RE: Precision Aerobatics Katana MD Build and Fly  
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All Forums >> Electric Aircraft Universe >> 3D Electric Flying! >> RE: Precision Aerobatics Katana MD Build and Fly
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RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 6:22:55 AM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		Great thread Itai! I saw some of your posts on the other forum. I decided to join this thread too if you'll have me on board

Here is some footage my friend shot of mine in some wind today;

http://www.youtube.com/watch?v=OkQEGtNC44U

(in reply to itai)
       Post #: 51

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 7:26:38 AM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		Hi aflipz
thanks for joining, no problem, I was waiting for some one that already flies the plane.
Do you think EF 35 A esc is good choice?

(in reply to aflipz)
       Post #: 52

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 7:29:27 AM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		I think it will be just fine with a 12x6E prop The esc will only be seeing very short bursts above 31-33A and it is rated for 35 continuous with bursts above that. With the good airflow this cowl has it will not be a problem.

(in reply to itai)
       Post #: 53

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 3:43:57 PM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		this is my reciver gws 8 gr


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(in reply to aflipz)
       Post #: 54

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 4:10:28 PM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		I like the battery tray, it is well mounted, it has sufficient holes to allow airflow to cool the battery and it has a groove that holds the Velcro from moving up and down.
The only thing I added is six foam rubber dots that I cut with a hollow punch tool. Then I pressed it to a double sided transparent tape and cut it round. Stick it to the battery tray and you're done.


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(in reply to itai)
       Post #: 55

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 5:53:56 PM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		be carefull with that radio, it only has a 250 metre range if i am not mistaken... Possibly less! (especially with all the cf in this bird)

(in reply to itai)
       Post #: 56

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 10:25:06 PM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		Yes I think it is 250, but very light,
I will perform a few range checks, if there will be a problem I will change it.
I think 200 meters is good for a small 3D electric, after 100 meters it looks to small.

(in reply to aflipz)
       Post #: 57

RE: Precision Aerobatics Katana MD Build and Fly - 6/3/2007 11:12:44 PM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		oh yeah without a doubt you will be able to keep it in range, you just have to remember what the range is. Using full range rx's in all but the smallest application myself i don't think about it anymore, if my KMD had a shortened range i might forget and exceed it one day inadvertantly, while chasing a seagull out of my airspace for instance!

(in reply to itai)
       Post #: 58

RE: Precision Aerobatics Katana MD Build and Fly - 6/4/2007 2:27:42 AM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		itai, you inspired me with the foam rubber battery tray pads. I just copied you and cut some thin strips that i applied to some of the diagonal parts on the cf battery tray. I glued them on with shoe goo; a rubber like adhesive that behaves a little like contact cement but is completely reversible (just scratch and peel it off if you need to) This will work great!

(in reply to aflipz)
       Post #: 59

RE: Precision Aerobatics Katana MD Build and Fly - 6/4/2007 6:26:39 AM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		pics please

(in reply to aflipz)
       Post #: 60

RE: Precision Aerobatics Katana MD Build and Fly - 6/4/2007 10:54:34 PM   
Snootch



Posts: 51
Joined: 2/1/2002
From: Naples, FL, USA
Status: offline 		Itai,

Here is a test graph to help you decide on the ESC.

My setup:

- PA Thrust 30
- Castle Creations 45
- FlightPower 2170mAH 3s1p Evolution 25C

APC E prop 12x6





Max Amp Draw: 32.1 Max Watts: 339


APC E prop 13x6.5






Max Amp Draw: 38.8 Max Watts: 416


Ralph P.



< Message edited by Snootch -- 6/5/2007 3:18:38 AM >

(in reply to itai)
       Post #: 61

RE: Precision Aerobatics Katana MD Build and Fly - 6/5/2007 1:33:46 AM   
aflipz


 

Posts: 934
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		That proves with your 35A airboss esc you have absolutely nothing to fear on a 12x6, and a relatively safe 13x6.5 setup with good ventilation and some throttle management.

(in reply to Snootch)
       Post #: 62

RE: Precision Aerobatics Katana MD Build and Fly - 6/5/2007 5:53:27 AM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		ok 35 A airboss ESC is the one

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(in reply to aflipz)
       Post #: 63

RE: Precision Aerobatics Katana MD Build and Fly - 6/5/2007 5:55:24 AM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		thanks snootch ,aflipz

(in reply to itai)
       Post #: 64

RE: Precision Aerobatics Katana MD Build and Fly - 6/5/2007 1:38:40 PM   
Red7fifty


 

Posts: 351
Joined: 1/20/2003
From: Palo Alto, CA, USA
Status: offline 		Also, check the BEC specs......If one has a higher BEC output, I would choose that one for better power to the servos.

(in reply to itai)