RunRyder RC
WATCH
 1 page 4383 views POST REPLY
Home✈️Aircraft🚁Helicoptere-AlignT-REX 250 › T-Rex 250 Build Tips Please
04-13-2009 05:25 PM  10 years ago
Topic Vote0Post 1
JAC

rrApprentice

Birmingham - UK

MyPosts All Forum Topic
T-Rex 250 Build Tips Please
Hi all, going to pick up a T-rex 250 Super Combo tomorrow, should be a later kit with the metal tails pulleys and I'm getting the new counter balanced tail hub/grip assy too. I've also ordered a few spares etc. and the metal tail control arm to go with the grip assy. Are any further upgrades necessary for the 250? Also trying to find pinions that have a grub screw, the only place I can find in the UK to sell them is Fast Lad but I think they are out of stock of 15T & 16T's at the moment. Not sure which to use yet though, 15T or 16T?

Build wise, is there anything I should pay particular attention to (apart from the tail area). Any build tips/comments would be greatly appreciated.
Thanks
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-13-2009 05:29 PM  10 years ago
Eric L

rrApprentice

Minnesota

MyPosts All Forum Topic
i would try to get a hold of a thorp .9 mm allen

the screw heads strip very easily so dont over tighten, other than that, have fun with it
Team KingKongHobbies.com-----Team Synergy
SHARE  PM  EMAIL  Attn:RR  Quote
04-13-2009 05:34 PM  10 years ago
Riq

rrKey Veteran

ND

MyPosts All Forum Topic
+1 on the .9mm thorp.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-13-2009 05:34 PM  10 years ago
JAC

rrApprentice

Birmingham - UK

MyPosts All Forum Topic
Thanks Eric, I take it the supplied Align 0.9mm driver isn't too good then?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 12:28 AM  10 years ago
Quandumphone

rrApprentice

Yuma, AZ

MyPosts All Forum Topic
If you are just going to fly around, the 15t is fine. If you want to do any sort of aerobatics, go straight to the 16t pinion. You don't need a grub screw, the stock pinion holds just fine with the supplied glue. I was sceptical at first but it really does hold.

Get some sort of carbon blades for aerobatics. The Align 206D's are very good. Use either the 40mm or 37mm batman tail blades. Do not use the larger 43mm rectangular tail blades.
SHARE  PM  EMAIL  Attn:RR  Quote
04-14-2009 02:56 AM  10 years ago
Eric L

rrApprentice

Minnesota

MyPosts All Forum Topic
, I take it the supplied Align 0.9mm driver isn't too good then?
correct..the stock .9 is horrible

you can use it, but it gets rounded off after about 10 screws
Team KingKongHobbies.com-----Team Synergy
SHARE  PM  EMAIL  Attn:RR  Quote
04-14-2009 04:00 AM  10 years ago
Riq

rrKey Veteran

ND

MyPosts All Forum Topic
Ive used all the tail blades with stationary/piro flips/rolls etc....As well as with the plastic align blades,,,on a 15t. Its not impossible, even easier then a 450 with the stock stuff..... and a mini, not micro gyro servo. Its a really great bird.

But, with carbons, it gains noticeable pop...and..16t...more pop, less effort in the sticks, therefore more fun.

This little bird in stock form isnt bad, and can do a lot...BUT, its so cheap and easy to upgrade...so why not?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 05:17 AM  10 years ago
chopper_crazy

rrElite Veteran

Delphos, Ohio

MyPosts All Forum Topic
definately get a MIP tool and there was one other thing....oh yeah, I magnifying glass definately build it on a towel so screws don't bounce off the table.It's a complex, costly, glow powered anti-gravity machine!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 06:38 AM  10 years ago
Mr Scout.

rrNovice

milpitas,ca,USA

MyPosts All Forum Topic
Put a good gyro and tail servo.thats the key to the Trex250.the rest,stock should be fine.BTW..alot of feathering shaft w/spacers!!.
SHARE  PM  EMAIL  Attn:RR  Quote
04-14-2009 12:51 PM  10 years ago
gmcullan

rrKey Veteran

Southbridge, MA

MyPosts All Forum Topic
Check the fit of the control ball links. I have two of the super combo's. Both helis required sizing the ball links. This is almost a requirement unless Align is shipping different links with the kits.Gerry Cullan,
Gaui 200, 255; T-Rex 250, 450 SE & SA, Mini-Titan, Blade 450
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 02:34 PM  10 years ago
Eric L

rrApprentice

Minnesota

MyPosts All Forum Topic
the gyro is actually a very nice one that it comes with

the servo is the only real downfall, throw a 9257 or 3500g on there and the tail holds perfectly
Team KingKongHobbies.com-----Team Synergy
SHARE  PM  EMAIL  Attn:RR  Quote
04-14-2009 06:35 PM  10 years ago
Hughes500Pilot

rrKey Veteran

Anaheim, CA

MyPosts All Forum Topic
Why pay $12 for a MIP/Thorp .9mm hex driver when you can pay $4 for a Whia .9mm hex driver. It's part number 26309. The quality of Whia tools is very good.

