mick15

Congrats on your F14 maiden Barry, I will be maidening myF14 at the Classic jets fly in on the 26th of this month. It is the same setupas yours with two 210s, the info regarding the up mix for the flap deploymentis most useful.

Regards Mick

DrScoles

My Feedback: (18)

Alex, I'd like a set, how much and do you take paypal?

Thanks, Mike

Randy M.

My Feedback: (38)

Congrats Barry. The F-14 is my all time favorite. Maybe someday......

muzzgail

Hi Barry, well done. Nice to hear the Kingtech's did the job for you.

Did you alter any of the throws or cg position from the manual. I would like to set mine up with your 14% elevator compensation in mind.


1. Elevator 115mm at L/E up/down
2. Rudder 16mm at T/E
3. Ailerons 93mm wing forward & 40mm wing back
4. Flaps 20 deg T-off & 45 deg landing
5. Spoiler 100% with 60% Aileron mix
6. Slats 10mm T-off & 20mm landing

Alex48

Hi Mike

Send me an email or PM me your address and I'll give you all the details.

Cheers, Alex

marquisvns

Wim, that's good, but you may want to anticipate to be flexible with battery locations.

Alex, order placed, payment sent!

Fender, I'm only using servo delay, and is working quite well, although ideally should be all done with the 5 in 1, would save one precious channel out of the 18 for this jet, anyone could help with the 5 in 1 would be great! Currently I have failsafe set at 35 psi and works fine, at 50 psi may bind.

http://youtu.be/S5N-KEpgAbE

marquisvns

Thanks Mick, you may also want to pre-subtrim your elevons LE at 37 mm under the upper edge of the fuselage, no flaps. Good luck, let us know!

Barry

marquisvns

Thanks Randy and rest of your support!

Murray, I use all those figures from the manual and they are excellent, if anything maybe mild down on the roll a bit. As with flaps, I can't get more than 40 degree on full, while the takeoff only at a shallow 10 or so degree, since I would like to use them with 1/2 slats when wings are half swept to simulate combat mode of an F-14 . The CG I opted to just keep it right at the face of the front spar, not forward. As with D/R I ended up having 15% pitch and 30% roll. Really look forward of more flying if it's not for this 110F heat wave we are having......

Cheers,
Barry

WimB

My Feedback: (1)

Barry,

that's great info...

To check my layout, I did a preliminary CG check yesterday, and it turn out a bit tail heavy. this was with empty UAT's though, an not all the stuff in the nose. So I do believe it will turn out quite good.

I'm building a 'tray' arrangment in the nose, which will come out with the removable nose cone structure. This will hold stuff like the 5-in-1 valve, valves for the brakes and tailhook, Powerbox, batteries, fill valves and so on... a coulpe of bolts and it comes out like a single unit, will make maintenace easier... will take pics of what I mean....

Wim

FenderBean

Barry- I was trying to clearify, did you use one valve for the gear/gear lock and 2 valves for the doors with one being part of the 5/1 valve. Im guessing the second valve with a servo delay.

mick15

I use a cockpit valve for my doors

FenderBean

do u mean a button valve?

mick15

No I mean the cockpit valve, it has one inlet and four outlets. Two for canopy ram and two for canopy locks so has to be timed. Therefore it can be used for the U/c doors which also have to be timed.

m

marquisvns

Fender, I have another dual action valve from a separate xplus channel to actuate the front doors and I'm using servo speed to sequence, Spektrum would probably suggest you using the sequencer of the DX18 to do this, either way, would require this additional channel. What I was referring is to plug this dual action valve directly into the 5 in 1, and use the 5 in 1 to sequence the front door, problem is, programming it....., any help?

Mick, would your set up require an additional channel as well?

Regards,
Barry

DrScoles

My Feedback: (18)

The spoiler with aileron mix is confusing me, do you mean when aileron is at 60%, the spoiler is up 100%? Is the spoiler used when the wings are swept back? I was under the impression that these were kind of scale like things that weren't functionally necessary.

Barry, did you sweep the wings on your two flights?

FenderBean

nope that clears it up for me thanks

marquisvns

No problem Fender, anyone has good knowledge with programming Airpower 5 in 1 please chime in, thanks in advance!

Mike, I did sweep the wings up to about 40% on the second flight, but the aerodynamic flight load pulled them forward during the second lap around, so I left them there for the rest of the flight. I'm buying another pair of Firgelli with higher ratio, report will follow, but meanwhile, if I get to fly, I will try to deploy some slats and that 10 degree flaps to try to get some drag and hope the wings will stay put (or perhaps pulling forward harder???). During the brief lap with some wings slightly swept back, I thought I noticed a bit of up trim would have been desirable. So I now have 3% up trim programmed in the DX18 sequencer which reads wing sweep positions in 5 intervals.

PowerBoxDanny

My Feedback: (47)

Make that 3. I will have mine ready for Kentucky jets also! Still debating on power plants. Wanna keep her light!

muzzgail

Thanks for the info Barry, very helpful.

I have started doing one of the wings. I have found the travel of the flap was limited to about 30 degrees, but with a little grinding of the flap actuating rod and some rounding of the end also, I now get about 60 degrees. The book calls for 45 degrees, so that's all good.

Craig B.

Hi Barry,

Were you using the stock actuators or the Firgelli servo version that operates at lower voltage? How did the wings sweep forwards during flight? I would have thought that drag would have caused them to sweep further aft if the actuator failed/ stalled or was over-powered.

invertmast

My Feedback: (23)

the center of pressure on the wings is aft of the pivot which causes the wings to pivot forward

Craig B.

Thanks for the clarification Thomas. It is interesting that the resultant moment is sufficient to overcome that caused by drag.

invertmast

My Feedback: (23)

Yea i never would of thought it either, but when i was messing with my mockup wing and the pivot, if you put pressure anywhere behind thr pivot it would pivot forward

Chris Nicastro

My Feedback: (3)

Just wondering if you guys are talking about pressure on top of the wing? If SM tilted the pivot forward from vertical then pressure on top of the wing would naturally push the wing forward under load.
From reading about the full scale wing pivot they are set forward about 3 degrees. When the wing pivots back the tips come up because the plane is tilted. The effect counters the CG shift and adds up elevator basically.
So on the model if the pivot is tilted forward then the load is on top of the wing which would explain the forward sweep in flight, wouldnt it?

marquisvns

Oh, one more thing before you maiden, be sure to Loctite the nose gear steering set screw. Li Kai had a flat spot on the steering arm, but set screw may still come loose. I lost 90% of steering after the second flight while making an U turn at the pit area, and I think that's also what happened to the landing roll out in the video in post #1026.

Regards,
Barry