it would be good if anyone could help me out with the following:-

1. weight of avionic tx battery 2200mah 8c??

2. prop data for multistar 4220-650kv motor in 4s (motor available at rcproduct.in )??

3. choosing a motor for the X-UAV Talon, which motor to choose for the following options??
   -3s 22000mah and a motor and prop comb for 1 kg thrust @ 10-14amps!!
   -4s 16000mah and a motor and prop comb for 1 kg thrust @  7-11amps!!
   -5s 11000mah and a motor and prop comb for 1 kg thrust @  4-6amps!!

4. my present choice for the Talon motor is a multistar 4010-375kv motor with a 15inch prop in 6s (genetrates 1kg thrust @4.7amps), the problem is how on earth am i going to launch it??

5. while boosting a graupner 2.4ghz radio with a 2W booster will the telemetry range also be boosted??(in graupner the radio supports two way (talametry) connection)??

6.will an APM2.5 display airspeed via OSD, if so will it be accurate??

Thanks in advance!!  

Quote from: subhashjk0508 on January 05, 2015, 10:33:22 AM
4. my present choice for the Talon motor is a multistar 4010-375kv motor with a 15inch prop in 6s (genetrates 1kg thrust @4.7amps), the problem is how on earth am i going to launch it??

i have no experience in this case, but some info got while searching.

Recommended motor config:
Motor: Gfroce 3542-1100kv brushless outrunner
Prop: 9 x 6 E
Battery: 4S LiPO

From: http://www.valuehobby.com/talon-fpv-grey.html

so in this case 15 inch props you mentioned should touch ground while takeoff/landing.

There is no prop data for the motor!! And ya the takeoff is the problem!!

For the motor Turnigy Multistar 4220 650 KV the following is published data

Spec:
KV(RPM/V): 650
Lipo cells: 4s
Max Surge Watts(W): 240
Working current: 13 amps
Max.current(10s): 17 amps
No Load Current: 0.7 amps
Intemal Resistance: 0.120 ohm
Number of Poles: 16
Dimensions(Dia.xL): 42 x 25 mm
Shaft: 3 mm
Prop: 10 x 4.7 - 11 x 4.7
Weight: 65g

Calculated maximum static thrust at 9000 rpm (14.8 V * 650 KV):

10 X 4.7 - 0.99 kg
11 X 4.7 - 1.44 kg

Sir thanks for that!! But i was looking for more elaborated data like  prop-current-thrust-% of throttle !!

The way to get that is to put it on a test bench and measure. Even E Max does not give these curves.

Some more on this topic here:

http://www.rcindia.org/electric-power/selection-of-motor-esc-prop-and-lipo-for-foam-planes/25/

But hk or better multistar do give prop data, the prop data for the motor 4010-375kv Which i mentioned in my first post here is:-

http://www.hobbyking.com/hobbyking/store/uploads/157718249X745660X25.jpg

edit:- i could Not find the prop data for 4220-650kv motor!!

bump!! anyone??

4220-650 thrust and power consumption at 50/80/100% throttle using 11x5.5

www.youtube.com/watch?v=4ADBrgDVwK4

Thrust vs RPM graphs for dozens of props available at flybrushless.com

Topic named changed...    

Please read this :  http://www.rcindia.org/rc-india-forum/forum-usage-tips/  (especially #12 two times!).

@KK Iyer sir- thanks for that!!

@Anwar sir- sorry for that, will keep it in mind next time, and sir this is not about multirotor it is a plane, would not fit under multirotors!!