new2jets

I made mine out of 20mm aluminum plate with 6 degrees down thrust

joeflyer

My Feedback: (48)

Search back in this thread, there are lots of good ideas. It's pretty easy to bend one out of aluminum sheet metal. 5 degrees downthrust works pretty good with the smaller engines. For anything larger than 14# I'd recommend 6 degrees. I posted a sketch early in this thread.

Joe

Nickosfly

@new2jets

Can you make those also for an Wren 44 gold?
I think its not only looking good, its very neat and strong to install the turbine!!

Grtz
Nickos

mardio

Has anyone ordered retracts from (Spring Air Products) (http://www.retracts.com/)
And have you had any problems with this company

Anthony

NightFlyer1

I just ordered a set of 700's from Spring Air. NO PROBLEM AT ALL! I have ordered a few times from them before also with NO issues.

new2jets

don`t see why they will be any different the center line of the engine would be in the same place and in line with the hole in the back of the fuz just move them closer together ,
any way gold 44 will fly this bird but theres flying & flying wren supersport is the best bet light with 18lb + thrust .

new2jets

not a falcon but thought you might like to see this, me flying and new2-2jets on the camera this was one of our none turbin days and the falcon is a lot easyer to fly have fun

video 1 http://www.youtube.com/watch?v=z-zvd...eature=related

video 2 http://www.youtube.com/watch?v=bdbfoC184xk

Ed

To balance this bird at 13" from wings leading edge, is it easier to do inverted or upright ?

> ......... zak

mardio

I order a set of retracts from them on the 8/08/2008 and as off today I have not received them and they will not reply to any off my emails
Not sure what is going on with them ??????

new2-2jets

balance the bird is best upside down-according to new2jets

TURBINATOR

Mardio,

They are a little slow getting things out. I had a little wait for mine. However, when I had a valve go bad, a new one was sent at no charge. I think the company is run by a gentleman and his wife.

Jeff

parabelum

Hi guys, my name is Christophe and I'm flying a falcon 120 with P80.

I live in France.

The first flight as been down last weekend and it was wonderful! 4 minutes of happyness!

I'll try to post some pics soon.

I have now a question:

Why are you all putting some downthrust on the turbine? how much sould I put with my P80?

What is the real center of gravity? On the maiden, my falcon was nose heavy but COG was at 320 mm (330mm on the guide book).

I'm going to JET POWER this weekend so if anybody of you want to meet and discuss with me I'll be pleased.


have nice flights all, regards,

Chris.

NightFlyer1

parabelum (chris) I have a P-80 also. I have not flown it yet![:@] I still have to get a measure on my downthrust, but I think I might have 5-6 degrees of downthrust.

joeflyer

My Feedback: (48)

Hello Chris,

I have made several mounts for Falcon 120's. The plane has a flat bottom airfoil and tends to climb at higher speeds. The faster you go the more it wants to climb, just like a trainer. Downthrust offsets this tendency.

5 degrees of downthrust works for 14 lbs. class engines. I have found that the more powerful the engine the more downthrust is needed. I have 6 degrees downthrust with my Wren SS (18 lbs. thrust) and it works well.

If you have an older P-80 I suggest that you start with 6 degrees. If it tends to climb at high speed then you can shim it slightly with washers. If you have a newer 21+ lbs. P-80 then I suggest you dial down the thrust.

The recommended 330 mm. CG works very well.

Regards,
Joe

new2-2jets

well i gave her another 3 flights sunday although i think the grass was too green and the sky was too blue for some,along with that bright ball in the sky-all abit too much for most down my local club

parabelum

Thanks for info!

I'll put the COG at 330mm.

I've exchanged my old P80 number 122!!! So I have a brand new P60SE with kero start and I thinking about selling it and buy a bigger turbine to put it in another (bigger) plane in the futur.

My reflexion is: what should be the best turbine between Merlin 90 and Rabbit?

