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Prop for MS Composit Swift II and MS Mini Swift

Old 05-21-2011, 10:18 AM
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Davethebluessinger
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Default Prop for MS Composit Swift II and MS Mini Swift

Hi,
I've just built an MS Composit Swift II and wondered if anyone can advise me on props please?
Initially I'm looking for reasonable aerobatic performance and not too worried about super high speeds as I'm fitting her out with LED strips for night flying.

I have 2 outrunner motors available a 1400kv and a 2600kv and will be running a 30A ESC (mounted outboard on top surface for cooling) with a 20C 1000mAh 3S battery.
Maximum prop diameter is 8"

I also found a great deal on the MS Mini Swift and as I've just written off my Nano Slipstream I decided I'd buy one and re- use the electronics.
Setup will be 500mAH 2S with a 12A ESC I've treated the plane to a new motor as the tiny 3000kv on the Nano would have been struggling so the new spec is M2222/25 2850kv MicroMotor weighing in at 15g.
This plane will mainly be flown on a field approx 200 yards square so again super high speed speed won't be top priority.

Any help or suggestions would be greatly appreciated!
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Old 05-21-2011, 02:56 PM
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CHELLIE
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If you used the recomended motor, then a 8x6 APC prop should work well for you with the swift II. if you want to slow it down a bit, a 6x4 prop will work well too.

http://www.rcgroups.com/forums/showthread.php?t=802534

Axi's Gold Line brushless motor and a 8x6 prop: a recipe for success — and speed. Notice how the the prop is installed: the numbers face the motor.
************************************************** ************************************************** *******************

On the Mini Swift with the m222/25 motor, use a 7x5E or a 6x4E prop on 2 cells, and a 4x3 graupner prop on 3 cells

http://www.giantcod.co.uk/m222225-28...-p-404962.html


In-Stock: 10
Packed: 40.00g


Rating: (2 reviews)
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£5.95





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Please note: Manufacturer's prop recommendations are a guideline only. Use a wattmeter to ensure that your motor doesn't exceed the stated current.

Kv (rpm/V): 2850
Power (W): 60
Wire Winds: 25
Resistance (mΩ): 485
Idle Current (A): 0.7
ESC (A): 10
Cells Ni-Cd/Ni-MH: 6-12
Cells Li-Po: 2-4
Prop: 7x5E
Weight: 15g

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by thomasDate Added: Tuesday 05 April, 2011hi again ! motor works still brilliant ! it pulls 9,8amp“s with a 4x3 graupner prop on full throttle. greats

by thomasDate Added: Monday 21 February, 2011hiho ! super fast delivery !!! ***** nice little motor !!! use it on a 50cm swift mini wing, 10amp esc 300mha 11,1v lipo 2x 9g servo ~145g. i would recomend a graupner 4x3 prop and it goes vertical 3x3 is to small.. maybe it will be ok in use with a 14,8 lipo ?! greats jones

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Old 05-22-2011, 01:37 PM
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Hiya Dave
I treated my MS SwiftII to a 1550 purple pearl and I use a Graupner slowfly 7.5-4 Dualsky 850mAh 3c. For the way I fly it it works out just right. IMO that would be pretty close to your 8.6 with the 1400kv.
My Mini Swift is another story. I have one of those 2300-2800 kv 15g motors 500mAh 2c with a 6-3 prop its kinda fast or at least it was for me when it was my 3rd plane At least I don't have to hold my breath anymore while I fly it. Heres a vid with the right info on it. First flight took me half the vid to trim it. http://www.youtube.com/watch?v=ih9eC4wvQrE
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Old 05-22-2011, 04:15 PM
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Davethebluessinger
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Thanks Chellie and Scruffy, You've both given me something to work with. I've nearly completed the build on the Swift II including installing the LEDs but I think I'm going to have to add weight to the nose. MS recommend a COG line 180 to 185mm back from the nose but my COG is 50mm further back! I'm using a 1000 mAh 3S pack thats 83g the total all up weight is 440g. I'm wondering if the COG quoted is for slope soaring and not allowing for the motor.

Dave
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Old 05-22-2011, 09:09 PM
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Originally Posted by Davethebluessinger View Post
Thanks Chellie and Scruffy, You've both given me something to work with. I've nearly completed the build on the Swift II including installing the LEDs but I think I'm going to have to add weight to the nose. MS recommend a COG line 180 to 185mm back from the nose but my COG is 50mm further back! I'm using a 1000 mAh 3S pack thats 83g the total all up weight is 440g. I'm wondering if the COG quoted is for slope soaring and not allowing for the motor.

Dave
Hi Dave rather than adding dead weight, get a 1300mah 3 cell lipo, that may put the cg where it needs to be at, and 1300mah lipos are cheap now days. $6.99

http://www.hobbyking.com/hobbyking/s...idProduct=6790
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Old 05-22-2011, 09:14 PM
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Thanks Chellie but even a 2200 doen't put the CG at 185mm!
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Old 05-22-2011, 09:40 PM
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Originally Posted by Davethebluessinger View Post
Thanks Chellie but even a 2200 doen't put the CG at 185mm!
I had to use 4- 50 cal. lead bullets to get the cg on my wing



50 cal. 45 cal. and 9mm


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Old 05-22-2011, 09:49 PM
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Default Annie Oakley?

Wow that's good grouping Chellie !
How high and how fast was the wing moving when you fired the shots?

What span is your wing? I'm wondering If I should use the 2200 cells instead of the 1000s I bought for the job....
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Old 05-22-2011, 10:29 PM
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Hi Its the mini bee that i converted from brush to brushless I shot those groups at 250 yards with a 50 cal black power rifle doing 80 mph LOL JK, the wing span is 34.5 " sure use the 2200mah lipo is useful weight, it might help to put the lipo in crossways to get more weight towards the front, Take care and have fun, Chellie

http://www.atlantahobby.com/Store/pc...ee-29p4059.htm
http://www.wattflyer.com/forums/showthread.php?t=28242

Last edited by CHELLIE; 05-22-2011 at 10:52 PM.
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Old 05-22-2011, 11:00 PM
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Default SwiftII with LEDS

Just thought I'd see how effective the LEDs are at dusk......
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Old 05-22-2011, 11:38 PM
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Originally Posted by Davethebluessinger View Post
Just thought I'd see how effective the LEDs are at dusk......
Your going to have people calling in a UFO Sighting it looks great with the lights
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Old 05-23-2011, 12:12 AM
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Talking

Oh I do hope so!!!
Managed to find the strips at £5/metre from Giant Cod thats about 50% cheaper than anywhere else in the UK!
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Old 05-23-2011, 02:05 PM
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I Org. had one of those blue wonder motors in mine. I swapped it out with the little screamers PP 1550kv when it was on sale. The two motors weight with props were pretty close when mounted. I think the BW bearing tube was a little longer putting it back a tad. I did a light build and the 850mAh balanced it just right. I hope you like to read heres a thread on the SwiftII form "that other site"
http://www.rcgroups.com/forums/showthread.php?t=540977
enjoy 180+pages
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