Ronald Kessler
Member
Does anyone know where to get the Chinese weight and especially the shim kit for the tale of the 250 T-Rex
250 Chinese Weights
- Thread starter Ronald Kessler
- Start date
Ronald Kessler
Member
They just call it Chinese weights actually it's really used on real helicopters what it is is either a longer tail grip bolt with a nut or two nuts on it the side closer to the hub is the weighted side. Micro Heli sales weighted blade grips for the 180 cfx what it does is makes the amount of force the servo has to give to pull the linkage like 50% less I don't know the scientific numbers but there's a lot of videos out on this I don't know how to link a video but there's some real good ones from the engineer Rob renz. He also has a video on a crushable spacer for the tail grip Hub to take all the slop out of the T-Rex 250 it's a preload little shim kit and I'm told that works amazingly well
ChopDrifter
Member
do you have a pic of your current tail grips, cause if they are the weighted grips there's no need for the Chinese weights(waste of $$$). Just make sure you have a fast, strong decent tail servo.
Ronald Kessler
Member
I can't send you a picture till I get home but I'm positive they're not the weighted ones it's a stock 250 Pro DFC combo kit I believe the tale Servo is a 425 m digital Servo there's hella slop in the blade grips and the servo Rod is like unbelievable hard to pull back and forth
ChopDrifter
Member
yeah try your best to take out any binding and minimise any slop as much as you can. Everything should be silky smooth
Ronald Kessler
Member
It was a helicopter somebody put together and sold on eBay they said all it needed was a gyro it was put together and servos were installed everything looked great and after further inspection of the tail close up I noticed there was screws loose and I started checking nothing was locked tided I took it all apart turns out it had a notchy swas plate bearing and some other things were kind of not right after I tighten the screws up and locktite everything . the tail grips has no play whatsoever so
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ChopDrifter
Member
Those are the weighted tail grips, no need for chinese weights
Ronald Kessler
Member
Thanks I appreciate that
murankar
Staff member
Those are the Chinese weights. When someone refers to Chinese weights that's what they are talking about, counter weighted tail blade grips.
Those became popular back around 2012ish . Align was a huge proponent of those. Not sure why because they don't after any advantage. If they do then I feel it's minimal at best.
Those became popular back around 2012ish . Align was a huge proponent of those. Not sure why because they don't after any advantage. If they do then I feel it's minimal at best.
ChopDrifter
Member
Yeah the Chinese Weights were suppose to reduce the racket effect(force) on the tail. As you said it was introduced a very long time ago, back then there wasn't much Strong, Fast, Small servos available, and because of this people were using weak servos that would burn out or die early in the game. Hence the Chinese Weights came along. Now days there's a lot of small,fast, strong servos available so these servos can with stand these forces. The Align weighted grips did drop the force by 10%, but in today's big choices of servos, it's no longer a requirement. Here's a pic of a trex 250 using a HUGE tail servo, to with stand the racket effect.
It's a 500 size mini servo
It's a 500 size mini servo
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ChopDrifter
Member
Forgot to mention it's Bert Kammerer's Trex 250. The Owner of BK Servo
ChopDrifter
Member
nice