RunRyder - X-Cell tail vibration

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 424 ONLINE 19 EVENTS SEARCH REGISTER START HERE

2 pages [ << < ( 1 ) 2 NEXT >> ]

1107 views

POST REPLY

Century Helicopter	.	MTA Hobbies	.	Model Rectifier Corp
	.		.

Gasser Model RC Helicopters > X-Cell tail vibration

turling
Heliman
Location: Idaho Falls, ID

I have an X-Cell gasser with a Zenoah 23 with about a gallon of gas through it. The tail seems to vibrate excessively and I'm worried about it. The mixture settings are high-1 1/8 low-1 1/4. What could be the source of the vibration?
Tim Urling

01-13-2003 Over year old.

Billme
Key Veteran
Location: MS

Is the tail moving up and down, or side to side?

01-13-2003 Over year old.

turling
Heliman
Location: Idaho Falls, ID

side to side

The tail moves side to side.

01-13-2003 Over year old.

Thomas L Erb
Veteran
Location: Alliance ohio

Tim what tail hub are you using and is this vibration in the fins and or skids or canopy. also and is the vib speed fast or slow the speed of the vib will often tell where to start looking for problem because it will usually vib at the same speed as what is causing the problem. Tom

01-13-2003 Over year old.

turling
Heliman
Location: Idaho Falls, ID

Vibration

Thomas,
the vibration is definitely in the fins. And, it seems to be especially evident during hover speeds. I just can't figure out where it is coming from.
Tim

01-13-2003 Over year old.

Billme
Key Veteran
Location: MS

Tim,
I know you are at a high altitude, also you don't have much fuel thru it...

Side to side is a rich condistion, unless you have your gyro gain to high.
How did you mix the oil, how much?
Do you know what RPM your running?

First, look at your plug, see what color the ceramic is inside the plug..

second, move the stick to where you are hovering, and tell me your throttle % open at hover

Side to side is not a bad thing with this setup.. This is part of learning the gasser
.You don't want to lean it to where you get rid of it totally with less than several gallons thru it, but you can minimize it, if you are running the correct amount of oil....
If you want, you can call me, so we can confirm your settings..
If it is rich, since you are already at the minimum on the low, you can lean the high in this case, but first, answer the questions above..
Regards,
Bill

01-13-2003 Over year old.

Thomas L Erb
Veteran
Location: Alliance ohio

Tim Im gussing that the shake could be engine related . ie engine running rugh at hover or gyro gain to highor gyro mount loose or to soft. Try this first change hover speed rpm up and down and look for any change in vib. check if engine is running smooth. Im not sure about the needle setings . i had a gasser about 5 years ago but i dont remember what my settings were. its been my experiance that a side to side vib usually is engine or gyro or bearing related. look at the speed of the vib .if really fast could be bearings or tail balance ( tail drive is fastest thing spinning on that machine around or above 10ooo rpm) if medium speed probably engine related (this one likes to mess with the gyro , around 7 to 8,ooo rpm also tail linkage slop ) if slow it could come form a head related balance problem (slowest spinning thing on that machine around 1500 rpm) hope this helps Tom

01-13-2003 Over year old.

Billme
Key Veteran
Location: MS

ok,
I thought you said the tail was moving side to side....Its the fins vibrating, you say

I'll let Thomas finish helping you...
Regards,
Bill

01-13-2003 Over year old.

Thomas L Erb
Veteran
Location: Alliance ohio

hay bill dont go away tim needs the engine setting info that i lack . I think you are on the right track This is also a good reminder for me tom

01-14-2003 Over year old.

Billme
Key Veteran
Location: MS

No problem Tom

you said his problem..
With this setup, and the information given, Tim you are either running to lean on the low, or running to high engine speed.....The old stock PUH is critical on overspeeding (not as bad with the new carb)
I will be glad when everyone gets one of these new engines coming out.. This problem will be solved, if you set it up right mechanically..

Just lower the headspeed till you see a smooth spot, if its still shaking at 1600 to 1650, your lean on the lowend...Richen up a 1/32 at a time on the low needle

Tim, if you will answer the question from my first post, it would be helpfull

Tom, you done good..You need to get back in gassers, its a whole new ball game now with the new engines..
Regards,
Bill

01-14-2003 Over year old.

Thomas L Erb
Veteran
Location: Alliance ohio

Bill COMING SOON (maybe) GASSER FURY!!!!!!!!!! who knows nothings impossiable

Tom (except my spelling)

01-14-2003 Over year old.

Billme
Key Veteran
Location: MS

I'm collecting cans on the side of the road now

It want be long now! Where have I heard that?
Take care ,
Bill Meador

01-14-2003 Over year old.

helicenter
Senior Heliman
Location: Winter Haven Fl.

roadside cans

Hey Bill, what is the can market in your area? I have got to tell you this--for months now there has been a guy picking up cans on the road that goes by my office, well a couple of weeks ago I seen him loading the cans in his 2000 silverado, I also know where he lives now , NICE.

