Belt CP - Compatable Parts

[DierWolf]

News to me bub... Far as i know both sides of the thrust bearing has the same inside diameter..

Think your confusing what they are talking about, first one you put in the groove has to be facing out the grip, then the bearing then the last one with the groove facing inside the grip..

Remember these are chinese/japanese writing these books..

If you can give me page number where you read that would be great.

[DierWolf]

Ok

They are using the word Aperture...

Definition : An opening, such as a hole, gap, or slit.

In this Case a Gap (Gap in the thrust bearing washer)

I cant see clearly on the PDF but the picture shows (on the left grip) on page 38 (un-numbered)

Screw then thrust washer (with gap facing up, or larger Gap up) then Bearing then Thrust washer (with gap facing down, or No/smaller Gap facing up)

So they are really not talking about Diameter simply the gap. and naturally the bearing has to ride on the Gap on both sides..

Unless of coz i am totally wrong and there is a diameter difference in 2 of the thrust washers, which i never noticed and never paid attention to how i put them in and never had a problem

[psilo]

I can't check as I am in Kuwait at the moment. BUT, I believe that they do have 2 different internal diameters.

[unwind-protect]

Internal? Don't know about that. External, yes. One of the thrust races has a diameter 0.1mm smaller than the other. I didn't believe it until I measured it. I have seen people report tracking problems (no change there...) when they were the 'wrong way' around, whichever way that might be.

For comparison, the thrust bearings supplied in the 3dx450 head don't seem to have this asymmetry. Does anyone know if it's normal for thrust bearings to come like this, or an esky peculiarity?

[DierWolf]

Would seem to be an esky thing, and rather stupid as well.... I must have been a reall lucky person as i have changed over 10 feathering shafts and havent noticed any tracking problems or any other problem... So did i get lucky in putting it in the right way each time by accident??

Or does it all really matter :) Guess follow the book then and put the smaller one on the inside and the larger one on the outside.... Why??? hell if i know :)

[traeside]

Well they way I figured it out was to watch finless’s T-Rex 500 build up. The way he checked that he loaded the larger ID race was to put it over the feathering shaft and rocking it back and forth. The larger one had a lot more slop. I will throw a pair of calipers on them when I get home. My deal in reading or should I say looking that the pictures in the book is that it shows the larger on the inside with plastic grips on page 18



Then for the CNC on page 38 it shows it the other way.

[traeside]

sorry i cant post the pictures from here

[DierWolf]

Would make more sence the one with the more slop goes in first as its will be next to the bearing inside the grip itself.

Like i said either i'm very lucky and put the in right each time, or it doesnt make a damn bit of difference..

I mean what are the odds? i have changed feathering shafts at least 11 times since i got the cnc head, coupled that 11 times by 4 races, very very high odds there that i got it exactly right on both sides Every Single time i did it.

So i believe its safe to say it dont make a bit of difference.

[merlin703]

Dierwolf,
I'm kind of thinking ahead here so I'm not going to do this right now but I do want to be ready when the moment arrives (crash).
If I get (not that I plan but very likely) on a big crash and instead of ordering each part separate. Is there a kit or a kit like will have all the main better trex parts for the Belt-CP? What I mean by this is, if after a crash all main componets break and I will to get pretty much 80% of parts... would it make more sense (cheaper) to get a kit?

I'm looking at this:
1) 450 SE Special Edition All Aluminum
http://www.xheli.com/tg-450-special-edition-helicopter-arf.html

2) This seem to be a not soo good quality but still has all the main componets.
http://www.xheli.com/exi-450-arf-rc-helicopter.html

I guess what I'm looking for is for a body I can get and that I can still use most of my ESKY parts that still work and upgrade with the list you have posted at the beginning of this thread. Let me know if you have any suggestions on packages, thanks.

[traeside]

Would make more sence the one with the more slop goes in first as its will be next to the bearing inside the grip itself.

Like i said either i'm very lucky and put the in right each time, or it doesnt make a damn bit of difference..

I mean what are the odds? i have changed feathering shafts at least 11 times since i got the cnc head, coupled that 11 times by 4 races, very very high odds there that i got it exactly right on both sides Every Single time i did it.

So i believe its safe to say it dont make a bit of difference.
your logic is spot on and i am thinking that your summary is too LOL
i will pull it apart as i need to grease it up a bit and try it both way.
off topic i am going to jump over to the E-smart, do you like yours?

[DierWolf]

Merlin, First of all..

1. Dont buy the Exi TG 450 Special addition, i have spoken personally to Xheli and they say they will not be carrying the parts for it.. and as its not a Trex clone parts may be hard to come buy.

2. The Regular EXI 450 for $99 bucks is 100% Trex compatible and is what i have... this is what you should get... but trust me once you get it you woutn want to bother with using parts off of it to put on the Belt but rather take your electronics out of the belt and put on the EXI.

Hope that sums it up... So again please dont make the mistake and buy the EXI TG Special edition, thats brand new and no one knows where to get parts for it just yet so before you sink money into that and not being able to repair it i say go with the Regular EXI 450 for 99 as parts are abundant and its a great heli...

I posted a video of mine a couple times on here of it hovering.

[DierWolf]

traeside (http://www.helifreak.com/member.php?u=51469)

I didnt receive my Esmart as yet... its on its way though.. and i am sure i will love it..

