racenut

iTrader: (15)

WOW!! 1.5 hour???

Hawk6

iTrader: (52)

So, now that I've read all these tricks, should I build a slave motor "dyno" - hook test motor to a slave motor and measure volts and/or amps off the slave - or should I just drop $100 for a real dyno????

Or, buy $100 worth of silver cans and keep the good ones?

Opinions?

Recommendations on a real dyno?

Thanks.

rtypec

iTrader: (2)

Wow...this silver can stuff sound like a lot of vodoo. If I were to run silver can, I would do the following: If it's a big race, I'd run with high-quaility bearings with all of the oil and grease blown out (maybe add a microscopic drop of oil), make the car as light as possible, find a setup with high corner speed, and charge at 10 amps .

Customworksking

iTrader: (74)

the best I been getting is max power 36 to 37 920 tq 33watts 16 to 18,000 rpm on a Fantom dyno

wyl03

iTrader: (44)

$100 will only get u a motor checker (eg. TMM motor master, yokomo MMS, integy v2 dyno, etc ..).
those are not dyno as they measure the motor RPM without load.
the "motor checkers" are useful for comparing your different motors but nothing more beyond that.

- it will tell u motor A peaks at 25000 rpm and motor B at 29000rpm (and at what voltage that happens)
- but it doesn't tell u the length of time it takes to hit the peak (just exaggerating - motor A takes 2sec to hit 25000rpm under load, but motor B takes 8sec to hit 29000rpm under load)
- so u get a 1-dimension view only

if u want a real dyno then google on robitronics dyno, CE TD45, fantom dyno. they'll cost in excess of US$500 though

PeteB

iTrader: (-1)

I ve tried to build a slave motor dyno, with mixed results. The best thing I have come up with so far (with the exception of dropping some serious cash) is to get a large-ish plane propeller (which will provide the load) and see how much wind it generates - sounds very basic, but it cost me nothing, and you can "feel" the strength of the motors. I have borrowed rpm testers etc and while they are ok, they only test at no load, so there is no way of measuring torque...

my suggestion is to get as many motors you need to so you can use one motor per race, then swap it for a clean one for the next race. keep them SUPER clean, with a shinny com, it will go dull after a race and needs to be re-cleaned.

Pete

rccardr

iTrader: (8)

Tekin dyno. Haven't been made in years but you can still find them here and on eBay. I'm not selling one, but here's a current posting:

http://cgi.ebay.com/Tekin-Motor-Dyno...QQcmdZViewItem

These are the best Mabuchi motor testers ever made and the only one I use on my own bench.

Hawk6

iTrader: (52)

Thanks for the info on the Tekin dyno. Can you tell me why the Tekin is better, just so I know why I'm buying it (if I buy it)?

Thanks again.

bizkit1

iTrader: (27)

That's a fellow members dyno on the forum listed here: http://www.rctech.net/forum/showthread.php?t=134800

Hey Doc, hi from Alabama

Fuzz

wyl03

iTrader: (44)

Wow .. that’s really an old school dyno!!
But being a tekin product .. I’m sure it works.

rccardr

iTrader: (8)

Hawk- It's very stable and produces repeatable results, which is very important to me. The slave motor lasts forever (I use a mod can with a stock arm in it and hard brushes) and once set at at five volts and 15 amps of load you get real-life numbers that mean something in TCS racing (e.g. not too much load and not too little). You can also put a switch in between either of the slave motor leads and get a lighter load reading. It really works. Next time you go up to Trackside, ask around- there are bound to be a few of them in the pits. Or try to hook up with RC GaryK, who's somewhere in IL and might be able to help you out.

Hawk6

iTrader: (52)

Thanks a bunch for the info.

Victor Vector

iTrader: (9)

Tekin Dyno up for grabs here. Got on sitting on the shelf for the past 3 years gathering dust. $60 posted in USA.


PM me

Victor Vector

Vance

Howzit guys,

Has anyone tested the Robitronic dyno? Any good & value for money?

Cheers,
Vance.

AEDave

I built a very effective motor dyno for pennies, I also did a full article on it, will post tonight.......use you motor to drive another motor used as a slave measure the volts produced with a dvm, the faster its driven the higher the volts, dead simple and accurate, works on all motors of course not just silver cans.

The only secret I have found with the silver cans is the cleaner the comm the faster they go, WD40 and cotton buds used between each run helps, I also water dip......

have a look here:

http://uk.geocities.com/dave_pickett...ew_page_17.htm