By the way my new RC230 engine is sitting on the bench by an engineless Century Hawk----what do you think?

Doug

01-15-2003 Over year old.

reefguy
Senior Heliman
Location: palmdale california

x-cell gaser shakes

hello, mr. billme, and other experience pilots, i have a new x-cell 1005 gasser, with about 4 tanks run thru it now, futab super8u, 9202's 401/9253, g23, stock air, exhaust, got this gasser from original owner, he ran only two break -in tanks and i did two more so far, i ran one tank with no main blades, no headloaders, original owner had it way to rich, plug was oily black, i reset the high and low on carb per bill/setup, plug is nice and tan now, when i rev up abit no shakes, just the normal when the heli is picking up headspeed, after putting on the mains, 700mm rotosport previously balanced from original owner, when reving up to idle the heli, pretty much shake vigorously, left to right, up/down about 1/2 to 3/4 inch, even in hover you can tell it is vibrating, i wanted to check the blades and complete head with blades, of course i do not know where to start on that, i do have a du-bro hight point balancer, do not if it is usable in this situation, could you help me in pointing out what to look for to cure the shakes, could the g23 carb. setup be the problem? it does hover beautifully and stable,but the shakes i can do without , and 401 was doing its job, thank you,, anthony.

i wish i could get some hands on pointers from an experience pilot, but where i live in palmdale calif., kinda no one around..

02-15-2003 Over year old.

Moore
Senior Heliman
Location: California 93094-0940

Larger tail rotor blades ???

If you have replaced your stock tail blades, that could be your problem. You should stick to manufacturers specs on tail blade size. Too large a blade disk, with a corresponding blade mass, can lead to overloading your gearbox unless it's rotational speed is reduced. Excesssave rotating mass in the tail rotor can also cause unwanted oscelations in the tail.

02-15-2003 Over year old.

reefguy
Senior Heliman
Location: palmdale california

vibs

you mean the size of the tail blades could make the whole heli vib? i think they are the stock ones(black), i do have a set of funky carbon 105mm, do you think changing them will cure the problem. thanks. anthony.

02-15-2003 Over year old.

willyjoe73801
Heliman
Location: oklahoma

um, changeing blades.

Just got though stoping the tail vib on my gasser and was in the tail blades.. My gasser had the fact. blades black on them and i changed to centruy Tur Tail Baldes .60 size. All the vib went away. But right about what size you put on ..will have lots to do with the way she flys like he said. Good idea to stay with what the heli come out with .. Unless you up-grade ,, then thats something diff too. But i was lucky, was just my tail blades not bal.

Like cutting up the grass with the tail end.. hehe

so have fun and don't for get to>>>BRAKE A BLADE>>>

02-18-2003 Over year old.

reefguy
Senior Heliman
Location: palmdale california

vibs

willy, do you know the if the ones you got are 105mm, or do you know specs of those tail blades, would like to try some, the ones that i got from the original did not mention it to me, but the main blades right now are rotorsport pros 700mm, i do not know if these are factory, owner did not mention it, would not deal with him ever, even talking, tried to scam me in the heli purchase, but thats another story, thanks...

02-20-2003 Over year old.

willyjoe73801
Heliman
Location: oklahoma

Tail blades

HI guy, well on my main blades i have 680mm and i think thats stock for my gasser. and the tail blades are 60 size and the # to the tail blade is #cnfs072p form century. There nothing special about the tail blades just .60 size is all. I did fine that the tail blades from century are little shorter and not as wide.. But what made me put them on or order the tail blades is that my vib. in the main was so bad . so i bought a new set of mains fiber glass not the hi dollar ones be a good cheap set .. with the new ones i got read of the main blade vib right away. I got lucky again. so then when i started her up again i seen that the tail was really bad. So i order the # that i gave up from century. ..wow i got lucky, it cured my prob all together. I think every one around me is flying 700mm or better. But ,, im still learning how to fly and not ready for the bigger blades yet.. Hope i helped you on this.. If you need to go to century's web. here is the address. I hope i have helped you.. I learn as i go here. But so far im haveing lots of fun.. www.centuryheli.com.

So have fun and Don't for get to <>

02-20-2003 Over year old.

reefguy
Senior Heliman
Location: palmdale california

vibs

willy, thanks for the reply, then i take it that your problems, was main blades and tail blades out of balance. thanks, i probably will order some. anthony.

02-20-2003 Over year old.

2 pages [ << < ( 1 ) 2 NEXT >> ]

1107 views

POST REPLY

Heli Wholesaler	.	3D Heli Depot	.	JR-Spektrum
	.		.

Gasser Model RC Helicopters > X-Cell tail vibration

PRINT TOPIC

Advertisers

Subscribe to This Topic