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Ark › Ark X400 first build problem.
10-03-2005 09:20 PM  12 years agoPost 1
T-Bo

rrNovice

Pratt, WV- USA

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Hello everyone. I just built my first Heli, Would have to say that this is a much better built bird then my first DragonFly #36. Problem that I'm facing is that when spinning by hand the main rotor it feels pretty tight. Is this normal after a new build?

The DragonFly seems really smooth compared. Ark 400 belt doesn't seem to be too tight but I did notice that there was some resistance when the belt was off. I didn’t notice anything other than maybe the gear mesh between the belt drive gear and main rotor gear. Is there a way to adjust this?

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10-04-2005 08:57 PM  12 years agoPost 2
skeppley

rrVeteran

Auburn PA

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If you have an earlier model, the gears are not round, and will bind in one section and be loose in another between the motor pinion and the main gear. Try to make it so that the loose side is touching enough that it wont slip or grind under power, and the tight section will probably still be tight! They will wear in eventually, as the plastic is very soft.
To check the tail belt, simply look down through the helis frame, and with a small screwdriver and light tension, push one side of the belt towards the other. If the belts touch without much force, it's to loose. If you have to push like a gorrila to move the belt it's too tight....

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10-04-2005 09:08 PM  12 years agoPost 3
skeppley

rrVeteran

Auburn PA

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Go here:
http://www.rcgroups.com/forums/showthread.php?t=369278
and
http://www.rcgroups.com/forums/showthread.php?t=410731

for some helpful tips BEFORE flying.
remove the "dash" between the rc and the grups in the above link, or it will not work.

Be SURE to glue the SWASH!!!
Zip Tie the Landing Gear
Replace the tail rotors...possibly, mine were fine, but others exploded!!

Lots more on the above links
Shane

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10-04-2005 09:17 PM  12 years agoPost 4
skeppley

rrVeteran

Auburn PA

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There are NO dashes in the thread. When did runryder start allowing links to RC groups.
This is good news

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10-11-2005 09:25 PM  12 years agoPost 5
enginetorque

rrApprentice

North Wales

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tight head

Hi - you want a "fag paper" clearance twixt gears to motor pinion - certainly not a tight mesh. With any heli you must check each stage of the build and cure any slop or tightness stage by stage - it's impossible to tell the reason otherwise!

good luck

two pumps and a squirt

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10-23-2005 02:59 PM  12 years agoPost 6
T-Bo

rrNovice

Pratt, WV- USA

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Thanks guys for the suggestions. I've found that I had missed a screw in the tail housing causing a little flex. After putting that screw in and making sure it was good and tight it has eliminated the tightness. I haven’t tried to give her a flight yet. I’m still working on getting the canopy trimmed up.

Gezz I can't believe how little clearance they left. Did you guys move to the inner hole on the servo horns? I don't see how you can get clearance without doing that or cutting away at the canopy.

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10-26-2005 11:25 AM  12 years agoPost 7
ti9er

rrNovice

Ryde, Sydney, NSW,​Australia

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Hi,

I have built and set up alot of these x400s (part of work) and have found that some experienced or not experienced builders have assembled the tail counter gear wrong.

There is a definite gap between the tail counter gear and the main drive gear (the big one).It shouldn't be touching at all, which sometimes is the cause of tightness apart from the possibility of the gear not being round.

Take note how you have assembled the top bearing block for the tail counter gear and how it looks from the TOP. The assembly of the corresponding LOWER bearing block for the counter gear should look the same (bearing should be exposed with the e-clips. So if you were to remove the e-clip of the lower bearing block, the bearing could be taken out without removing the bearing block itself from the frame.

Hope this helps....

IF IT AIN'T MODE 2 I AIN'T FLYIN' IT!!!
GPH346, JR PCM9X II, GY240, JR G550t
ARK X 400

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