybody else having trouble fitting wings to fusse? It's like the wing tube does not line up. Any ideas on possible fix would be appreciated.
I have thought of tweaking the wing tube to fit. Tearing the wing tube out and re-aligning it. Making filler to fit between wing and fusse.
They lack 1/2 to 3/4 inch of meeting fusse at trailing edge.
Also if anyone has an extra set of tubs I need some.
#4529
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RE: Bob Cat Copy Falcon 120 Jet
hi xairflyer
you are spot on. if the spars don't line up do this. make the holes bigger
then bolt the wings to the fuse. make sure everything lines up then glue in
the new blocks. it's what we have been doing in oz. works great.
ken
you are spot on. if the spars don't line up do this. make the holes bigger
then bolt the wings to the fuse. make sure everything lines up then glue in
the new blocks. it's what we have been doing in oz. works great.
ken
#4531
RE: Bob Cat Copy Falcon 120 Jet
What Ken said. This allows you make sure both wings are lined up perfect and only takes a few minutes to do and it also adds some strength to the side fuse where the spar is as well. This is a pick of mine before the hysol was added.
#4532
RE: Bob Cat Copy Falcon 120 Jet
I wonder why this happens on some and not on others, the fus must come out of different moulds to be this far out, or would it be different wing jigs perhaps?
Mike
Mike
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RE: Bob Cat Copy Falcon 120 Jet
mine was as out as well, but i just re-aligned the front spar, and potted the hole in with a milled fibers/resin mix. been great for ages now.
Thanks
dave
Thanks
dave
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RE: Bob Cat Copy Falcon 120 Jet
On my Falcon the front spar holes weren't even drilled in the fuselage.. One side had a molded in circle where it should be but the other side was bare.
Careful measuring and drilling (slightly oversize) and the glued block method explained previously and all was well. The first flight on my Falcon was with a RAM750 for power. Second flight ended when a blade exited through the exhaust duct on takeoff. Falcon now has a Kingtech K80 (slightly de-rated) and flies beautifully. http://www.youtube.com/watch?v=jrBdMA2Iq5Y for vid.
Col
Careful measuring and drilling (slightly oversize) and the glued block method explained previously and all was well. The first flight on my Falcon was with a RAM750 for power. Second flight ended when a blade exited through the exhaust duct on takeoff. Falcon now has a Kingtech K80 (slightly de-rated) and flies beautifully. http://www.youtube.com/watch?v=jrBdMA2Iq5Y for vid.
Col
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: SeaHawk
On my Falcon the front spar holes weren't even drilled in the fuselage.. One side had a molded in circle where it should be but the other side was bare.
Careful measuring and drilling (slightly oversize) and the glued block method explained previously and all was well. The first flight on my Falcon was with a RAM750 for power. Second flight ended when a blade exited through the exhaust duct on takeoff. Falcon now has a Kingtech K80 (slightly de-rated) and flies beautifully. http://www.youtube.com/watch?v=jrBdMA2Iq5Y for vid.
Col
On my Falcon the front spar holes weren't even drilled in the fuselage.. One side had a molded in circle where it should be but the other side was bare.
Careful measuring and drilling (slightly oversize) and the glued block method explained previously and all was well. The first flight on my Falcon was with a RAM750 for power. Second flight ended when a blade exited through the exhaust duct on takeoff. Falcon now has a Kingtech K80 (slightly de-rated) and flies beautifully. http://www.youtube.com/watch?v=jrBdMA2Iq5Y for vid.
Col
I started out with a Wren 54 Mk2.5 and now have a K80F running at max twat[8D]
Thanks
dave
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: BaldEagel
I wonder why this happens on some and not on others, the fus must come out of different moulds to be this far out, or would it be different wing jigs perhaps?
Mike
I wonder why this happens on some and not on others, the fus must come out of different moulds to be this far out, or would it be different wing jigs perhaps?
Mike
Front spar hole also needed drilling in the fuselage which was better so I could make sure it was inline myself.
