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Other › Tail Shaft Play
02-12-2006 01:59 AM  12 years agoPost 1
lavarocks

rrApprentice

Rochester, NY

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I just installed a metal tail (case, slider, grips) and my metal drive pulley/shaft has a ton of play inside of the case. Is this common and is there a common simple fix?

- chuckyteets

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02-12-2006 02:14 AM  12 years agoPost 2
lbowen

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York S. Carolina-USA

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Is the play lateral/sideways or a wobble in the bearings? - no that is not normal - I have no play but did have bearings that were to large for the shaft diameter - I replaced them and have a very precise smooth tail assembly.

lbowen

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02-12-2006 02:17 AM  12 years agoPost 3
Vegar

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Norway

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Mine also had some play, see:
http://www.runryder.com/t231745p1/
This is the standard Align tailcase from a stock SE.

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02-12-2006 02:21 AM  12 years agoPost 4
lbowen

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York S. Carolina-USA

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I have the MH tail case which one do you have?

lbowen

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02-12-2006 02:28 AM  12 years agoPost 5
Trevor G

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Brisbane, Australia

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My SE had endfloat in the shaft. The tail pulley appeared too narrow to fill the space between the bearings. I pushed the shaft the way it would normally go under load and put a drop C/A on it to glue it into the bearing opposite the tailrotor. No Problems since.

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02-12-2006 02:33 AM  12 years agoPost 6
lbowen

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York S. Carolina-USA

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GOOD POINT Trevor G - the shaft is better to turn the bearing center than to ride in it which causes vibration and lateral movement if there is space.

lbowen

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02-12-2006 03:02 AM  12 years agoPost 7
Trevor G

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Brisbane, Australia

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any ideas why my SE is acting as though it is powered by a nicad going flat? It hovers for 30 seconds max and then power fades away. The problem arose suddenly after I hadn`t used it for 3 days.

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02-12-2006 06:08 AM  12 years agoPost 8
Trevor G

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Brisbane, Australia

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what do you recon willy??? - for crying out loud.

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02-12-2006 10:31 AM  12 years agoPost 9
Trevor G

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Brisbane, Australia

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I tested the batteries and they are all good, Brand new 2200 3 cell lipos, two of them. Everything was fine and then I just went to fly and this happened. cell voltage is within .01 of a volt and they aren`t getting warm in use. ESC gets warm though. It`s 30 degrees celsius plus here though by day.
I changed the motor over and still the same result. i think I have a DUD align ESC.
Anyway Trex just got the arse! I`m putting my reciever back into my gasser and selling the align. I`ve spent enough on align products.
Anyone want an SE Trex? Got all the fruity metal bits!
Oh and willy, no I didn`t glue up the tailrotor shaft with the CA adhesive. I work on helis for a living and have been flying models for years, this was a legitimate question because I`ve never owned such an annoying model. I think it comes down to the align ESC as it won`t run a 13 tooth pinion with woodies on without cooking itself and shutting down. I had to use an 11. should see how hot it gets with carbon blades on! Nothing but trouble with my ESC since day 1, but i just can`t seem to get it to catch fire.
I`m not about to spent 160 Aussie dollars on a new one. spent enough already.

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02-12-2006 10:59 AM  12 years agoPost 10
lavarocks

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Rochester, NY

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Wow this got hijacked..

The play is side to side, the shaft is a perfect fit in the bearings. Align grey metal tail case/slider/grips

TrevorG, I may do what you did. Sounds cool.

- chuckyteets

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02-12-2006 12:15 PM  12 years agoPost 11
Trevor G

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Brisbane, Australia

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Mine has the anodised blue tail case. Problem is fixed. Only play left in the tail was in the plastic pitch arm where the pitch slider fits into it. I also CA`d the hole in it and the slot. After the CA dried I fitted the two parts together and worked them in my hand until it moved freely. Then just reassembled with oil.
CA can be used to build up a layer over a worn plastic part if you devise how to `fit` the parts at the end. Zero slop at the end of the day is the key.
Now back to my gasser! Damn these electrics.

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02-12-2006 06:44 PM  12 years agoPost 12
lavarocks

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Rochester, NY

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It's no problem getting the shaft out if you need to though, right?

- chuckyteets

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02-12-2006 08:36 PM  12 years agoPost 13
Trevor G

rrApprentice

Brisbane, Australia

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The shaft will just pop right out with correct support and small tap with a punch.
Hey Willy, thanks for the reply. I have a swallow charger. It peaks at 12.599 volts for a 11.1volt pack. each cell is within .01volts when checked. after the short hover when it dies right down on me the voltage reads 11.7 or so. I don`t know why a 160 dollar charger designed for these packs peaks this high though. The problem appeared with the chopper and it does the same thing on both packs which I find strange. The gear I am using is a swallow peak detection charger/discharger, 2 model engines awesome power 11.1volt 2200mah packs (about 10 charges on each), align 35 amp ESC, and the align 420 motor (3200KV).
Never thought electric would be more finnicky than glow mate...thats why I got it! hahaha
Apologies for before Willy, thought you were just being smart and more to the point, totally unconstructive
Cheers for the assistance.
P.S. I swapped the motor and still have the problem so its not that.( I don`t think) I don`t have a spare ESC or a third lipo to try.

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02-12-2006 10:09 PM  12 years agoPost 14
zrdcorp

rrApprentice

Caguas, PR

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lavarock,

Sand the silver spacers a little bit. Then tight the screws gthe best you can without stripping them.

Roger's Law: If it is worth doing it, it is worth exceeding it.

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02-12-2006 10:49 PM  12 years agoPost 15
lavarocks

rrApprentice

Rochester, NY

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All the spacers?

There is more than a little sandings worth of play... Tightening cannot take up this much, either.

I'll just glue it.

- chuckyteets

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02-13-2006 06:02 AM  12 years agoPost 16
Trevor G

rrApprentice

Brisbane, Australia

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11.1 volt, 2200mah, 15C, 3 cells. The charger `appears to be charging them, they `appear` charged in the voltage sense.
Do lipo`s have a sudden short capacity when they are tired? will cycling them through a discharge then charge cycle help?

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02-13-2006 06:31 AM  12 years agoPost 17
Trevor G

rrApprentice

Brisbane, Australia

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cheers for the help regardless willy, I have one pack on discharge now to check the capacity of it. I can only draw .5amp off it though through the charger. The packs were 86 dollars each through H store here in Aus. I bought `em mail order.
We really need a set of test graphs made at the lab on these lipos so we all know what they do under different conditions, AND how they look under load on the graph when they are stuffed.
Got a spare $1000 Hahahaha
I bought my se for some backyard fun and it isn`t turning out to be so economical mate, those packs, even if they were cheap ones, cost over 170 and I got about 15 or 20 flights total. `Bout the same as my SAB blades on the 50 but hey I don`t smash them.
( I don`t try to do big stunts I can`t pull off) hahahahaha

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02-13-2006 06:36 AM  12 years agoPost 18
Trevor G

rrApprentice

Brisbane, Australia

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Thanks mate! much appreciated.
I`m still looking at my home made carbon 50 on the shelf though!

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02-13-2006 05:18 PM  12 years agoPost 19
zrdcorp

rrApprentice

Caguas, PR

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lavarock,

Sand as much as you need but don't overdo it.

You may glue them in place, but run the risk of them ungluing during flight.

PLease let me know of your results.

Roger's Law: If it is worth doing it, it is worth exceeding it.

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