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250 Aftermarket Upgrades 250 Aftermarket Upgrades


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Old 01-29-2009, 07:27 AM   #61
Ted U
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Old 01-29-2009, 08:14 AM   #62
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Quote:
Originally Posted by BrockJ View Post
The 500 and 600 Kasama pieces are dead on.
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.

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Old 02-02-2009, 03:07 AM   #63
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Default TREX250 Tail analysis, spacer upgrade and Chinese weights Reply to Thread

Everyone,

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


Thanks.
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Old 02-02-2009, 11:52 AM   #64
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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.
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Old 02-02-2009, 12:42 PM   #65
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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?
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Old 02-02-2009, 05:11 PM   #66
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I'm very sorry for the STUPID question But where can I get this mod from?

Thanks,
Shaun.
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Old 02-02-2009, 06:00 PM   #67
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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
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Old 02-02-2009, 06:12 PM   #68
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Thanks for the info...I'll be sending you a PM

PM sent.
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Old 02-02-2009, 11:31 PM   #69
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Old 02-03-2009, 02:18 AM   #70
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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?
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Old 02-03-2009, 05:00 PM   #71
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Ordered a set of bearings from boca mr681x hope they are the right ones.
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Old 02-03-2009, 08:10 PM   #72
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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

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Old 02-03-2009, 09:00 PM   #73
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Quote:
Originally Posted by HEIM JOINT View Post
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
I 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....
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Old 02-03-2009, 09:51 PM   #74
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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.
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Old 02-04-2009, 12:35 PM   #75
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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!

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Old 02-04-2009, 04:04 PM   #76
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www.rcflightstore.com has the gaui bearings you are looking for.
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Old 02-05-2009, 12:23 PM   #77
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I've sendt a PM ages ago, and you said it should be ready for shipping within february 1'st, still no invoice?

Any updates?
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Old 02-05-2009, 01:00 PM   #78
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Quote:
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I've sendt a PM ages ago, and you said it should be ready for shipping within february 1'st, still no invoice?

Any updates?
Sorry for the delay. I am working thru hundreds of orders you will see an invoice in a day or so.

Thanks for everyones patience, HJ
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Old 02-05-2009, 01:18 PM   #79
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Sorry for the delay. I am working thru hundreds of orders you will see an invoice in a day or so.

Thanks for everyones patience, HJ
Thanks for the update been wondering what was going on with these cant wait to get a set .
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Old 02-05-2009, 06:26 PM   #80
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Quote:
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Sorry for the delay. I am working thru hundreds of orders you will see an invoice in a day or so.

Thanks for everyones patience, HJ
Shure, no problem, as long i'm not forgotten
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