Flaperons on the F-18
 

Anybody using flaperons on the F-18s like the full size, Yellow, TAM, Skymaster...?

Thanks

RE: Flaperons on the F-18
 

Hello::)

You said full flaps in all wing ? Flaps and ailerons like flaps. Like the photo.

I want to know the same thing. I am workning in a Let Legend F-18.


Regards.;)

Carlos.

__________________________________________


http://cmjets.blogspot.com/

RE: Flaperons on the F-18
 

I believe Brice Watson did that with his F-18F (tam's)

I would be reticent to add more drag and in a way that can potentiate tip stalling (decrease effective washouthttp://i384.photobucket.com/albums/o...led/scared.gif), but that's just me!

Raf

RE: Flaperons on the F-18
 

I would think that it would leason the potential to tip stall ?? But if I go back to aero 101, anything that raises the AOA you would run that risk.

RE: Flaperons on the F-18
 

I have it on my skymaster and its not really worth the trouble
If you do
You will need tailevons ,because you lose so much effectiveness on the ailerons
also do not go over board it will change the elevator needed for landing I E more up, and the pitch trim

RE: Flaperons on the F-18
 

While we're on that......why do the hornets take off with both rudders inwards, as per Carlos' pic.......I have been wondering for a long time...has anyone tried that?

RE: Flaperons on the F-18
 

The hornet has a take-off profile where as the pilot never grabs the stick until the plane goes over the edge of the boat. Early on the pilots were getting into PIOs (pitch induced oscillations) off the deck. If you watch some in cockpit video both hands are on the glareshield during the cat shot. As far as the rudders pionted in, that goes away as the airplane accelerates down the deck, has to do with all the take-off profile magic.

RE: Flaperons on the F-18
 

I think PIO is Pilot induced osc...[8D] but I may be wrong. Yes, the F18 pilots have their hands on the rim of the cockpit due to huge G forces on take off. The rudders being towed in is to aid in rotation on take off!!

I had crow on my skymaster F18E/F and it worked great but you must keep tons of throttle on landing. Like Raffy said, flaperons may get you in trouble... The F18F (SM and Tam's) fly very well and slow down on landings, just keep power on final and play with AOA for touch down...

RE: Flaperons on the F-18
 

Hi guys, I recently tried this configuration on me new Skymaster F-18F. So this is what I found out...

In regular configuration the F-18 will need some up elevator when lowering only the flaps. Well when I lowered the ailerons as flaps also my F-18 pitched down and I needed a whole lot of up elevator to keep the F-18 from diving. This is when I understood the rudders role on this. If you make both rudders point inwards this will help the F-18 bring the nose up without adding much more up elevator like in regular configuration, this way you have full elevator travel. I have seen pictures of the ruddesr this way on landing pictures of the F-18.
With my 14mz I made a mix that with one move I lower the flaps, lower the ailerons, apply up elevator and point both rudders inwards. Thanks to the 14mz triming capabilities I could trim every mix on the air until I achieved straight and level flight.
After straight flight was acheived the jet flew very well.
I also had the alievators mix on, so the elevators moved also as ailerons and the ailerons also did move a bit even when flaps down. This would help on low speed flight.
Now on landing I found out that the F-18 floated too much, the jet would not want to come down and also I had some wind that did not help on stability...:eek: I would recommend probably using the speed brakes on landing to help on this. I use it on regular configuration landings and they make the jet much more stable for landings but I forgot to try them, on this configuration.
Anyway with this configuration the posibility of flying on a very short runway is very good.

Here is a video of the first landing... You can see how much the jet floats on landing and also how the alievators are working... very nice...:D

http://www.jetsrc.com/videos/F-18Landing.wmv

Michel

RE: Flaperons on the F-18
 

Hummmmmm

Very interesting Michel. Good job and thanks for sharing.

I am flying my F18 again last weekend. 2 sucessfull flights. Still my favourite

The mixes you are using are very interesting, but something I can not do, because I am using the weatronics and I used to thought this was very good until I realised that I can only use PCM 1024 - that means 8+1 channels[:@]It really sucks to have such an expensive device and not be able to try these settings.

The only solution is to put the laptop on board:D

Nuno

RE: Flaperons on the F-18
 

I am using all 14 channels on my 14mz...[X(] I also have a Powerbox Royale with dual FAAST receivers...:D You can do whatever you want with this setup.

Michel

RE: Flaperons on the F-18
 

Nuno, use the MPX device. You can use it for non-control surface channels. This should free up enough channels to try these mix even when using PCM
I will use that same setup (weatronic + MPX in PCM 1024). Gives me 15 proportional channels (7 in the receiver, 8 in the MPX at lower rate) + the on/off channels (I think those are two, not one)

RE: Flaperons on the F-18
 

I use the rudder's in on my SM F-22 on landing. It works really well.

Jed

RE: Flaperons on the F-18
 

Hello Nuno & Co::)

Two rudders in two vertical fins is like the Roo, Hotspot ... but the real problem is move the rudders like prof and rudder at time (V tail), if you have occupied the prof channel with 2 servos for the horizontal fins, 2 servos in vertical fins and you have another servo for the wheel rudder. How you make this thing with a radio like JR10X ???

I not am able to think how make it.:eek:

Regards from Spain.;)

Carlos.

_____________________________________________


http://cmjets.blogspot.com/

RE: Flaperons on the F-18
 

Hello Michael
Did you lowered the ailerons as flaps with the same angle as the Flaps ?
Did you put a lot of angle inwards on the rudders ?
Thanks
Nick

RE: Flaperons on the F-18
 

Hi Nick yes ailerons went down with the flaps, I got around 40mm at full flaps meassured at the flaps edge near the fuselage. Flaps and ailerons where alingned so they looked like one big flap just like the real F-18F.

I did not meassure how much inward rudder was applied becasue I could trim that in flight with the 14mz. I conected the mix with a knob and I started with little movement and applied until straigh flight was achieved.

Michel