[traeside]

Okay I can’t wait for the review on the E-Smart not a lot out there. My Calipers were not small enough to measure the ID of the races but if I slip them on the feathering shaft you can clearly see that 2 of them rock side to side much more then the other 2. now the question remains. Inside? out side? Does not make a hill of beans of a deference. LOL

[merlin703]

Merlin, First of all..

1. Dont buy the Exi TG 450 Special addition, i have spoken personally to Xheli and they say they will not be carrying the parts for it.. and as its not a Trex clone parts may be hard to come buy.

2. The Regular EXI 450 for $99 bucks is 100% Trex compatible and is what i have... this is what you should get... but trust me once you get it you woutn want to bother with using parts off of it to put on the Belt but rather take your electronics out of the belt and put on the EXI.

Hope that sums it up... So again please dont make the mistake and buy the EXI TG Special edition, thats brand new and no one knows where to get parts for it just yet so before you sink money into that and not being able to repair it i say go with the Regular EXI 450 for 99 as parts are abundant and its a great heli...

I posted a video of mine a couple times on here of it hovering.
Got it, thanks!

[traeside]

Okay question on the tail upgrade mentioned on page one. How many people have tried the Microheli Precision Tail Pro SE V3 it seems to be the cheapest answer if I want an all in one replacement that includes the whole deal. I see some people are breaking the grips. Anyone here have that issue?

[another_finn]

I see some people are breaking the grips. Anyone here have that issue?
Not me, and I've managed to make a couple of pretty impressive gravel sprays that completely obliterated the tail blades. I've seen the side plates criticized for being a little thin and fragile, but I don't really see how deep you would have to dig the tail for that to be a major issue. Guess I'm just not falling from high enough yet.

[merlin703]

Hey guys, I thought I saw on one of the threads someone... can't remember who giving some names of upgrades when it comes to electronics (servos, gyros (best option vs an OK option) saying that certain servo is better than the ESKY and even cheaper. I thought it was here since this is the thread with upgrades but I don't see it. Does anyone know what I'm taking about? I would like to get the electronics ready for my Belt-CP, thanks guys!

[another_finn]

...saying that certain servo is better than the ESKY and even cheaper.
I think it might have been me, but I can't remember the thread either...

However, the description is unmistakable. Whoever it was, they were talking about the Towerpro SG90. There's also an SG91 out now, and I've heard some very favorable opinions. Never tried them myself, though.

For the ultimate budget option, the HXT900 is essentially a rebranded SG90 at $3.65 a pop :)

[merlin703]

I think it might have been me, but I can't remember the thread either...

However, the description is unmistakable. Whoever it was, they were talking about the Towerpro SG90. There's also an SG91 out now, and I've heard some very favorable opinions. Never tried them myself, though.

For the ultimate budget option, the HXT900 is essentially a rebranded SG90 at $3.65 a pop :)
You are not kidding. This is what I found... the towerpro seem to be faster

1) Towerpro SG90 for $9.95
SG90 weight- 9gDimension23x12.2x29mmStall torque1.5kg/cmOperating speed0.3sec/60degree(4.8v)Operating voltage4.2-6VTemperature range0¡æ_ 55¡æDead band width10us
http://www.hooobby.com/towerpro-sg90-mini-servo.html

2) HXT900 for $3.65
Size : 21x12x22 mm / 0.74x0.42x0.78 in
Voltage : 3v ~ 6v
Weight: 9g / 0.32oz
Speed : 0.12 sec/60(4.8V)
Torque : 1.6 kg-cm
Working Temp : -30C~60C
Teflon Bushing, 15cm wire, coreless motor
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=662

[another_finn]

Every site seems to have their own specification - but all are usually quoted as .12 sec/60 deg at 4.8 V. There are some differences between the Esky and SG90 dimensions - the mounting tabs are certainly different, and you may have to file them down a little on the SG90s to fit the Belt CP. I didn't, but I might as well have to make it easier on myself. The SG90 and HXT900 are identical in all dimensions.

Both the SG90s and HXTs feel noticeably faster and more precise than Eskys. The SG90s seem to handle wear and crash damage much better than Eskys, but the jury is still out on the HXT. I just haven't been abusing them enough to tell the difference yet.

...oh, and you can get a 4-pack of SG90s at $25 or just a hair above from several places. No need to shell out almost $40 for a total servo replacement.

[merlin703]

Thanks man! :)

[Twmaster]

Those SG-90 servos are indeed a great bargain for their price I've been using them on planks for years.

Finn... Thanks for the info on the HXT900 servo being the same.

[BigMc70]

Hey guys its good to know I am not the only person making a Belt Cp look like a Rex. It all started because all the Cp parts were out of stock.

[helihathnofury]

It's what most of us do; replacing the stock pEsky parts with better upgrade bits, mostly from Align. So much so that I don't know whether I have a "Beltrex", or a "TCP", but the latter reminds me of some form of medicine hated as a kid!!!! BTW, I use the sg91r servos - very good, quick and accurate, although I don't know the difference over a sg90!

Cheers

Mike

[Ian 777]

Iv'e been using Hxt's they are a bargin at a little over £6 for 2 in the Uk. 0.12 ms and much stronger than esky also resin gears so they should be strong enough. I havn't busted any
yet