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RE: Bob Cat Copy Falcon 120 Jet
my falcon has a K100G on it cant say it goes much faster than a falcon with a K80
but go vertical with the throttle wide open it wont stop climbing great fun
ken
kmrc jets oz
but go vertical with the throttle wide open it wont stop climbing great fun
ken
kmrc jets oz
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: ticketec
de-rated?????[X(]
I started out with a Wren 54 Mk2.5 and now have a K80F running at max twat[8D]
Thanks
dave
de-rated?????[X(]
I started out with a Wren 54 Mk2.5 and now have a K80F running at max twat[8D]
Thanks
dave
Most flights, loops, rolls etc, at 1/2 throttle. Just the right speed for my old eyes.
I love flying it.
Col
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: ticketec
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
ORIGINAL: SeaHawk-RCU
Test flight of my Falcon 1.20 hopefully tomorrow.
Col
Test flight of my Falcon 1.20 hopefully tomorrow.
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
Hello Dave,
I have just found this post, sorry about that.
The Falcon test flight went off well. RAM 750 on back performed well, flew with 5 clicks of up trim. I left the gear down for the maiden. All ok.
Second flight the RAM shed a turbine blade just after takeoff. Punched a hole clean through the exhaust duct. Gear up and landed in the rough, right main wasn't quick enough and was ripped out.
Falcon now repaired and with low time gas start Kingtech K80 fitted. I love it.
I am a member at LARCS in Logan City though most flights of the K80 powered Falcon have been at Tingalpa due to the floods in Feb. Where abouts are you based Dave? Would be great to fly together one day.
Cheers
Col
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: SeaHawk
Hello Dave,
I have just found this post, sorry about that.
The Falcon test flight went off well. RAM 750 on back performed well, flew with 5 clicks of up trim. I left the gear down for the maiden. All ok.
Second flight the RAM shed a turbine blade just after takeoff. Punched a hole clean through the exhaust duct. Gear up and landed in the rough, right main wasn't quick enough and was ripped out.
Falcon now repaired and with low time gas start Kingtech K80 fitted. I love it.
I am a member at LARCS in Logan City though most flights of the K80 powered Falcon have been at Tingalpa due to the floods in Feb. Where abouts are you based Dave? Would be great to fly together one day.
Cheers
Col
I live on the north side so a member of SAAMBR and used to be member of the southern cross warbirds so have got round to most of the clubs in S.E. QLD. I've flown warbirds quite a few times at LARCS
It would be great to get together for a fly. Are you going up to the "cancelled" but still on Marybourgh jets? There is normally at least 3 Falcon 120's there with various setups and turbines, and just an awesome event and field!
Thanks
dave
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: ticketec
uh, nasty.[]
I live on the north side so a member of SAAMBR and used to be member of the southern cross warbirds so have got round to most of the clubs in S.E. QLD. I've flown warbirds quite a few times at LARCS
uh, nasty.[]
I live on the north side so a member of SAAMBR and used to be member of the southern cross warbirds so have got round to most of the clubs in S.E. QLD. I've flown warbirds quite a few times at LARCS
It would be great to get together for a fly. Are you going up to the "cancelled" but still on Marybourgh jets? There is normally at least 3 Falcon 120's there with various setups and turbines, and just an awesome event and field!
Col
kittyhawk at optusnet dot com dot au
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: SeaHawk
I was a member of SCAF for quite a while Dave so we have probably already flown together.
I was intending to go when it was on but now that it is off but still on I will see who else is going up. Might see you there.
Col
kittyhawk at optusnet dot com dot au
I was a member of SCAF for quite a while Dave so we have probably already flown together.
It would be great to get together for a fly. Are you going up to the ''cancelled'' but still on Marybourgh jets? There is normally at least 3 Falcon 120's there with various setups and turbines, and just an awesome event and field!
Col
kittyhawk at optusnet dot com dot au
love the fact the modelling community can be so small some times
It's back on again, but just not open to the public. here is a cut & paste from another forum:
I got this message from Ian Cawthray
Jets over fraser Coast on the Friday 28th june to Sunday 3oth june will be run as a social fly in for jets only this year .
