3D Electric Flying! Discuss all aspects of Electric 3D RC flying here!

Precision Aerobatics Katana MD Build and Fly

Reply

Old 12-21-2009, 11:27 AM
  #476  
SkaBob
Member
 
Join Date: Aug 2009
Location: Detroit, MI
Posts: 45
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

It balaned well without much movement of the battery. I didn't want to move it too far forward, so I added 1/4oz weight inside the front of the cowl and that got it perfect again whenI turned it inverted.

Still a bit puzzled by the rudder/KEbehavior. When Iflew my dad's 260 it was beautiful onKE, and when I pulled the battery out Itested the tension of his pull/pull cable and honestly I was shocked. It's SERIOUSLYwhatI'd consider "loose", having been told it should be tight and sound like a guitar string when plucked. WhenI had mine that loose on the KMD, even on high rates the plane would fall out of the sky when I put it onKE...

I'm actually using a weaker servo in the tail than I had on the pull/pull (cooked the servo motor of the original trying to get the cable tighter to see if that'd help - now THATwas tight!heh), and while it's not PERFECTyet, at this point it's trim and balancing to keep it level in KE, rather than falling out of the sky no matter whatI do, and Idon't need to have it at a super severe AoA to keep it up there.
SkaBob is offline  
Reply With Quote
Old 12-21-2009, 11:28 AM
  #477  
aflipz
Senior Member
My Feedback: (10)
 
Join Date: Jul 2005
Location: Montreal, QC, CANADA
Posts: 1,299
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

indeed it is... Still KE'ing mine on my 3 year old HS65hb's no problem to report.
aflipz is offline  
Reply With Quote
Old 12-21-2009, 02:26 PM
  #478  
aflipz
Senior Member
My Feedback: (10)
 
Join Date: Jul 2005
Location: Montreal, QC, CANADA
Posts: 1,299
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

are you trying to KE on low rates by any chance?
aflipz is offline  
Reply With Quote
Old 12-22-2009, 10:19 AM
  #479  
SkaBob
Member
 
Join Date: Aug 2009
Location: Detroit, MI
Posts: 45
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

Initially I had (because a few of my other 3d planes don't have a problem with it), but I was having trouble even getting the rudder to be effective in turning the plane in level, upright flight, so I got into a habit of keeping the rudder on high rates all the time.

On high rates it will KE with enough speed, power and the right angle of attack now - butthere's a good deal of coupling to the bottom of the plane that Ihave yet to try and mix out.

Really, I'm wondering if I should look to see if something's wrong with mine. Everyone's always said how effortless and amazing the plane is in every thread I've read about it, but mine's built nice and straight and honestly...If I had another electric to fly (it's winter up here, and nitro gets SUPERcold on your hands), I wouldn't really be that enthusiastic about taking the KMDout of the garage.

I'm going to see if Ican get the KE problems fixed with trim and mixing, but there hasn't been any good weather on the weekends lately for me to try that. I'm going to bring the KMD with me this saturday to see if there's room at the indoor place we're going to fly at. It's a huge dome that has multiple football (soccer for the Americans) fields in it, so if there isn't too much traffic it might work...

Really though...should Ibe having these sorts of problems, at all?Nobody's mentioned needing any mixing when inKE, or any problems withKE, and the videos I've seen don't require anywhere near the angle of attack that mine needs in that situation...

Mine isn't over-weight, and it's balanced perfectly. I can fly hands-off inverted, and it doesn't change it's flight angle if Iput it inverted on a 45 degree upline...
SkaBob is offline  
Reply With Quote
Old 12-22-2009, 02:43 PM
  #480  
aerofundan
Senior Member
 
Join Date: Mar 2005
Location: PTY, , PANAMA
Posts: 573
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: SkaBob

Initially I had (because a few of my other 3d planes don't have a problem with it), but I was having trouble even getting the rudder to be effective in turning the plane in level, upright flight, so I got into a habit of keeping the rudder on high rates all the time.

On high rates it will KE with enough speed, power and the right angle of attack now - but there's a good deal of coupling to the bottom of the plane that I have yet to try and mix out.

Really, I'm wondering if I should look to see if something's wrong with mine. Everyone's always said how effortless and amazing the plane is in every thread I've read about it, but mine's built nice and straight and honestly...If I had another electric to fly (it's winter up here, and nitro gets SUPER cold on your hands), I wouldn't really be that enthusiastic about taking the KMD out of the garage.

