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View Full Version : TREX250 Tail analysis, spacer upgrade and Chinese weights


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tweav
01-06-2009, 08:19 PM
Yes I want both the weights and a spacer kit . When ever you get them ready . I did throw a few washers between my bearings and it did fix some of the slop , but I'd rather just fix it and be done with it. I'll take a set of weights for a 500 too.

OICU812
01-10-2009, 11:55 PM
Getting towards mid Jan, getting excited! :D

cbrian4
01-11-2009, 01:39 AM
Are you going to put up an order page or de we PM you? Also, do you take paypal?

kkent25
01-23-2009, 11:03 AM
What ever happened to these???

HEIM JOINT
01-23-2009, 11:12 AM
Are you going to put up an order page or de we PM you? Also, do you take paypal?

Pm me for now. I will have a web store soon.:)

Thanks, HEIM JOINT

HEIM JOINT
01-23-2009, 11:13 AM
What ever happened to these???

Spacer sets are in stock. The weights will be ready to ship feb 2

Thanks, HEIM JOINT

Roadrune
01-23-2009, 01:24 PM
Spacer sets are in stock. The weights will be ready to ship feb 2

Thanks, HEIM JOINT

Will you have enough for "everyone" then?
Do you also have the 600N weights in?

HEIM JOINT
01-23-2009, 02:52 PM
Will you have enough for "everyone" then?
Do you also have the 600N weights in?

Yes plenty for everyone. :) 600 and 700 Stock plastic and 600 and 700 kasama are in stock. 600/700 allign metal several weeks away

HEIM JOINT

BrockJ
01-26-2009, 10:29 PM
The 500 and 600 Kasama pieces are dead on.:banana
Perfect balance.

Post the website info soon as you get it...

Are you making anything for the 450's?

Thrashaero
01-27-2009, 03:41 PM
can we make this a sticky? This should be a sticky. I've entered too many tail servo conversations without knowledge of this only to deliberate over finding any servos with more torque for the same basic cost/size/close-to-speed of the specific-designed tail servos (JR, INO LAB, etc) when those are just fine.
This is a mystery this isn't entirely standard by now, with servo manufacturer's apparently already of the idea that little torque is needed...the heli manufacturer's go with it not realizing that lots of torque, per their own design, is really needed and needs modded..the right way..instead of leading people to go sprawling off into massive servo overkill territory

Ted U
01-29-2009, 07:27 AM
TTT

HEIM JOINT
01-29-2009, 08:14 AM
The 500 and 600 Kasama pieces are dead on.:banana
Perfect balance.

Post the website info soon as you get it...

Are you making anything for the 450's?

Hi Jim, I have not forgotten you.

Yes 450SA and 450 SE V2 are available around feb 2.

HJ

Michaf@mac.com
02-02-2009, 03:07 AM
Everyone,

Could you just describe as to how the issue translates into the flying behavior?


Thanks.

BrockJ
02-02-2009, 11:52 AM
In the simplest term. It's takes the load off of your tail servo and allows it to work less, hold it's position easier and transition faster.

Michaf@mac.com
02-02-2009, 12:42 PM
What I'm noticing is that I can't set the tail right. It starts wagging at 60-65% Gyro gain. Could that tail issue be the cause?

Bart101
02-02-2009, 05:11 PM
I'm very sorry for the STUPID question:thumbdown: But where can I get this mod from?:oops::oops::oops:

Thanks,
Shaun.:banana

HEIM JOINT
02-02-2009, 06:00 PM
There are no stupid questions.

PM me with:
what size (T250 T500 etc.)
what type (kasama, Align metal or stock plastic)
quantity,
your name & shipping address
email address

Thanks, HJ

Bart101
02-02-2009, 06:12 PM
Thanks for the info...I'll be sending you a PM:banana

PM sent.

riccardoc
02-02-2009, 11:31 PM
PM Send

felborn
02-03-2009, 02:18 AM
Anyone heard anything about this? Sent a PM over a month ago, but have not heard anything yet. Am I in the queue or do I need to resend my PM? :)

Winchcat
02-03-2009, 05:00 PM
Ordered a set of bearings from boca mr681x hope they are the right ones.

HEIM JOINT
02-03-2009, 08:10 PM
Ordered a set of bearings from boca mr681x hope they are the right ones.

681X is the right size to use with the preload spacer set. You need 4 bearings total, 2 per grip. The Gaui #203250 bearings (2 per pack) are working great on my 250 and are relatively inexpensive (less than $5.00 for the pack of 2). I am using a JR290 on the tail with a spartan gyro and the tail is very solid with no wag. My ball on the tail servo is at 4mm from the center. I am no expert but I think this is where some people are missing it on the mechanical setup. The 250 tail pushrod only moves about 5.5mm for the total pitch range. you want your servo to at least move 45 degrees each direction to accomplish that travel and 60 degrees would be ideal.
So 5 mm total travel = 2.75 mm one direction divided by the sine of 45 = 3.9mm ball distance on the servo. You need resolution more than speed

HJ

gixxerjeff
02-03-2009, 09:00 PM
681X is the right size to use with the preload spacer set. You need 4 bearings total, 2 per grip. The Gaui #203250 bearings (2 per pack) are working great on my 250 and are relatively inexpensive (less than $5.00 for the pack of 2). I am using a JR290 on the tail with a spartan gyro and the tail is very solid with no wag. My ball on the tail servo is at 4mm from the center. I am no expert but I think this is where some people are missing it on the mechanical setup. The 250 tail pushrod only moves about 5.5mm for the total pitch range. you want your servo to at least move 45 degrees each direction to accomplish that travel and 60 degrees would be ideal.
So 5 mm total travel = 2.75 mm one direction divided by the sine of 45 = 3.9mm ball distance on the servo. You need resolution more than speed

HJI agree,and it seems like a lot of poeple are just using the closest stock servo arm hole which is usually like 7 mm from center.The gyro and servo will have a hard time not wagging with normal amounts of gain.Mine is set up at 5mm,and Im just short of 45 deg of movement each way,and holds good.Im going to make up a new arm at 4 mm if possible to increase my resolution and hopefully gain also....

ryem3
02-03-2009, 09:51 PM
So where are those Chinese weights? I'm counting on those suckers to save this little guy. I'm running the 290 as well now and am hoping that I won't need to mess with the big servos anymore.

pootman
02-04-2009, 12:35 PM
Anyone know who has those Gaui bearings (1.4x4x1.2) that's used to replace the stock Trex bearing? They seem to be out of stock everywhere. Almost done with my buddies Trex250, looks like a very nice little heli!

pootman