Walkera Mini CP helicopter - Devo 7 TX.

Walkera Mini CP helicopter - Devo 7 TX.

I have finished building the Walkera Mini CP completely from scratch with a pile of parts bags and some of 
my Genius CP parts (servos, swash, main shaft, main blades, and rotor head set). 

I brought the spare part of walkera from hobbyhot.com



First Impressions:


The Mini CP looks sharp and is ultra stable. More stable than the Genius CP IMO. It flies nice and smooth. The tail holds well in full pitch pumps.
There is no CCW yaw like there is with the Genius CP, at least for my MCP.

The Mini CP takes a crash very well flying over grass and hitting throttle hold before crashing.
I crashed it in a tight fast turn, flying, and inverted. There was no damage at all. Even the main gear didn't slip down.
I am using a 50% across pitch hold curve. This will help minimize damage in a crash as the swash and blades will be at mid stick zero degrees pitch. 
The swash does not move with with these settings. CURVES PITCURVE: HOLD - 50-50-50-50-50 





Pros: 

Things I like with the Mini CP over the Genius CP.


1. The landing gear is separate from the frame.

2. Servos are mounted very secure and are very close to the main shaft. 

3. RX mounted vertically. No foam between the RX and frame mount.

4. Canopy mounts with two separate CF rods.



Cons: 

1. The flight time is VERY short! I struggled to get 2 minutes flight time even with the Hyperion 240 mah battery.

2. The canopy is very dark and is hard to see. I will be using the GCP canopy instead when I fly.





Transmitter Settings: These are in my sticky thread.

http://www.rcgroups.com/forums/showthread.php?t=1325037





Flight time: - Stock brush motor. Stock Genius CP battery.

• 2 Minutes: 3.85V - Power got weak at about 1:40.

Flight time: - Stock brush motor. Hyperion 240 mah 25C battery.

• 2 Minutes: 3.89V - Power got weak and had to land.

Thrust Test: - Stock brush motor

• 55.8 grams full negative pitch in stunt mode with the stock Genius CP battery.
• 79.5 grams full negative pitch in stunt mode with the Hyperion 240 mah 25C battery.

Head Speed: - Stock brush motor

• 4,500 RPM at mid stick 100% throttle with the stock Genius CP battery.
• 4,860 RPM at mid stick 100% throttle with the Hyperion 240 mah 25C battery.

Helicopter Weight: - Stock Mini CP 


Note: I used all the Motor and ESC plugs. Removing these and the ESC heat shrink will reduce the weight some more.


AUW = 44.9 Grams with stock battery.



More Weights:

• Landing Gear: 1.1G
• Frame: 2.4G
• Servo Holder: 0.2G
• Tail boom with motor, fin, and tail blade: 3.2G
• RX2632V-D Receiver : 2.8G
• Main Gear: 0.6G
• Main Motor: 9.8G
• Main Frame Bearing: 0.3G
• Stock Battery: 6.0G
• Hyperion 240 mah 25C battery: 7.7G

Specifications:

1). Overall Length: 220mm
2). Main Rotor Dia. : 241mm
3). Tail Rotor Dia. : 42mm
4). Gyro: Three-axis 
5). All-up Weight: 45g (Battery included)
6). Main Brush Motor: 1220FC
7). Tail Brush Motor: 0615R
8). transmitter: DEVO-6/7/12 (Not included) 
9). Standard transmitter: DEVO-8S (Not included) 
10).Receiver: RX2632V-D Optional 
11).Servo: wk-02-4;weight: 2.42g;speed: 0.12sec/60°(3.0~4.5V);dimension: 16.5*6.8*15.7mm
12).Battery: 3.7V 240mAh Li-Po



How to remove the main gear:


http://www.rcgroups.com/forums/showp...postcount=2531

http://www.rcgroups.com/forums/showp...postcount=2533


How to fix the coil on a Minicp RX(WOWS SILiCONE DOES NOT WoRK!) 


http://www.rcgroups.com/forums/showthread.php?t=1624581


There are a few mini CP mods that many people think should be done out of the box:


http://www.rcgroups.com/forums/showp...8&postcount=10


mini CP servo arm 90 degree issue


http://helifreak.com/showthread.php?t=388603


Mini-CP short flight time 


http://helifreak.com/showthread.php?t=385328


Settings for the mini's RX Ail/Ele gyro screw


http://www.rcgroups.com/forums/showp...&postcount=101





Parts that are the same on the Genius CP and the Mini CP:

• Servos - But the servo arms are different. See pictures below.
• Swashplate
• Tail boom - The GCP tail boom says Geniuns CP and the MCP tail boom says Mini CP
• Main Shaft
• Frame Bearings
• Rotor Head Set - There are two different part numbers for the Genius CP and Mini CP Rotor Head Set. I don't know what the difference is
  if any between the two. I am using the Genius CP Rotor Head Set on my Mini CP.

Parts that are different between the Genius CP and the Mini CP:

• RX
• Frame - Also the MCP has seperate landing gear.
• Main Gear
• Canopy
• Servo Holder 
• Tail Blade
• Main Motor
• Ball Linkage Set 
• Battery
• Main Blade- The Mini CP blades are .5mm slimmer and about .1gm lighter than the Genius CP blades. Also the MCP blades don't have the yellow color on the tips like the Genius CP do.

Final Note:

GCP = Genius CP
MCP= Mini CP



Just found this out after placing my order to convert my GCP to the MCP.
The GCP servo arms are different than the MCP servo arms.
The GCP servo arm is straight, the MCP servo arm has a bend in it (see picture).


I was planning on using my GCP servos on the MCP. 
Those of you that are converting your GCP to the MCP it looks like
you may have to get the MCP servos also. 

See these posts also.


http://www.rcgroups.com/forums/showp...postcount=2342