RunRyder RC
 12  Topic Subscribe
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2365 views
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Chinese weight mod on gassers
12-27-2008 03:15 AM  8 years agoPost 21
Forced_Inductio

rrApprentice

Camrose, AB

My Posts: All  Forum  Topic

The chinese weight mod is used to counteract the "centrifugal returning momentum" (i heard someone else call it that) of the grips only. then the servo only works to move the blades. there will be some force required to move the blades, but it compounds if the servo is working to move the grips as well. if you have a 450, try it. i was absolutely shocked.

PM  EMAIL  GALLERY  Attn:RR  Quote
12-29-2008 02:52 PM  8 years agoPost 22
j.8

rrVeteran

Denmark

My Posts: All  Forum  Topic

Hi

I have done some amp tests, all 3 without blades
Headspeed aprox. 1750 rpm
Tail servo JR 8900
MA metal blad grips
Test: flipping rudder stick from rigth to left constantly
No weight 620 mAh
Original bolts 590mAh
Weights 500 mAh

As others have found out, the weight mod will
reduce the servo load, since I have only tried
one pair of weights, it is most likely, that
differends ones will reduce the amps even more.

But I belive only a fligth test will show the
real results, but with what I have seen sofar,
I will let the weights stay on, and if a reduction
of the servo gain is nessary, it will,
I think, indicate that the gyro have become
more "efficient"

BTW weights, pretty simple 30 mm axle, standoffs and
locknuts
Regards Bo

PM  EMAIL  GALLERY  Attn:RR  Quote
01-06-2009 01:47 AM  8 years agoPost 23
Yug

rrMaster

UK. Herts

My Posts: All  Forum  Topic

'ello all. Just want to point out that tuning of the weights requires the inclusion of both the grips AND the blades. After extensive experimentation, I've found that the combination of both dramatically effect the final optimisation. It is no use finding the optimised weight for just the grips as the inclusion of the blades has a not unsupprisingly dramatic impact on the TR dynamics as a whole.
Regarding the impact this has on a 90, yes same rules apply, depending on how your purist drives are manifest Basic physics provail without regard to the scaling.

Vegetable rights and Peace

PM  EMAIL  GALLERY  Attn:RR  Quote
01-06-2009 01:20 PM  8 years agoPost 24
j.8

rrVeteran

Denmark

My Posts: All  Forum  Topic

Hi Yug

Thanks for sharing your experience, I will try
with blades on ( makes sence )
I will have to make a differend setup, due to
the thrust

Regards Bo

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2009 06:34 PM  8 years agoPost 25
kaon

rrNovice

Singapore

My Posts: All  Forum  Topic

One-sided?

On my heli, I can approximate the mod, on one side by using a too-long M3 screw with an additional nylock nut.

I tried feeling for the pitch change force with the main head removed, and with the engine running up to about half throttle.
There was not much noticeable improvement, but it wasn't worse either.
It has flown without issues too.

PM  EMAIL  Attn:RR  Quote
01-14-2009 07:04 PM  8 years agoPost 26
j.8

rrVeteran

Denmark

My Posts: All  Forum  Topic

Hi kaon

The weights that both you, and I have made, are not
heavy enough to reduce the force all the way down.

Take a look at theise blade grips with the weigths
integraded, they are made for Maxi Joker ( big electric )
and the only reduce the force by aprox. 25 %.

Regards Bo

PM  EMAIL  GALLERY  Attn:RR  Quote
01-14-2009 07:52 PM  8 years agoPost 27
bosshoss

rrVeteran

Chicago, IL

My Posts: All  Forum  Topic

So just how much do you need? In grams.

Couldn't you stack the nuts on the bolts , for more weight.

At some point though a grip like that Joker tail grip is what I want .....with the right amount of weight.

I get nervous looking at doppelgangers hanging off the grip bolts...............

I have been watching and reading this thread with great interest. I would love to setup a test rig to prove it to myself.

Why Hover a Yak, when a Heli does it better?

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
01-14-2009 08:43 PM  8 years agoPost 28
j.8

rrVeteran

Denmark

My Posts: All  Forum  Topic

Hi

"...I would love to setup a test rig to prove it to myself..."

It is allways a good thing to be sceptical, when reading
about others experiments.

Well I think the ideal weight would reduce the forces at
"hover, tail pitch possion" to a minimum.

"So just how much do you need? In grams."
Well I can`t even tell you how much I have
put on ( I don`t have a scale that precise )

Only thing thing I can tell you is that, with
my finger force gauge It feels alot
easyer to move the push rod with the weights on,
than without.
I used same setup as the picture of Yug`s setup.
And I could measure an amp reduction of 120 mah,
not much, but...

Regards Bo

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <     1     ( 2 )    >    >> ] 2365 views
Scorpion Power Scorpion Power
HelicopterGasser Model RC HelicoptersOther › Chinese weight mod on gassers
 Print TOPIC  Make Suggestion 

 12  Topic Subscribe

Thursday, November 23 - 12:16 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online