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Precision Aerobatics Katana MD Build and Fly

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Precision Aerobatics Katana MD Build and Fly

Old 07-08-2007, 10:27 PM
  #151  
vasmikey
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Default RE: Precision Aerobatics Katana MD Build and Fly

Funny story today whilst I was doing the final assembly of my Katana MD; I put it on the balance after installing the battery and my wife drives up and takes a look. She says, "honey, notice anything interesting about those wings?" "What?" I cried. She continues, "what are those aileron servos doing on the TOP of your wings?" "You never put them there!" She then called me a huckleberry and went inside. sigh! I looked more closely and guess what? I installed the wings backwards/upside down. The strange thing is that the wing is perfectly symetrical and that it fit backwards and the guide pins and nylon screw fit perfectly too! duh! Anyway, reversed them in about 10 minutes and I was doing some test taxi stuff in my front yard. I'm sticking to the excuse that I was tired.
Old 07-08-2007, 10:44 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly

Should have said "It's meant to be like that honey, shows what you know" then turnaround raising your nose...


A guy did that on his seagull extra (inverted the wings) because he was making it a belly lander and didn't want to break servo gears with arms, rods and horns grabbing in the grass. I top
mounted the servos on top on my modified ultrafly extra300s also for that reason.
Old 07-09-2007, 11:24 AM
  #153  
vasmikey
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Default RE: Precision Aerobatics Katana MD Build and Fly

Does anyone know what a high pitch sqeeky sound coming from my outrunner means? It squeeks when I first start moving the throttle stick upward then ceases as the RPM increases. Any thoughts gentlemen?
Old 07-10-2007, 08:55 AM
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lucky9910
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Default RE: Precision Aerobatics Katana MD Build and Fly

Guys what is your fight time with TP 2100 & 40amp esc? Trying to decide which plane to purchase with my current set up.
Old 07-10-2007, 02:43 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly

flight time; 10-12 minutes of mixed flying easy.


vasmikey; the "squeek" you hear is from the electric pulses the esc sends to your motor to start it up, i think the sound is caused by some mis-timed or counter productive pulses that are inevitable starting from a dead stop or from very low rpm's. These can be pretty noisy, they use the same type of pulsing to emit programming tones out of the motor (note your esc has no beeper or speaker on board, it uses your motor as a speaker!) Cool eh!

anyway it is nothing to worry about.
Old 07-10-2007, 09:57 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: lucky9910

Guys what is your fight time with TP 2100 & 40amp esc? Trying to decide which plane to purchase with my current set up.
8-10 minutes safe. some people say over 10 minutes, depends on how hard you fly it.
Old 07-12-2007, 02:01 PM
  #157  
itai
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Default RE: Precision Aerobatics Katana MD Build and Fly

Almost finished,
My weight is 1007gr 35.5oz
Where did you guys take out the antenna from? Pictures please
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Old 07-16-2007, 07:37 PM
  #158  
TNTtrucks
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Default RE: Precision Aerobatics Katana MD Build and Fly

Does anyone have, or have a link to a Katana MD for G3 or 3.5? I found the mini on the Swap Pages but wanted to try the MD. Thanks.
Old 07-16-2007, 08:27 PM
  #159  
Greg Cothern
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Default RE: Precision Aerobatics Katana MD Build and Fly

My goodies from PA arrived this evening, motor is installed, working on the servo's (making extensions for the ailerons and elevator). Hope to have quite a bit done tomorrow evening.
Old 07-16-2007, 11:49 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: TNTtrucks

Does anyone have, or have a link to a Katana MD for G3 or 3.5? I found the mini on the Swap Pages but wanted to try the MD. Thanks.
There isnt any YET, hopefully soon someone will do one for us
Old 07-16-2007, 11:51 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: Greg Cothern

My goodies from PA arrived this evening, motor is installed, working on the servo's (making extensions for the ailerons and elevator). Hope to have quite a bit done tomorrow evening.
Keep us informed about your build and how you like the plane!
Old 07-17-2007, 06:55 PM
  #162  
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Default RE: Precision Aerobatics Katana MD Build and Fly

Well I had wanted to finish the K-MD but alas probably wont happen today.... I ordered the CF servo arms, while I like them and they are cool and will work good, I am very frustrated with them, for the cost and such it would have been nice for them to come drilled to fit the PA servo's, or atleast with the appropriate sized drill bits to make them fit.
I LOVE the CF control horns they are great...
I hope to have the radio gear finished this evening, with only to finish up the ESC, motor, air scoops, and cowl mounting tomorrow..
Old 07-19-2007, 09:50 AM
  #163  
vasmikey
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Default RE: Precision Aerobatics Katana MD Build and Fly

