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Angler-Hi
06-02-2008, 10:15 PM
I have a Cobweb II that I'm putting together for my wife. I bought it from a fellow watthead, but it came with a brushless inrunner with gearbox. The instructions show a MP Jet brushless outrunner from Hobby Lobby. I just can't see paying $90.00 for a motor, for a plane of that size!! The brushless inrunner is a nice motor and seems quite powerful for it's size. I have no idea what kind of motor it is though. This is the smallest MP Jet motor I could find, and I would assume this is the one that was meant to power the Cobweb II.

http://www.hobby-lobby.com/brushless-mpjet.htm

If anyone has an idea on a good alternative outrunner for this plane, I would be so grateful...even some ideas on how to install the inrunner. Thanks.

SkunkyMagoo
06-02-2008, 10:18 PM
If it already has a motor and gearbox, why change it? What was the model outrunner it called for? You could find an alternative easily by matching specs. Check out the Suppo outrunners from lightflightrc.com

Angler-Hi
06-02-2008, 11:09 PM
If it already has a motor and gearbox, why change it? What was the model outrunner it called for? You could find an alternative easily by matching specs. Check out the Suppo outrunners from lightflightrc.com

I want to change it because I don't know how to mount an inrunner to this plane. It wasn't designed to house an inrunner. The motor mount that comes with the kit is for an outrunner. Hobby Lobby no longer carries this plane, it's been discontinued, so I have no idea what the actual recommended MP Jet motor is.

SkunkyMagoo
06-02-2008, 11:14 PM
Oh ok, I thought it was already assembled.

Is this it?

http://www.rcgroups.com/forums/showthread.php?t=508599

If so, check these out.

http://lightflightrc.com/HTML/products/SP_CHEAP_COMBO_B2208-17%2B18A.htm
http://lightflightrc.com/HTML/products/SP_2204-19.htm

Angler-Hi
06-02-2008, 11:34 PM
Thanks friend! Based on the thread on the other site, this is the recommended motor. I'll match up the specs (KV, weight, Etc.)
<TABLE cellSpacing=4 cellPadding=4 width=700 align=center border=0><TBODY><TR><TD vAlign=top align=middle colSpan=2>Small light outrunners - great for 3D models to 11 oz.</TD></TR><TR><TD align=middle>http://www.hobby-lobby.com/images/mj20204.jpg</TD><TD><FORM action=/cgi-bin/basket.pl/hobbylobby?basket.html method=post>MJ20204 AC 22/7-60D Outrunner Brushless
Motor ..... $ 89.00
<INPUT size=2 value=1 name=c_MJ20204> <INPUT type=submit value="Add MJ20204 to Cart"> ESTIMATED ARRIVAL 06/13/08 - Please Preorder Now
</FORM>1-1/16" diameter, 1-3/16" long (from prop back plate to firewall mounting surface), 3mm prop shaft, .9 oz. Use with 3 lipoly cells, and APC props from 7x4 to 9x6. Maximum efficiency at 5 amps with peaks to 8 amps. To attach the motor to your speed control order MJ20221 (http://www.hobby-lobby.com/connectors.htm) motor wire set.

</TD></TR></TBODY></TABLE>

Dr Kiwi
06-03-2008, 12:30 AM
You have to love H-L.... they never give you the relevant specs for the motors they sell!

If you go to the manufacturer's site you CAN find out the vital details - but why can't H-L save you the trouble.

http://www.mpjet.com/frame_en.php

That 22/7 - 60D is a pretty wimpy motor if, at 29g, it is only good for 5A... 8A max. (50-80W)

Get a MicroDan 2205 Speed (33g) and you can put 300W-400W through it!

Dr Kiwi
06-03-2008, 12:48 AM
A $14.95, 19g, Suppo 2204/14 will out-perform your $90 29g MPJ!

Check out www.lightflightrc.com.

Angler-Hi
06-03-2008, 01:24 AM
Thanks Dr. Kiwi. I was looking at that. However, I don't think putting 300-400W into this plane would be a good idea...really not needing her to break the sound barrier:D, just help the wife get the basics of flying.

I really appreciate the link friend.

btsai
07-24-2008, 09:42 PM
Angler-Hi -- I think you looked at the wrong motor. The one Dr. Kiwi suggests is a 75 watt motor...

Angler-Hi
07-25-2008, 03:42 PM
Angler-Hi -- I think you looked at the wrong motor. The one Dr. Kiwi suggests is a 75 watt motor...

I know, I was responding to post #6.

GreenAce92
07-25-2008, 04:19 PM
Hobbycity? 20dollar motors...

btsai
07-25-2008, 04:52 PM
I know, I was responding to post #6.

Oops -- sorry about that.


Speaking of those MicroDan motors -- they look to be POWERFUL. Anyone here ever run one?

Angler-Hi
07-25-2008, 05:29 PM
No worries btsai. I've never heard of the MicroDans motors before, but I think I might like to try one and see.