Does anybody knows what size of tank is needed for the smoke fluid used with a smoke system on the Falcon?

regards.

new2jets

well some of us have to work sometime, what`s that growing out of your fire extinguisher[:@]

new2jets

Well i been at it again and redesigned front t/link here are the pic`s

new2jets

and some more pic`s, hopefully we will get air born at the week end !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

tim777jet

Hi Parabellum, I use 250 ml of diesel fuel,which gives me about 30 seconds of smoke. I use an air bottle (same as the retract bottle) to push the fluid out of a small plastic tank. I use a small servo to operate an air valve to allow the air from the air tank to the fuel tank. The fluid is pushed through a 3mm brass tube into the exhaust. The tube is crushed approximately 3mm from the end down to about -015 thousands of an inch. I have found it slightly better if the tube is not crushed right at the end, crushed 3 or 4 mm from the end with the tube round at the extreme end seems good. I have been told that the end of modeling knife is just about perfect. I have found it best to spray the fluid slightly fwd into the exhaust flow, just make the bend slightly more than 90 degrees. I tried expensive smoke fluid but it is only just slightly better than diesel but about twice the price. There is some footage on youtube under falcon120.
If you need any more info please pm me for a chat. cheers Tim

Ps i use air and not an electric pump, because i have no more channels left on my transmitter and didnt want to run the pump dry. I now use the rudder mix switch, linked to the undercarriage up selection to give me a small amount of extra movement to operate the air valve, so it is now fully selectable on or off without the need for an extra channel. To clarify, i select up on the gear, gear goes up and smoke is off. Now select the rudder mix switch and the air valve opens due to the undercarriage selector moving 2 or 3 mm more.

Aussie1

new2jets, very impressive! How did you form the fork holding the nose wheel? I formed mine by cutting and filing from solid block, good for the arm muscles!! I'm still quite surprised how easy it is to make a good quality shock obsorbing U/C.

tim777jet

Ausie, meant to reply earlier, great job with the undercarriage, a credit to you, let us know how they perform.
I flew with a boomerang jet again and took a bit of inflight footage, posted it here. Flycam is now 100% reliable, it has not failed once, following the mod i did on the battery, see previous post

www.youtube.com/watch?v=_vSsmtkkTK4

Boomer has an 18 pound Wren 54 super in it and weighs somewhere around 16.5 pounds all up with fuel. The falcon still needs 1/2 or full flap for me to fly along side comfortably and appears a lot faster in flight. You can see on the take off that we get off at about the same point which is a credit to the Falcon, with no flap, and all up weight full of fuel and smoke fluid, landing light, brakes, extending nose leg and repairs etc, I was at 20 pounds AUW, and the engine puts out only 13.5 pounds to 14 pounds. Credit to the model.
we are at 84 flights now and last few flights were in zero wind, what a delight to fly. tried my first landing on the tarmac, really nice, but my right brake decided not to perform as well as the left, hence the pull to the left on landing. One thing i learned was to stand at exactly the same distance away from the landing model that you normally do. I was tempted to stand a bit too close to the slightly narrow tarmac and landed a little closer than normal to me, so perspective was slightly different. I will remember to stand a touch further away next time.
Also, whilst taking off together, if an engine failure occures, we agreed to imediately turn left off the tarmac to prevent a collision. It is great fun flying together and we really did get it together at the end, but alas didnt have video of that, but we did find it easier to fly slower rather than fast, and the best position to form up is on the approach, down the strip, as this the most familiar position you will be in, ie lined up for a landing. on the down wind leg it is hard to judge distance. On one occasion the boomer came very close to the smoke and Bob lost sight of his model momentarily and another occasion, with full flap on the falcon, he hit my wake and the turbulence rocked his model.

Cheers Tim

Speny

Tim - You the man!!

That is the dogs whatsits.

Spen

new2jets

Hi Aussie1 i profile milled it out of some 1/2" ali plate on a cnc milling machine not much good for your arm muscles but does a nice job, have you tryed your undercarrage out yet ????????

NightFlyer1

Whats bolts/screws are you guys to hold the booms on? M6 Metric?? I WANT TO KEEP the originial blind nuts, just replace the plastic bolts.
Thanks