I finished my Kantana MD. It flew great. Only needed one click of up trim and lateral balance was perfect.. (see if I can make my PICs appear.) thanks all for the super advice.
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Old 07-19-2007, 09:54 AM
  #164  
Greg Cothern
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Default RE: Precision Aerobatics Katana MD Build and Fly

I would like to see some PICs of how folks mounted their ESC's in the K-MD please??
Old 07-19-2007, 10:47 AM
  #165  
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Default RE: Precision Aerobatics Katana MD Build and Fly

I have to take my cowl off the plane, but I nylon strapped mine across the bottom of the motor mount so the outgoing air to the bottom opening of the cowl hits it directly to cool it.

If you look earlier in this thread, Itai has some really great PICs of his mounted across the the side so the air can get it from the front. That is basically the principal involved. The thing needs a lot of air. Dont forget to open the hole at the rear of the fuse to allow air to escape.

hope this helps,
michael
Old 07-19-2007, 12:07 PM
  #166  
vasmikey
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Default RE: Precision Aerobatics Katana MD Build and Fly

Here are itai's pics from earlier in the thread. I will get my cowl off and take a few pics as well.

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Old 07-19-2007, 04:53 PM
  #167  
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Default RE: Precision Aerobatics Katana MD Build and Fly

I ended up putting the ESC underneath the battery tray, anyone think that will cause a problem?? I am running the PA Thrust 30 with the PA Quantum 40 amp ESC. The CG appears to be smack dab in the middle with the battery pack in the middle of the battery tray..
Old 07-19-2007, 04:57 PM
  #168  
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Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: Greg Cothern

I ended up putting the ESC underneath the battery tray, anyone think that will cause a problem?? I am running the PA Thrust 30 with the PA Quantum 40 amp ESC. The CG appears to be smack dab in the middle with the battery pack in the middle of the battery tray..

that's where mine is... no problem at all
Old 07-19-2007, 05:04 PM
  #169  
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Default RE: Precision Aerobatics Katana MD Build and Fly

Thanks....
Old 07-20-2007, 05:56 AM
  #170  
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Default RE: Precision Aerobatics Katana MD Build and Fly

Hello Itai,

I'm planning to cpy your E/Z connectors idea!

Do you consider it as a safe solution?

Did they bring you any trouble?


Thanks for sharing,

Nice flights.
Old 07-20-2007, 01:53 PM
  #171  
itai
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Default RE: Precision Aerobatics Katana MD Build and Fly

Yes it is safe no trouble at all, easy to build and adjust but I think it is 2 gr heavier then PA
Supplied z- bends. Right now I am changing them to Lightweight aluminum E/Z connectors to save some weight.
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Old 07-20-2007, 03:25 PM
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Default RE: Precision Aerobatics Katana MD Build and Fly

you guys should seriously consider the type of ez connectors that screw in with a nut on the bottom, these press fit ones are not so great; they always have a ton of slop in them and good for small slowflyers only, they become loose over time and even risk coming out completely under excessive force. The nut type you can set with medium ca on the threaded part and it will never come out.


Also, CF does not like pressure points; it fractures, delaminates and breaks. when you tighten the screw on the ez connector you crush the rod and it becomes loose fibres eventually tearing, if you do use this method at the very least when you are done adjusting the lengths and are satisfied with their placement wick a small drop of thin ca on the carbon rod on both sides of the connector rod so it seeps into whatever crack in the cf rod their may be and makes it nice and secure.
Old 07-20-2007, 07:41 PM
  #173  
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Default RE: Precision Aerobatics Katana MD Build and Fly

I bought an extreme flight 2814/820 motor with an e-flite 40 amp speed control, will this be enough power? drove across town to central hobbies and Von said that a lot of the customers were buying an extreme flight 2819/900 motor with a 35amp controller. I dont know which one would be a better match. Thanks

Kyle
Old 07-20-2007, 09:21 PM
  #174  
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Default RE: Precision Aerobatics Katana MD Build and Fly

The recomended setup is enough power, yours is too much! It's about 1.3 oz heavier than the recommeded motors but feel free to try it.. Other than that Your speed controll is just about perfect.

2818/900 with a phoenix or airboss 35 is good enough I use a phoenix 45 and it's nice to have that kind of peace of mind but it's not necessary at all.
Old 07-20-2007, 10:40 PM
  #175  
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Default RE: Precision Aerobatics Katana MD Build and Fly

you will have really crazy power with that setup!, if you have balance problems because of the heavier motor, you can place the rudder servo in the tail, there is a rudder servo slot in the rear of the fuse if you ever need to install it there.

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