I'm going to see if I can get the KE problems fixed with trim and mixing, but there hasn't been any good weather on the weekends lately for me to try that. I'm going to bring the KMD with me this saturday to see if there's room at the indoor place we're going to fly at. It's a huge dome that has multiple football (soccer for the Americans) fields in it, so if there isn't too much traffic it might work...

Really though...should I be having these sorts of problems, at all? Nobody's mentioned needing any mixing when in KE, or any problems with KE, and the videos I've seen don't require anywhere near the angle of attack that mine needs in that situation...

Mine isn't over-weight, and it's balanced perfectly. I can fly hands-off inverted, and it doesn't change it's flight angle if I put it inverted on a 45 degree upline...
IF while in knife your KMD is tucking to the gear then you are definately waaay tail heavy, move your cg forward at full rudder it knife edges itself alone with no aileron / elevator correction required.
aerofundan is offline  
Reply With Quote
Old 12-23-2009, 09:25 AM
  #481  
SkaBob
Member
 
Join Date: Aug 2009
Location: Detroit, MI
Posts: 45
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly


ORIGINAL: aerofundan

IF while in knife your KMD is tucking to the gear then you are definately waaay tail heavy, move your cg forward at full rudder it knife edges itself alone with no aileron / elevator correction required.
At PA's recommended balance point (the one in the manual), I was perfectly balanced before Iadded the 1/4 oz. to the front of the cowl with the battery I fly with in it (2200mah 3cell).

What other things can Ilook at that would cause coupling towards the gear?It's not gradual coupling...it's pretty severe unless Icorrect early on in KE...

From level flight my uplines are no-input straight, inverted and inverted uplines as well... That's what's got me puzzled about it. It should be behaving beautifully...
SkaBob is offline  
Reply With Quote
Old 01-19-2010, 04:03 AM
  #482  
MalaysianFlyer
Senior Member
 
Join Date: Jan 2003
Location: KL, MALAYSIA
Posts: 1,032
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

My KMD....
















MalaysianFlyer is offline  
Reply With Quote
Old 04-17-2013, 06:58 PM
  #483  
alchem13
Junior Member
 
Join Date: Apr 2013
Location: Peytion, CO
Posts: 2
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

Just starting a Katana MD build. Question I have is that my lipo's I have on hand are from 188g to 193g and was wondering if I will run into cg problems. Are people using heavier packs no prob, or should I leave wheel pants off? Want to use pull-pull so don't want to relocate rudder servo. Any feedback would be good. Know it is an old thread so...
alchem13 is offline  
Reply With Quote
Old 04-17-2013, 07:16 PM
  #484  
3dsky
My Feedback: (84)
 
3dsky's Avatar
 
Join Date: Jan 2003
Location: New Berlin, WI
Posts: 456
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

We are using 172g and 186g 3S batteries we move the CG around for a different feel. CG set range for us is the front servo mounting screws to the servo output shaft screw. Plane has a wide CG range. Both our planes are stock setup, keep the pants off until you get the plane set up. If you are on tall grass swap out the wheels to a bigger diameter then add the pants. We had problems with the wheels cracking and the axles wearing out the wheels. GREAT flying plane.
3dsky is offline  
Reply With Quote
Old 04-17-2013, 07:21 PM
  #485  
alchem13
Junior Member
 
Join Date: Apr 2013
Location: Peytion, CO
Posts: 2
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

Thanks for fast reply. Can't wait to get it in the air. Weather sucks for the rest of the week though.
alchem13 is offline  
Reply With Quote
Old 07-04-2013, 05:20 AM
  #486  
happyal
Senior Member
 
happyal's Avatar
 
Join Date: May 2003
Location: Isle of Man, UNITED KINGDOM
Posts: 314
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

Hello,

I'm interested in this plane as a first 3D plane. My question is does it fly like it does on the Phoenix sim?
happyal is offline  
Reply With Quote
Old 07-06-2013, 12:49 PM
  #487  
3dsky
My Feedback: (84)
 
3dsky's Avatar
 
Join Date: Jan 2003
Location: New Berlin, WI
Posts: 456
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Precision Aerobatics Katana MD Build and Fly

Fly’s better in real life, getting the CG, control setup (expo) for your style is going to be the key to success. Very light feel with the stock power will help you learn fast. Good Luck Great plane.
3dsky is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service