Here are some tips from when I built mine:

1. Build your helicopter on a cloth or towel. I used a yellow hand towel. If you drop a screw, it is easy to see against the yellow background. And the towel keeps the screw from bouncing away.

2. Carefully remove each screw in the rotor head and tail box, one at a time. Then put thread lock on each one and put them back. I found several that either had no thread lock or not enough to do the job.

3. Size your ball links - especially the two tail rotor ball links. Instead of buying a "special ball link sizing tool," just look in your spare/extra parts bag that is included. You will see some extra balls. Take one and thread it into the spare metal spacer rod. It's the one that is round in the middle and has hex shapes on each end. Now use an xacto knife and score the ball in several places. The scores do not have to be too deep (unlike what some people say). Now put that ball with the metal standoff in a Dremel tool or a drill and snap on your ball link. Be sure the "A" on the link is the top. Spin the ball with the dremel tool and push the link forward and back and from side to side (but not up and down - as if you are goiing to remove the link). Do this for about 3-4 seconds only, or too much heat will build up and warp/melt the link. You will find the link is now pervectly sized...

4. This takes a little test and fit. You will need to cut the bottom of your canopy in order for it to fit correctly with the battery installed. I used a Dremel tool to make the cuts. Take your time and do it right and it will be a perfect fit. Here is how mine turned out.

5. A set screw pinion is not necessary. Plus, unless you file a flat spot for the set screw to rest in, whats the point? And before you make a flat spot, have you noticed the how thin the shaft is? And that the shaft is hollow??? My 250 has about 100 flights so far and the pinion is holding fine. I just use the included glue (the green one) and let it sit for 2 days so the clue could cure before I touched the motor. My only concern is the glue is TOO STRONG and may make removal too hard.

6. Do not pull the tailboom out too far and make the tail belt too tight. If you do, you will wear out your counter gear bearing. It should only be tight enough that the belt does not slip.

7. This should go without saying... But do not overtighten the screws. The thread lock is there to keep them from falling out.

8. As you put in the main mast, loosen the 8 bolts for the 2 main mast bearing blocks. Once the main mast is in the bearings, tighten the 8 screw (WITHOUT THREAD LOCK). This keeps the bearing blocks aligned correctly. Now, while keeping the main mast in place, remove one screw at a time and apply thread lock and tighten it up.

9. Take your time and route your servo / ESC wire so they do not interfer with anyting. At the same time, take a little pride in your heli and make it look nice. I made this little box to "hide" my extra wires. It only adds .18 grams to the heli and took 5 minutes to make.

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 06:49 PM  10 years ago
electricdurango

rrVeteran

Sterling, VA

MyPosts All Forum Topic
Why pay $12 for a MIP/Thorp .9mm hex driver when you can pay $4 for a Whia .9mm hex driver. It's part number 26309. The quality of Whia tools is very good. -Steve
That is the exact same driver I just bought a few days ago at grandrc. It is a very nice unit with a very hard tip on it. $4 is the way to go.

My name is also -Steve. LOL.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 10:28 PM  10 years ago
JAC

rrApprentice

Birmingham - UK

MyPosts All Forum Topic
Thanks all, especially Hughes500pilot for your detailed help.I got the kit today and will hopefully start the build tomorrow. It is a later kit with both metal tail pulleys and 1.3mm hex screws now instead of the 0.9mm.

Just to confirm, when I size the ball links, should the A or Align be facing me?

Thanks again.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
04-14-2009 10:36 PM  10 years ago
Hughes500Pilot

rrKey Veteran

Anaheim, CA

MyPosts All Forum Topic
Well, both... The small single links only have an "A" on them. The double links say "ALIGN" on them. You want to put the link (wether its the single type or double type) so the "A" or "ALIGN" is the top, fcaing out.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 4383 views POST REPLY
Home✈️Aircraft🚁Helicoptere-AlignT-REX 250 › T-Rex 250 Build Tips Please
 Print TOPIC  Make Suggestion 

 5  Topic Subscribe

Monday, September 23 - 5:44 pm - Copyright © 2000-2019 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online