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Old Jun 07, 2010, 03:08 AM
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Just use an emax 2812 motor 18 amp esc and 7x5 prop , that was more than enough to fly a 1500mah 3cell of 113g.
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Old Jun 07, 2010, 02:04 PM
Sparky "Electrics Rule"
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I wonder how it compares to a Lasertoy 2712-17 1700kv motor. Appears to me to be a little hotter. Great price though.


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Just use an emax 2812 motor 18 amp esc and 7x5 prop , that was more than enough to fly a 1500mah 3cell of 113g.
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Old Jun 07, 2010, 04:34 PM
Sparky "Electrics Rule"
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The manual for the Swift II shows tape top and bottom. I never used tape on my Swift I but the Swift II will be faster. Is it needed. I don't mind on the bottom but I don't like it on top. what's the point of the nice paint job.
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Old Jun 08, 2010, 02:35 AM
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Originally Posted by twister782 View Post
just for the record. I used blue locktite on my MS composite swift 2. I used it on the screws that hold the motor on the motor mount. It shattered the mount like glass. It just crumbled to the touch. Just my 2 cents
Might as well add this... Loctite thread-lockers are for metal to metal only. I also learned that the hard way.

Kev
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Old Jun 08, 2010, 02:42 AM
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clueless about the other motor Bob i can only say i use the 2812 on my swift II , toro 900 and 2 strykers its a decent enough cheap motor which is all i care about lol.
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Old Jun 08, 2010, 03:03 AM
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b94cast,

Assuming a Microdan is out of budget... the emax 2812 is actually 1660Kv. Here's Dr Kiwi's numbers for that motor:

http://www.rcgroups.com/forums/attac...mentid=2872873

So around ~23oz/17A max. I'm not exactly sure what a stock 1500Kv BW does on 3cell with an 8040hd, but that sounds over the top. Are you stuck with an 8" prop? If you can fit a 9" prop there are a lot more good options over the counter. If you can afford a Microdan 1490Kv, you'll have it in spades... there are also <$25 rewound blue wonders in the FS/W forums that can do well over 20oz on 3cell/8040hd under 12A, and that might be the ticket. A 40oz+ class motor with camera on a Swift will keep your thumbs busy unless it's fast enough.

Cheers,
Kev
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Old Jun 08, 2010, 04:15 PM
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Started building my Swift finally. How do you align the thrust line when using the tube style motor mount? Do you try and center it straight through the trailing edge or align one edge flush with the top or bottom of the airfoil?
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Old Jun 08, 2010, 04:16 PM
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Quote:
Originally Posted by Truglodite View Post
b94cast,

Assuming a Microdan is out of budget... the emax 2812 is actually 1660Kv. Here's Dr Kiwi's numbers for that motor:

http://www.rcgroups.com/forums/attac...mentid=2872873

So around ~23oz/17A max. I'm not exactly sure what a stock 1500Kv BW does on 3cell with an 8040hd, but that sounds over the top. Are you stuck with an 8" prop? If you can fit a 9" prop there are a lot more good options over the counter. If you can afford a Microdan 1490Kv, you'll have it in spades... there are also <$25 rewound blue wonders in the FS/W forums that can do well over 20oz on 3cell/8040hd under 12A, and that might be the ticket. A 40oz+ class motor with camera on a Swift will keep your thumbs busy unless it's fast enough.

Cheers,
Kev
thanks for all the info!
With how I have this setup, I should be able to go up at least a couple of sizes on the prop - but still learning - so all of this info is great! I was thinking that I just couldnt do FPV as I wanted on this, but had not considered strapping a bigger motor/prop combo to it.
Thanks!
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Old Jun 09, 2010, 12:52 AM
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NP bro,

If you can fit a 9", you've got lots of options. A 42gm ax2210n would be nice if you are going cheap; it will do about 25oz with 11A and a GWS9050. Note that the AX bearing tube is larger, so you may or may not have to drill new holes to fit the stock AX mount. Another thing to consider is torque; with extra power and a larger prop, you might find the torque troublesome during steep climbs and hard acceleration. Then again it might be manageable, and worth the efficiency for longer or more aggressive FPV sessions.