This is a closed event with no public .
A canteen will run for hot food from 9am to 2 pm on all days
Camping on site is $ 10 per site per night . ( no power on site )
A pilot fee of $ 20 dollars for 3 days of flying .
Raffles will be run over the event with good prizes .
All model must have certification and all pilots must have current licence .
Come to Maryborough for a great flying event .
Flying 7am till dusk ..
For more details ..Ian 0418879611
.. Steve 0400703779
I have just left a message at our regular place we stay at in town to book some cabins. better get cracking with the my new EDF project I want to have finished for the event! and go throught the falcon 120 to make sure everything is all good.
Thanks
dave
P.s. I do really miss the good 'ole SCAF days before it went all pear shaped. Here are some pic's that might help you work out who i am
#4545
RE: Bob Cat Copy Falcon 120 Jet
K've been slowly plugging along at mine, off to a conference for the rest of the week so finished both wings tonight. All working well with no servo stall. 20deg take off and 45deg landing flap easily achieved.
elevator stab is also finished and glued. Pic of it attached to my Boom Stick
elevator stab is also finished and glued. Pic of it attached to my Boom Stick
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RE: Bob Cat Copy Falcon 120 Jet
Hey Jeremy,
Can you take some pics of the carbon fibre reinforcement around the u/c mounts in the Gen 3 Falcons please?
Secondly, is 20degrees of flap effective for takeoff when using split flaps? My understanding (probably flawed) was that using conventional flaps that the best lift drag ratio was obtained with about 12degrees and that with split flaps it is all drag.
My Falcon with the K80 doesn't need any flaps for takeoff from grass.
Cheers
Col
Can you take some pics of the carbon fibre reinforcement around the u/c mounts in the Gen 3 Falcons please?
Secondly, is 20degrees of flap effective for takeoff when using split flaps? My understanding (probably flawed) was that using conventional flaps that the best lift drag ratio was obtained with about 12degrees and that with split flaps it is all drag.
My Falcon with the K80 doesn't need any flaps for takeoff from grass.
Cheers
Col
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: BaldEagel
Have a look here: http://www.rcuniverse.com/forum/m_11461211/tm.htm on post two.
Mike
Have a look here: http://www.rcuniverse.com/forum/m_11461211/tm.htm on post two.
Mike
The pics on the Kestrel thread seem to show carbon fibre laid across the top of the engine bearers and some reinforcing of the sheeting near the flap mounting. I cannot see if there is any at the bearer/rib join which was the weak spot on my Falcon. The right hand main on mine was torn out after the turbine shed a blade and I had to do a wheels up in the rough (rh main wasn't quick enough in retracting). The left main fell out after a normal landing on grass. The bearer to rib join wasn't good. I replaced with gussets on each contact point and all seems good now.
What I am really trying to find out is if the factory, the the Falcon Gen 3/Kestrel, have strengthened the bearer to rib join or simply laid CF across the top of the bearer.
Cheers
Col
#4549
RE: Bob Cat Copy Falcon 120 Jet
I assume you meant undercarriage bearers and not engine? To be honest what I think they have done is layered carbon onto the wing sheeting prior to glueing it onto the wing ribs. What I think they should have done was extended the bearers another rib. Have to admit on my Falcon as with all the fus formers when I worried the UC bearers they all fell out, what this did do was make it easy to Hysol them back in with some reinforcement.
Mike
Mike
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RE: Bob Cat Copy Falcon 120 Jet
ORIGINAL: BaldEagel
I assume you meant undercarriage bearers and not engine?
I assume you meant undercarriage bearers and not engine?
To be honest what I think they have done is layered carbon onto the wing sheeting prior to glueing it onto the wing ribs. What I think they should have done was extended the bearers another rib. Have to admit on my Falcon as with all the fus formers when I worried the UC bearers they all fell out, what this did do was make it easy to Hysol them back in with some reinforcement.
Mike
Mike
Cheers
Col