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Old Oct 08, 2014, 07:47 PM
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Slipso 400 Power Setup - Help!

Call me a bad sport, but a few of the guys at the local club got their hands on HobbyKing's EFX Racers. Now they seem to be obsessed with speed. So, I've decided to build a Slipso 400 from a kit and show them how it's done.
http://www.pldaniels.com/flying/models/slipso400/
Only problem is I don't know what motor to put in it.

I was hoping to be able to fly off of my 3s 1000mAh 30C packs for this and get around 5 minuted of high speed flight (fast enough to leave the EFX in the dust). Does this seem reasonable?

I started to look at these motors:
http://www.hobbyking.com/hobbyking/s...arehouse_.html
https://www.hobbyking.com/hobbyking/...dproduct=23615

As you can see I'm trying to keep the cost below 20 or 15 dollars.
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Old Oct 13, 2014, 04:52 PM
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So I found some more options, but I don't know which would give the best speed.
Here's the current list:

http://www.hobbypartz.com/86ma61-2210-3000kv.html
http://www.hobbyking.com/hobbyking/s...208_2150_.html
http://www.hobbyking.com/hobbyking/s...idProduct=8143
https://www.hobbyking.com/hobbyking/...dproduct=42436
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Old Oct 14, 2014, 04:25 AM
2012 NZ Speedcup - 231 MPH
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New Zealand, Tasman, Richmond
Joined Mar 2006
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https://www.hobbyking.com/hobbyking/...r_2800kv_.html

is another option. The Slipso was my first real high performance plane, they are great! You should whoop some a$$ with a decent setup. I'd be looking at a 4.5x4.1 prop on 3 cells with that motor. Expect 100 to 110 mph.
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Old Oct 14, 2014, 06:21 AM
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I did see that motor during my search but I was concerned with the weight. I'm trying to keep the AUW low especially with a 1000 3cell. Do you think that will be an issue?

I guess compared to the old brushed cans and nicads, 250g for a motor and lipo isn't terrible.
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Last edited by jsut210; Oct 14, 2014 at 06:40 AM.
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Old Oct 14, 2014, 03:38 PM
2012 NZ Speedcup - 231 MPH
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New Zealand, Tasman, Richmond
Joined Mar 2006
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Lighter is better for the Slipso, but AUW of 400-550g is perfectly fine.
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Old Oct 14, 2014, 06:11 PM
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I also found this motor in several classifieds, http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLWW9

Would it get me to 100+ mph with a 4 inch prop?

EDIT: never mind, It seems I read the specs too quickly
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Old Oct 14, 2014, 06:20 PM
2012 NZ Speedcup - 231 MPH
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New Zealand, Tasman, Richmond
Joined Mar 2006
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Yep too small IMO

This would be better

http://www3.towerhobbies.com/cgi-bin...&I=LXLWX8&P=ML

But on a 4.1x4.1 though ...
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Old Oct 14, 2014, 06:27 PM
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Okay, ill probably go with the first motor you suggested. I'll experiment with 4.5x4.5, 4.5x4.1, and 4.1x4.1. I'm hoping a 30A esc will cut it.
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Old Oct 15, 2014, 05:21 PM
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I found a motor with these specs in a classified. Think it will work?

Aon 2815 3500kv

* Resistance: 38.1mQ
* KV: 3,500 * No Load lo: 2A
* Max Current: 40A * Avg. Current: 16A-24A * Dia: 28mm (l.lin)
* Length: 35mm (1.389in) * Weight: 98g (3.46oz) * Shaft Dia: 3.2mm (1/8")
* Max Watt: 250W * Motor Constant: N.A. * Magnet: Neodymium
Direct Drive: Speed 400/480 Ducted fan units or Props: 5 inches (120 mm) or smaller
Gear Ratio: 3.2:1 ratio or larger + 11.1V+ 11x7 => 2.0 Ib of thrust. (TREXuse 11T)
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Old Oct 15, 2014, 05:42 PM
2012 NZ Speedcup - 231 MPH
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New Zealand, Tasman, Richmond
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Indeed!
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Old Oct 16, 2014, 08:14 AM
Fly it like you STOL it!
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United States, FL, Daytona Beach
Joined Jan 2011
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I decided on this motor for mine:
http://www.headsuphobby.com/Firepowe...00kv-C-424.htm
I figure it's a 400 can size and should push out PLENTY of power.
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Old Oct 16, 2014, 12:03 PM
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Also, if I'm shooting for around 120mph what should I do in terms of strengthening the wing? Would 3/4oz glass on both sides of the wing be enough?
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