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Knightrous
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Joined: 15 Jun 2004
Posts: 8511
Location: NSW

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Jake's robot NC ran 85A's with old style dewalts, but the motors exploded before we could really say much Razz
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Post Tue Jul 15, 2014 8:06 am 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8511
Location: NSW

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quote:
Originally posted by Knightrous:
Some new parts to test.



Now have a pair of 3S - 12S 2600W 1100KV 4 Pole Sensored Brushless Inrunner motors on the way from a supplier, which should be a direct bolt on to these 42mm gearboxes. Lets see if we can get something brushless working super reliable!
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Post Wed Jul 30, 2014 2:55 pm 
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Nick
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What ratios can you get for the 42mm gearboxes?
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Post Wed Jul 30, 2014 3:25 pm 
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Knightrous
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Location: NSW

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We have the following ratios available from the supplier.
3.7:1
5.2:1
14:1
19:1
27:1
51:1
71:1
100:1
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Post Wed Jul 30, 2014 3:40 pm 
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Knightrous
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Testing out some 2100kv inrunners with BotBitz 20:1 gearboxes


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Post Sat Aug 02, 2014 11:23 pm 
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Knightrous
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Works out to be a compact setup.




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Post Sun Aug 03, 2014 5:27 pm 
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maddox



Joined: 21 Dec 2006
Posts: 786
Location: Belgium

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NICE... Potential replacement of the MSR drives with speed 900's...

Weight?
Post Sun Aug 03, 2014 8:15 pm 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8511
Location: NSW

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quote:
Originally posted by maddox:
Weight?

692g
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Post Mon Aug 04, 2014 9:00 am 
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maddox



Joined: 21 Dec 2006
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Location: Belgium

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A speed 900 is 660 grams...
Post Mon Aug 04, 2014 9:43 am 
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miles&Jules
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Joined: 19 May 2010
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Location: ipswich QLD

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cool…how much? Very Happy Very Happy Very Happy
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Post Mon Aug 04, 2014 9:54 am 
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Nick
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Location: Sydney, NSW

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692g is with the gearbox, the motors only weigh around 317 grams.
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Post Mon Aug 04, 2014 10:04 am 
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maddox



Joined: 21 Dec 2006
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Location: Belgium

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I did understand that.
A standard MSR 12-72 with 7075T6 ali gear in a custom HDP wheel is easely 1400 grams.
Post Mon Aug 04, 2014 10:16 am 
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Knightrous
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Joined: 15 Jun 2004
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Location: NSW

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quote:
Originally posted by miles&Jules:
cool…how much? Very Happy Very Happy Very Happy


Motor is $60 (http://hobbyking.com/hobbyking/store/__24519__Turnigy_TrackStar_1_8th_Sensored_Brushless_Motor_2100KV.html)

Gearbox will probably end up selling for $40. Just need to put them through combat and ensure it's combat worthy. Might put this package together as basic robot for nationals for someone to drive.
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Post Mon Aug 04, 2014 10:52 am 
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Knightrous
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Location: NSW

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Found a supplier for RS775 motors that looks promising. Going to order some samples to make sure they are the real deal and then will follow up with a bulk order to us them with our gearboxes for those who want to avoid brushless.

Motor Specs - RS-775

Nominal Voltage:12 (advertised as a 12-24v motor, I would probably say 18v tops)
No Load RPM: 18800
No Loam Amps: 2
Stall Amps: 75.37
Stall Torque: 4800g.cm
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Post Fri Aug 08, 2014 11:53 am 
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miles&Jules
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yum ..i like the 775 Very Happy
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Post Fri Aug 08, 2014 1:21 pm 
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