RunRyder - HELP!!!!!!!! Do the Bunny Hop! Hop! Hop! Hop!

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Ace Hobby	.	Esprit Model	.	Thunder Power RC
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Main Discussion > HELP!!!!!!!! Do the Bunny Hop! Hop! Hop! Hop!

goingtojapan
Heliman
Location: Virginia Beach, Va

I can't figure it out. I have a fairly new Nexus and when I put ir into throttle up and get her light on the skids she sits there perfectly. I can take her off and fly almost perfect for about a minute. It then starts to bunny hop. She goes up and down real fast. Weather I am in the air or on the ground. It moves her about a foot up and down real fast. I have checked the complete radio system and it is ok.

Is there something I am missing.

I have another ? for the pros too. When flying the same machine I hover her and it seems that when perfectly still the entire frame is twisted slightly . The blades are like ~~~~~ and the frame is like /

.................~~~~~~~~~~~~~~~~~~~
.................................../..../
................................../..../
................................./..../
.............................======
............................./............\
............................/..............\

It isn't that bad but you get the point .

PLEASE HELP ME!
Thanks

03-19-2002 Over year old.

HOMEPAGE

jackd63
Senior Heliman
Location: Loveland, Colorado

probably a long shot but by any chance is the collective servo or any linkage loose?

03-19-2002 Over year old.

goingtojapan
Heliman
Location: Virginia Beach, Va

I checked that. All the servos are fine. I even thought that it might be vibrations and I started to shake the mackine while she was not running and on the stand. Nothing.

03-19-2002 Over year old.

HOMEPAGE

1UP
Key Veteran
Location: Claymont DE.

have you dunn a RANG TEST yet ???
james

JAMES
member of the HOT GIRLS thread
If it's worth doing, then it's worth over doing

03-19-2002 Over year old.

Virtual1
Senior Heliman
Location: Waterloo, Iowa - USA

Sorry I don't know a lot about the Nexus head mechanics or I'd have more ideas, but...

If there's a collar or other retainer on the main shaft, check it. Make sure that there is no vertical play in the main shaft. If the Nexus has a collar like on the Raptor, and it's loose or up a bit from where it belongs, the main shaft is sometimes allowed to slide up and down in its bearings, (main gear and all) and this would give you instant changes in pitch, up and down. It doesn't require much play to change your pitch a good amount.

You can't simply test this by just pulling up and down on the main shaft, you have to look for the play. The bearings have a good grip on the main and won't allow it to move freely up and down all of the time. (which explains why your heli only jumps sometimes, and only after it's been in the air for a little bit)

03-19-2002 Over year old.

HOMEPAGE

mtj4300
Heliman
Location: Arlington, TX

nexas problem maybe

i own a nexus. check the the pitch controller right above the swash plate. the ones that tilt when the slider is moved theres a lil hex screw. Make sure its tight its really tiny. even if its lil loose it will wobble the blades making your pitch difference. it might fly fine when the blades are going slower. then when you hit idle up the centifical force may be causing it to move a lil.

03-19-2002 Over year old.

Maxx
Key Veteran
Location: Shreveport Louisana

I don't know much about the Nexus...if it has thrust beariings you might check to see if they are installed correctly and have grease in them. Either will cause the grips to "lock" when the blades spin up and make it difficult for the collective servo to change pitch smoothly. Chris

03-19-2002 Over year old.

whrlybrd
Senior Heliman
Location: Little Rock, AR

I had an intermittant problem similar to this on a Falcon. Finally pulled the head and found the spindle was slightly out of alignment. No crash or boom strike only one slightly hard landing in the wind. Changed spindle and the vertical hop stopped at spool up and hover. Don't know if this is your problem but fixed mine.

03-19-2002 Over year old.

MooneyDriver
Veteran
Location: Kent, Ohio

Stupid Question...

Have you checked the blade pitch? (on both blades?)
I don't know much about that particular chopper, but at hover, it should be somewhere between 5 and 6 degrees. Also, the throttle curve should be somewhere around 50% at hover (probably around center stick for you...)

-Neil

Hey man, why does my lipo get bigger every time I charge it?

03-19-2002 Over year old.

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Mikado Modellhubschrauber	.	GrandRC	.	CanoMod
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Main Discussion > HELP!!!!!!!! Do the Bunny Hop! Hop! Hop! Hop!

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