1_helihover_1

Hello

Had maiden flight on my UF today, and it flew awesome. But ground handling was terrible...I run stock gear with Intarico wheels, and I really had a hard time keeping the plane in a straight line during take-off and landing. Several times I had to abort due to the fact that the plane was skidding all over the place - it really had some spectacular drifts...

It got better with some, more, Toe-in - but what is the fix here? I fly mainly from asphalt.

Thanks, Helihover.

Justflying1

What I do with my jets is set very little movement on my steering during take off. I also set 35% expo to all my flight controls.

AFTERBURNER1

My Feedback: (80)

Dump the stock composite arf nose wheel. Replace it with a hard rubber nose wheel of the same or a bit smaller size. BVM, interico will suffice. Get an 6mm drill bit, drill out the hub of the new wheel and use the stock wheel guts.. ALL OF YOUR PROBLEMS WILL GO AWAY!!

No need to mess around with rates, expo etc etc...

quist

My Feedback: (198)

8MM??? I dont think so.

I have used both the bvm and intairco, problems went away.

AFTERBURNER1

My Feedback: (80)

I believe it is 6mm. My bad.... you drilled it.... Was 6 mm yes?

basimpsn

My Feedback: (5)

I had the same problem.

http://www.rcuniverse.com/forum/m_10...76/key_/tm.htm

indubitably

My Feedback: (14)

You might try a little up elevator during takeoff, easing some as you build up speed. But a light nose wheel will not bite so hard. A hard rubber wheel also may have less traction. But the elevator means you dont have to change anything. Just something to try while you wait for the BVM nose wheel.
John

AFTERBURNER1

My Feedback: (80)

Change the nose wheel.. That is ALL you need to do.

InboundLZ

My Feedback: (10)

This is the voice of experience, a smart man would heed the advice....

wojtek

My Feedback: (73)

+1

~V~

Mariosff

Had the same proplem with my F20 and some toe in and elevator up during the ground roll to keep some weight on the mains, solved the proplem

dubd

That's not going to fix the problem with the ultra flash.

Dave Wilshere

Really????
I've never seen an UF abort a take off in England or Germany on hard runways...all use stock gear and nose tyre! I know its hotter there than here (all though I'm sure someone flew in the 30 degrees we had this last weekend) I just have 35% expo on the nose steering and that is it. I with the amount of trail it has on the nose leg it runs straight all the time.

Dw

Gra55h0pper

I had the same problem with my regular Flash with stock Intairco wheels. Ground handling was like being on ice and expo, toe, etc. didn't help. A gyro on steering did the trick though! Never had a problem since! Highly recommend it.

Dave Wilshere

You guys must grease your runways

Dw

miniman

+1

Peter

sailing1

My Feedback: (134)

Like some have mentioned, I had the problem on my Classic Flash. Changed to a Tam's solid nose wheel and dialed in the correct amount of toe in and that helped a lot. What finally tamed the beast for me was building a mix that lowered the steering rate when the flaps were down. On top of the mix I put about 40% expo on the dialed down steering and the problem was totally cured for me anyway.

I have the same setup on my Ultra and it works just fine.

BaldEagel

Is your nose wheel trailing, by that I mean is the whole leg pointing backwards not just the wheel yoke?

Mike

Ramz

Stock behotec and Intairco wheels and no issues at all on grass and asphalt. Never had an aborted takeoff. Sounds to me like some left stick practice is in order along with some proper setup.

Helijet

All stock set up on mine with CARF suggested gear. 5 degrees of throw on the nose with 30 % expo. Tracks fine.
For those with bigger engines don't slam the throttle. Start the roll at 1 /4 throttle then as she begins to pick up speed, go to full power.
Anyway....dozens of flights here and never an aborted one.

Cheers

Dean W.

InboundLZ

My Feedback: (10)

I had nothing but issues on my Flash until I changed the nose wheel. It has nothing to do with left hand practice or anything else for that matter. You want to dick around with all the different suggestions given here, knock yourself out. Once you get that out of your system, you will finally change your nose tire and your problems will be over. With 357 flights in 14 months I am speaking from a position of experience.

PHIL GREENO

The reason why you guys have direction problems on take off is because you have too much steering.

There a three things you can do.

1. Fit a harder less grippy front tyre to give you understeer.

2. Adjust the standard set up correctly.

3.Use a gyro on the nose leg servo.

On the UF it is not neccesary to do either items 1 or 3.

If you set up the nose leg correctly as follows you will have no problems.

You will need to have your rudder/nose leg steering on seperate channels so dont use a Y-Lead.

Use a standard mix with rudder as master and it is usefull if you can asign nose leg steering channel trim to a seperate trim lever(no problem on a Futaba 14/18MZ so you can set your nose leg tracking without effecting the rudder trim position.

Adjust your ATV for nose leg channel so you can taxi OK and just make a nice large turn (not tight) to come on to the centre of your run way for take off.

Use a lot of expo on nose channel.I use -60% on my 18MZ.

The standard Carf nose leg has Caster(trail) so the nose leg will always want to caster straight any way.

Open your throttle smoothly for take off and youshould have no problems at all with the standard gear as supplied.

Phil.

1_helihover_1

Thank you all for suggestions - greatly apprechiated. New front wheel is ordered 

AFTERBURNER1

My Feedback: (80)

Left stick practice,,, NOT... U r funny..l

AFTERBURNER1

My Feedback: (80)

Funny stuff here D!!!!! Like u or I wouldn't know.. I only have a handful of flash flights under my belt..

Let them putz with gyros, expos, toe etc etc.

Replace the nose wheel,,,, problem solved.