A Motrolfly DM2210-1700Kv will be much less torqy than the above setup. It's $36 and a portly 53gm, but with a 7x5e will do 29oz/21A. The neat part about this setup is it'll also have more pitch speed, so you won't be battling with stall as much. There's something to be said about that when your flying FPV I think.

Thing is, you're going to have to make sure these heavier motors aren't going to force you to add a ton of lead for CG. With the motor far back enough to fit a 9" prop, that's going to be a challenge I think. If it's looking impossible, a 36gm Microdan 1490 would be the hail-mary.

Cheers,
Kev
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Old Jun 09, 2010, 04:23 PM
Sparky "Electrics Rule"
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Mission, BC Canada
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Same problem. Were you able to order a replacement mount? I emailed Common Sense and phoned but as of yet no reply. I don't think I am willing to order a complete wing just for the motor mount. They also have no stock on the white Swift II which would save a little money.



Quote:
Originally Posted by twister782 View Post
just for the record. I used blue locktite on my MS composite swift 2. I used it on the screws that hold the motor on the motor mount. It shattered the mount like glass. It just crumbled to the touch. Just my 2 cents
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Last edited by bobf; Jun 09, 2010 at 05:00 PM.
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Old Jun 09, 2010, 06:01 PM
Sparky "Electrics Rule"
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I have been looking at the mount that is left and I think I can glue a piece of ply onto the front of the mount. I will try. Nothing to loose but time and I have lots of that just not a lot of energy.
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Old Jun 09, 2010, 06:50 PM
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Quote:
Originally Posted by Truglodite View Post
NP bro,

If you can fit a 9", you've got lots of options. A 42gm ax2210n would be nice if you are going cheap; it will do about 25oz with 11A and a GWS9050. Note that the AX bearing tube is larger, so you may or may not have to drill new holes to fit the stock AX mount. Another thing to consider is torque; with extra power and a larger prop, you might find the torque troublesome during steep climbs and hard acceleration. Then again it might be manageable, and worth the efficiency for longer or more aggressive FPV sessions.

A Motrolfly DM2210-1700Kv will be much less torqy than the above setup. It's $36 and a portly 53gm, but with a 7x5e will do 29oz/21A. The neat part about this setup is it'll also have more pitch speed, so you won't be battling with stall as much. There's something to be said about that when your flying FPV I think.

Thing is, you're going to have to make sure these heavier motors aren't going to force you to add a ton of lead for CG. With the motor far back enough to fit a 9" prop, that's going to be a challenge I think. If it's looking impossible, a 36gm Microdan 1490 would be the hail-mary.

Cheers,
Kev
Better yet for a wing I would recomend the Motrolfly 2210-2200 on 3s with a 6x5.5 APC, at 10.8v I got 96mph pitch speed and 806 grams (28.4 Oz) thrust 28.6 amps. I use this set up in my fun jet with a 1300 30c Sonic Power lipo.

Ken
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Old Jun 09, 2010, 07:18 PM
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He is trying to do FPV from his swift II, and needs more thrust to deal with the modifications he has made to the wing. While that is a fine setup for speed, it really isn't suitable for his application.

Diggs
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Old Jun 09, 2010, 09:23 PM
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Ok, what about using the 2210-1700 with a Graupner 8x4 slim prop, motor calc puts the thrust around 40 ounces. How much thrust we looking for?

Ken
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Old Jun 09, 2010, 09:49 PM
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Quote:
Originally Posted by Subsonic Ken View Post
Ok, what about using the 2210-1700 with a Graupner 8x4 slim prop, motor calc puts the thrust around 40 ounces. How much thrust we looking for?

Ken
I would say that's a much better choice. I am not sure of the AUW of his Swift II FPV wing, but the 1500kv blue wonder would barely fly it. So a few more oz's of thrust should do the trick. Spinning a bit larger prop would help, but you don't want to get to large and induce torque roll.

Diggs
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