Red head dampeners

[2fast4-u]

Hi guys Presently I am using the blue head dampeners in my rap 50 and everything is fine with them up to any headspeed I want. I put a set of the red damp in, and brought the headspeed up to 1500 no problems except that any speed after that the heli starts to progressively shake more and more as the headspeed increases.

i install all the dampeners dry and was wondering because of the stiffer rubber if I should not maybe apply a little silicone grease. Never had a problem before, and don't know if it would be a reccommended fix.

So oppinions are welcome :roll:

[blakka_1]

thats ur problem dude - you put them in dry.

you gotta really get them lubed up, and i mean really lubed up, lub both dampers completly, and generously. put them back in your heli crank the headspeed up to whatever you want. then go fly.

[lanniebaker]

i aint saying the above post is wrong but you need to check out other mechanics also b4 really spooling up you could have put something back on wrong....did you make sure to put spavcers between grips and headblock back on the feathering shaft??

just double check everything after lubing up dampners

[2fast4-u]

I will give the lube thing a try, because I am sure it is together properly, What is a good reccommendatiin for lube?

thanx

[claysmith]

I use either a silicon or a lithium grease on the dampners. That should fix your problem.

[Mike Fortin]

Can you use Vaseline?

[blakka_1]

vaseline evaporates after a period of time. just like it does on your lips. probably last 1 flight

[Galifrey]

Dont use any petroleum based product on the dampers or they will be worthless in no time...

By far the best lube for dampers is Kyosho Silicone Diff oil (for 1/8th buggies) 50,000wt is what I use...

It is also superb for tail boxes and many other applications...

Just one word of warning tho, this stuff is really offensive if you get it on your fingers, it feels horrible, doesn't hurt just feels icky...

Lots of soap to wash it off...

It has the consistency of unset zap-a-dap-a-goop

Use it well and avoid the horrible nodding associated with tight dampers

:D

[S.Peterson]

Just go to an auto parts store and ask for dielectric grease. It is silicone grease and will work great.

Stu

[2fast4-u]

I put the original blue dampeners in dry and i can really wing the head up again, but I would really like to give the red dampeners a second chance so I will check out the auto store for some dielectic greade this weekend, between the new dampeners and the white ma 20g paddles, I think I should have some fun

thanx

[OC Bob]

Just a couple of questions.

After you put the heavy dampers in, were you flying off of grass or hard surface? Did the helicopter shake, or was it actually dancing around on the ground right before liftoff?

Off of hard sufaces with a nice tight head, or with very heavy dampers in the Raptor 30 or 50 helicopter heads the helicopters, even when balanced well, will dance as you lift off when passing about 1500 to 1600 RPM. This dance as I call it gets progressivly better depending if you are flying off asphult, dirt, short grass, or tall grass, then smooths right out as you lift off if the blades are tracked.

This dance is actually called "ground resonance", and happens more the tighter the head assembly is. We use to eliminate most of it by placing rubber between the skid cross struts and frames, and rubber on four corners of the skids themselfs. The Raptor 30 and 50 helicopters flown off hard surface display ground resonance the worst of any model helicopter we have been playing with so far, at high rotor speeds right before lift off. It appears to be just a case of the right head firmness, and simply the general design of the raptor helicopter landing gear.

We no longer pay any attention to it, and fly mostly off of grass. As the Raptor comes up to speed in the grass this ground resonance will start with many of these helicopters at around 1750 to 1900. After the skids leave the ground, the resonance of course completely stops.

I was just curious if this is what you actually experienced, and described it as a shake, after installing the heavy dampers. In many cases there really is no practical way around this ground resonance, with some of the Raptor 30 and 50 helicopters, when flying off of a hard surface like concrete or asphult. It happens on softer ground here and there as well, but is most pronounce when coming up to lift off rotor speed on hard sufaces. Thanks.

OC Bob