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HomeAircraftHelicopterAlignOther › Trex 700 Main gears stripping are commonplace..Please sort this out Align
04-01-2009 08:42 PM  9 years agoPost 21
payne1967

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uk

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danish helifly
its your 3rd bearing mod i copied but i used the sceadu 50 3rd mainshaft bearing block and changed the bearing to one with an 8mm id
i then used a short length of an old shuttle mainshaft with the bolt hole redrilled to 4mm so the 700 bolt would fit through
my 3rd bearing block is bolted into the frames

thanks for the idea

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04-01-2009 08:51 PM  9 years agoPost 22
Wimbledon99

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UK

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i used the sceadu 50 3rd mainshaft bearing block and changed the bearing to one with an 8mm id
i then used a short length of an old shuttle mainshaft with the bolt hole redrilled to 4mm so the 700 bolt would fit through
my 3rd bearing block is bolted into the frames
Should you really have to do all this to get a £500 kit airworthy and flying correctly

Me thinks not

I don't fly 'Align' as I don't like them but you guys who do should start a petition on RunRyder to get the quality sorted.

3D?? No - just another input error!!!

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04-01-2009 09:03 PM  9 years agoPost 23
Danish heliflyrrNovice - Denmark - My Posts: All  Forum  Topic

Hi..
Im glad im not the only one with this issue. Hope other Helifreaks can use this mod ide´.. I guess there is different kind of view how to make this mod, it´s great to hear how other are making there mod´s
Hope all can benefit from this modification..

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04-01-2009 09:12 PM  9 years agoPost 24
Danish helifly

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Denmark

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[/quote]Should you really have to do all this to get a £500 kit airworthy and flying correctly

Me thinks not

I don't fly 'Align' as I don't like them but you guys who do should start a petition on RunRyder to get the quality sorted.

3D?? No - just another input error!!![/quote]

Please name just one brand that have no issues what so ever...!
You can´t...:-)

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04-01-2009 09:32 PM  9 years agoPost 25
payne1967

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uk

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the bottom line is we should not have to sort this problem out ourselves
align should be sorting it with a free upgrade kit/fix
just like thunder tiger with the raptor 60 v1 (the tail gears etc)
and hirobo did with the sceadu 50 mk1 kit (by supplying a 3rd mainshaft bearing and block to sort the vibration problem out)
in the uk this was supplied with the kit free (unless the dealer ripped you off and sold it to you, i know one that did this)

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04-01-2009 09:33 PM  9 years agoPost 26
Barney

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Inverness Scotland

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Hi Danish Helify yes it may well have been you. I picked up on Mr Mel's thread originally about the mod on the Freak.

The pics I saw didn't have the 3rd bearing block secured to the frames though

Here in the UK Several of us where concerned the design lacked a 3rd Mainshaft bearing at the outset even before it was launched.

Two bearings would possibly have worked if the lower one was below the main gear.

I've still do loose a gear myself although friends have lost a few now.

One thing when I did when I built mine was to shim the mainshaft extremely tightly..(Way to tight TBH, but I didn't have a thinner shim to hand) I figured the Align brgs would 'Bed' in after a few flights anyway.

So how are you getting on with your Machine. Is the gear holding up now?

Credit I think goes to Payne1967 above for coming up with a suitable block for the mod.

SPARTANRC Team pilot

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04-01-2009 09:37 PM  9 years agoPost 27
payne1967

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uk

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barney
how did you get the shims to fit?
my mainshaft bearing upper to lower are out of line and it has no movement in the shaft when fitted

i have to leave the bearing holders very slack and then fit the shaft and gears and then bolt the bearing holders into the frames

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04-01-2009 09:49 PM  9 years agoPost 28
Danish helifly

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Denmark

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Hi Barney and others..

My gear hold´s perfect now. There is no wear what so ever. Have burned over 8gal with no signs of wear on maingear.. Also i still haven´t bolted the 3rd bearingholder to the frame. I dont whant to undergo any further details why some think this is wrong or not..:-))
All i can say it works as i´t should..

Cheers..

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04-01-2009 09:50 PM  9 years agoPost 29
Wimbledon99

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UK

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Please name just one brand that have no issues what so ever...!
You can´t...:-)
You are missing the point - It should be ALIGN coming up with a solution on THIER heli - not the person paying out for the kit.

If you bought a new car that had a fault which meant you could potentailly crash it - would you start bolting bits to it in order to fix it?

NO, you'd take it back to the dealer!!

3D?? No - just another input error!!!

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04-01-2009 09:56 PM  9 years agoPost 30
Barney

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Inverness Scotland

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Mines built as standard as per kit at mo i.e no mods at all.

