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Kommentar: where to buy
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= Mounting plan =

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=69565}}]]
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KategorieMotoren

see also: ROXXY2827-35, ROXXY2827-34, ROXXY2815, ROXXY2824-34, AntriebsTheorie

Inhaltsverzeichnis

  1. Photo
  2. where to buy
  3. Features
  4. Technical data
  5. Mounting plan
  6. Thrust over current
    1. Different props
    2. APC Propellers
      1. 13x6,5 APC
  7. How to read the curves
    1. Example
    2. Flight time
  8. Rotation direction
    1. Clockwise (seen from above)
    2. Counter-clockwise (seen from above)

Photo

http://gallery.mikrokopter.de/main.php/v/tech/MK3538a.jpg.html

http://gallery.mikrokopter.de/main.php/v/tech/MK3538b.jpg.html

http://gallery.mikrokopter.de/main.php/v/tech/MK3538d.jpg.html

where to buy

The Motor is custom made for MikroKopter only. You can buy it here

Features

This motor has long wires (52cm), a short shaft and a small clipring. So it can be mounted directly on the aluminium arm.

http://gallery.mikrokopter.de/main.php/v/tech/MK3538e.jpg.html

Technical data

Voltage Lithium:

3-6

Current:

max 20A

Current max. (60 Sek.):

25 A

RPM/V:

770 Rpm/V

Propellers:

10" - 14"

Efficiency:

must still be measured

Electrical power:

max 350 W

Thrust max.:

max 2200 g

Weight (only motor)

100g

Weight incl. cable and adapter

125g

Dimensions:

h=38 d=35 mm

Shaft diameter:

4 mm

Mounting plan

http://gallery.mikrokopter.de/main.php/v/tech/MK3538.jpg.html

Thrust over current

Different props

http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve.gif.html

Same curve in higher resolution:

http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_0-8A.gif.html

APC Propellers

http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_APC.gif.html

13x6,5 APC

http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_APC13x6_5.gif.html

How to read the curves

With this curves it is easy to estimate the needed current and even estimate the flight-time.

You can read the needed current for each needed thrust

Example

The total weight of a MikroKopter (4 Rotors) is 1400g -> so each motor needs a thrust of 350g for hovering (1400g / 4 = 350g)

http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_0-8A_howto.GIF.html

Current needed for 350g with the 13x6,5 APC - Propeller? -> 1,8A

Current needed for 350g with the 12x8 APC - Propeller? -> 2,4A

The total current for all four motors would be 7,2A (4 * 1,8A) or 9,6A (4 * 2,4A)

Flight time

You can estimate the flight time with this formular:

Time = 54 * Lipo / Current

(54 because we estimate 10% losses -> 60 * 0,9)

In case we would have a 3300 Lipo (3,3Ah), the Flight time for the 13x6,5 would be:

Time = 54 * 3,3 / 7,2 = 24,7 min

The same for the 12x8 Prop:

Time = 54 * 3,3 / 9,6 = 18,5 min

That is a different of 33% in flight time!

See also: FlugZeit

Rotation direction

Clockwise (seen from above)

Connection:

  • A = gray
  • B = blue
  • C = black

Counter-clockwise (seen from above)

Connection:

  • A = blue
  • B = gray
  • C = black


KategorieMotoren