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Old Jun 05, 2012, 02:01 AM
anlucas is offline
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Blue tac is a plastecine like grey sticky material marketed in Australia and some other counties.

Usually use it to stick posters and other light objects on walls etc....

From wikipedia...

Similar products from other manufacturers include "Tack-it" by Faber-Castell,"Buddies" (colored pink), "Pritt-Tack", "Poster Putty", "Tac 'N Stick", "Ticky Tack", "Sticky Tack" and "White Tack" by German company UHU.

In the US, a similar, competing product in an orange color is marketed under the brand "Elmer's Tack".
Last edited by anlucas; Jun 05, 2012 at 02:47 AM.
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Old Jun 05, 2012, 08:18 AM
DeeCee 57 is offline
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and blue (the one I found locally is yellow ) tac is used as a provisory weight whilst balancing EDFs to find the heavy side and the amount of weight needed to have the fan run smooth as silk.

Once this has been determined, it is usually replaced by a drop or two of resin or other glue, or by grinding material off the opposite side etc, etc.
Old Jun 05, 2012, 08:45 AM
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Blue Tac


Yep, Blue Tac is as described above by Andrew (Ex Aussie?) and DeeCee.

Very similar to Poster Putty I believe?

I actually use the putty (i.e. Blue Tac) for the final balance as well.

You just move it to the inside of whatever's being balanced (motor of edf), fine tune, then add a drop of CA to it once the balancing has been completed.

And I look forward to balancing your EDFs Rick!

Postage might be a though!!!

Cheers

Dave
Old Jun 05, 2012, 10:34 AM
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Thanks for the explanation of Blue Tac guys, I may have to try that.

At the moment, as recommended by some for balancing EDF's, I'm using small pieces of Duct Tape placed on the inside of the Fan hub. It's very easy & quick but I worry a little about the longevity of this method even though it seems to hold very well. Guess I could use a drop of CA to secure the D.T.

Thanks for the offer Dave, I was just being envious about your Cool New Toy!
....If only we weren't so far apart though!
Old Jun 05, 2012, 11:12 AM
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https://www.rcgroups.com/forums/show....php?t=1267814

This method works great. I'm using the Turnigy L2855-2100, stock CS-10 4mm adapter and spinner and mine is so quiet my RCSpeedo app can't get a doppler on it. Luckily the stock 4mm adapter I got was in good shape.

This is with 4s and 5s, haven't tried 6s as I don't have one.
Last edited by dpowellmeii; Jun 05, 2012 at 12:42 PM.
Old Jun 05, 2012, 12:09 PM
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Quote:
Originally Posted by dpowellmeii View Post
https://www.rcgroups.com/forums/show....php?t=1267814

This method works great. I'm using the Turnigy L2855-2100, stock CS-10 4mm adapter and spinner and mine is so quiet my RCSpeedo app can't get a doppler on it. Luckily the stock 4mm adapter I got was in good shape.
What's your cell count with the 2100kv motor?

I've tried the L2839 2200kv and it'll burn up on 6s, good solid thrust but I could see the windings turn color
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Old Jun 05, 2012, 12:13 PM
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Quote:
Originally Posted by erh7771 View Post
What's your cell count with the 2100kv motor?

I've tried the L2839 2200kv and it'll burn up on 6s, good solid thrust but I could see the windings turn color
BL32 2150kv motor take 7s and no sign of any heat issue. Of course with heat sink.
Old Jun 05, 2012, 12:21 PM
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BL32 2150kv motor take 7s and no sign of any heat issue. Of course with heat sink.
Yeap, motor has tons of overhead and I've seen them on 8s not properly cooled last 2 - 3 minutes into the flight but with proper cooling (good metal shroud and heat transfer paste and heat sink) I can see those things take the power on 8s too..

They are over 6 times the price of the L2855s 2100s and heavier...I'm currently flying the SM F14 with 11lbs of thrust on 6s and it seriously sounds like a turbine in the air...tons of wasted power into those unscaled intakes.

Trying to get battery size and power down and for 6s that 2100 seems really solid...was thinking of trying a couple of the 1800kv motors but I'm starting to get a pile of motors that can get "attention" if not hid properly
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Old Jun 05, 2012, 12:44 PM
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Quote:
Originally Posted by erh7771 View Post
What's your cell count with the 2100kv motor?

I've tried the L2839 2200kv and it'll burn up on 6s, good solid thrust but I could see the windings turn color
Sorry meant to post that, this is with 4s and 5s. I don't have a 6s pack yet.
Old Jun 05, 2012, 12:48 PM
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Sean Habu had over 150 flights by now with the BL32 motor run with 6s.
The motor cost $75 from LHS. It cost much higher than those motor you guys play with. But over 150 flights still flying strong it worthed. I bet the motor might last longer than the plane. Maybe not....he so good hard for him to dump thump.
Old Jun 05, 2012, 01:04 PM
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Sean Habu had over 150 flights by now with the BL32 motor run with 6s.
The motor cost $75 from LHS. It cost much higher than those motor you guys play with. But over 150 flights still flying strong it worthed. I bet the motor might last longer than the plane. Maybe not....he so good hard for him to dump thump.
You've got a point, I would consider it if it was a higher KV for some other aircraft.

You know of a 56+mm long can 2400kv - 2700kv motor?

Regards
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Old Jun 05, 2012, 01:38 PM
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Originally Posted by erh7771 View Post
You've got a point, I would consider it if it was a higher KV for some other aircraft.

You know of a 56+mm long can 2400kv - 2700kv motor?

Regards
I only play with NeuMotor and E-flite so far.

BTW, The machine are running the spinners for my TJ100 rotor. As soon this job is done.
Than he adjust the program to make it smaller to fit my CS rotor washer.
So another week will had aluminum spinner to match with my washer.
Last edited by Tamjets; Jun 06, 2012 at 12:18 AM.
Old Jun 06, 2012, 02:14 PM
Glacier Girl is offline
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Nice looking Tam! So you'll have the whole combo of washers/spinners/ and adapters?
Got a price figured out on a combo set for the CS 70's?


Kinda related, and yeah I know most of the time HK doesn't get a lot of good press.
But I'll have to give em a thumbs up on this one. Got my new NanoTech packs in.
Pair each of 2S3000's and 3S3000's so I can mix and match for 4/5/6S set ups.

Each pack wrapped in bubble wrap, dropped into a small box, and then that got bubble wrapped. Then all four boxes bubble wrapped together. Air bags supported all four sides, top and bottom inside a heavy duty cardboard box.
And a surprise. Sometimes you get a decal sheet with your orders, not this time.
Today with the packs was a pair of chrome "Turnigy" emblems.

And I guess the really important part, how dang small these packs are. The 2S packs are barely thicker then say one cell of my 4S2650 20C pack. Not bad at all, higher mAh, and 50C capable.
Old Jun 06, 2012, 02:23 PM
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Quote:
Originally Posted by Tamjets View Post
I only play with NeuMotor and E-flite so far.

BTW, The machine are running the spinners for my TJ100 rotor. As soon this job is done.
Than he adjust the program to make it smaller to fit my CS rotor washer.
So another week will had aluminum spinner to match with my washer.
Tam,

Looking forward to these.
Old Jun 06, 2012, 02:53 PM
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As for cost. This spinner take two set up to had it done precision.
Good thing the NASCAR pay for the time to make aluminum spinners for their order. So I use that time to save cost to these.
The spinner itself cost $14.95
The whole combo $34.95. That including shaft, washer and spinner.


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