I'm talking about the mainshaft bearing shim. The one I used was too thick, the others to thin. I virtually forced the assembly together with the thicker shim which made the mainshaft bearing feel Notchy.

It bedded in Ok after a couple flights.

SPARTANRC Team pilot

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04-01-2009 10:10 PM  9 years agoPost 31
Danish helifly

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Denmark

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Wimbledon99..
You have a very god point. But i dont whant to wait for ever before Align will do something about i´t.. If Align whant´s there customers to modify there models so thay are strong enough for 3D flight, and Align whant´s this reputation - Fine with me, but thay meight loose some customers i longterm until thay fix this issue..

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04-01-2009 10:40 PM  9 years agoPost 32
Barney

rrKey Veteran

Inverness Scotland

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Thing is Wimbledon99..

Every Heli I've ever had has had issues somewhere. I just want to fly not argue with an importer over a £5 part.

The 700 is an excellent Heli. Its capable, mostly reliable..but for me its advantage is its affordability.

Credit where credits due Align have addressed all the issues when they are aware of them. Just they cant seem to get the 700 maingear sorted. They have issued the bigger gear so they are not standing still..

Maybe its the Distributors at fault for not giving enough feedback or someone involved in the design is in denial.

The reason I started this thread is to make doubly sure they realise the -1 gear is not the fix they were hoping for.

Everybody rips into Align for quality, but in reality I've never had reliability as good as the 600Ns. I accept they are not Vibe quality, but who cares they fly extremely well. Well over 2000 flights on mine.

One Clutch 4 gallons in(clutch liner gap was to big)..removed the originial liner and packed with a layer of paper for correct clearance. Still using that 2nd clutch now. A few sets dampners (I now shim them as well use the tube)

Snapped 4 flybars in flight all 440mm ones (It uses a closed flybar cage so doesn't crash) but SUS is the wrong material....I usually change the Mainshaft brgs after a crash + used 2 pinion brgs. Popped 4/5 boom stays. Couple of blade grip brg sets. Few links and balls.
I now adjust the mesh of my front tail gears and run the tail blades a little loose, not taken a gear out since except in a crash.

To me at least they are proven.

I expect the 700 will follow suit..

SPARTANRC Team pilot

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04-01-2009 10:49 PM  9 years agoPost 33
johnsalary

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MI

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The 700 is mix off total perfections and few dropped balls. One of them is main gear on few spots:
1) Modyle 0,7 is hudge error for 90 sized heli
2) Injected gear only 10 mm! thick is another eror
3) No supported shaft by 3rd bearing on bottom - what we talking about
4) Plastic bearing house for pinion bearings..
All above need to be changed completely by Align.

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04-02-2009 12:35 AM  9 years agoPost 34
johnsalary

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MI

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Is this way like you have done?

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04-02-2009 12:58 AM  9 years agoPost 35
payne1967

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uk

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my bearing block is off the sceadu
you can either pay hirobo's price or get a quick uk one (no need to make a one off)
my shaft extention (same idea)is 8mm dia

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04-02-2009 02:41 AM  9 years agoPost 36
johnsalary

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MI

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I measured it but the 8 mm is impossible to insert in the main shaft There is 7.9 mm ID Did you drilled the main shaft to 8 mm ID?? Does Hirobo sceadu bearing house have width 61 mm or you used some spacers there?

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04-02-2009 03:20 AM  9 years agoPost 37
devious17

rrApprentice

Malaysia

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This is interesting, gear striping seems to be occuring in cold countries. In Asia, at least in my country, we have yet to observe a 700 striping gears while banging the 700 with hard 3D.

I do believe Align needs to take a look at the material that was used in their gears to address this issue.

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04-02-2009 03:44 AM  9 years agoPost 38
johnsalary

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MI

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There is a lot problems around and opinions as well. Some says third block missing, some module 0,7 is not enough, others the plastic pinion bearing house id not strong enough. IS Danish helifly aiming to the black point?

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04-02-2009 09:27 AM  9 years agoPost 39
Fixit

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UK

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I measured it but the 8 mm is impossible to insert in the main shaft There is 7.9 mm ID Did you drilled the main shaft to 8 mm ID?? Does Hirobo sceadu bearing house have width 61 mm or you used some spacers there?
I used a 600 feathering spindle for the shaft extension cut down and then drilled, the spindle shaft is 7.92mm and it fits in the 700 main shafts perfectly.

I personally think the bearing block should have had eight anchor points instead of four, more like the Raptor 90.

I only like to fly gassed up

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04-02-2009 10:19 AM  9 years agoPost 40
J2M

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UK

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Anyone know when, if ever, shops in the UK will get the -1 main gear? Anyone know why we haven't got it when it's available in other countries?

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