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 - 10/19/2007 9:31:28 PM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		Hey guys,

Here is a video of my katana md from yesterday
Tell me what you guys think!

http://rcuvideos.com/item/55FXLBYHYVMFQLF2









thanks
itai

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(in reply to aflipz)
       Post #: 251

RE: Precision Aerobatics Katana MD Build and Fly - 10/20/2007 5:58:45 AM   
aflipz


 

Posts: 932
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		Sweet vid itai, great flying and nice inverted flatspin!

(in reply to itai)
       Post #: 252

RE: Precision Aerobatics Katana MD Build and Fly - 10/21/2007 2:04:35 AM   
vasmikey


 

Posts: 19
Joined: 5/6/2007
From: Bloomington, MN, USA
Status: offline 		Hey, just a little caution to those who have built the KatanaMD. Awesome plane and build, but my pull/pull servo arm broke out on one side during flight. No worries since it's pretty easy to land w/o the rudder, given it didnt stick to one side with a lot of force. Just keep a close eye on the integrity of the carbon/fiber control parts for weakness that's all. Because of my constant radical use of the rudder lately, I went with the nylon horn for the pull/pull and sleeping alot better.

(in reply to aflipz)
       Post #: 253

RE: Precision Aerobatics Katana MD Build and Fly - 10/21/2007 3:09:41 AM   
aflipz


 

Posts: 932
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		there is some offset built into the cf double arm (pull pull) replacing this with a straight unit is said to be detrimental to performance.

That being said i have been running straight nylon since the very beginning mostly because i can optimize arm length so that full deflection = maximum over-atv. This maximizes torque and resolution.

(in reply to vasmikey)
       Post #: 254

RE: Precision Aerobatics Katana MD Build and Fly - 10/22/2007 5:59:30 PM   
Scoubidou



Posts: 1547
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		What kind of receiver are you running guys? I fly JR and is this one too small for the Katana?
http://www.horizonhobby.com/Cart/ViewCart.aspx?TotalItemsAdded=1

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(in reply to aflipz)
       Post #: 255

RE: Precision Aerobatics Katana MD Build and Fly - 10/22/2007 6:42:49 PM   
Jeff_edge540


 

Posts: 142
Joined: 9/24/2006
From: Austin, TX, USA
Status: offline 		I am sorry to report that my Katana MD lasted only 4 flights...

I made two mistakes:
1) ignored a poor range check (getting glitches at about 20 paces) but I thought I wouldn't fly very far..
2) ignored the instructions to route the antenna across the wing - i ran it down the fuse.

I was using a Berg 7 and got radio lockout when up high in a flat spin. It spun into the ground. The cost of this ARF makes that a hard one to swallow. I'm not sure I will be replacing it until I go to 2.4ghz.

I just didn't see how to route the antenna down the wing when the wings are removable. I would have to either tape it down everytime or cut the antenna and use a bullet connector or something - neither were a good option IMHO.
But I paid the ultimate price for my lazyness and lack of good judgment.

(in reply to Scoubidou)
       Post #: 256

RE: Precision Aerobatics Katana MD Build and Fly - 10/22/2007 9:16:04 PM   
albo752004


 

Posts: 4
Joined: 5/30/2007
From: Randallstown, MD, USA
Status: offline 		Hi Jeff

Very sorry to hear about your KMD, I must admit I found the antenna placement under the
wing to be a serious nusiance and opted to run it below the fuse. To date I have not experienced any noticable radio hits, and my range check was within acceptable limits.
I'm using a FMA Direct Encore reciever, I just looked at the berg 7 specs on the Inet
and it is definitely a top notch unit. Can't say why you experienced such a serious problem.
Hope you won't give up on the KMD it is truly an awesome aircraft.


Allen

(in reply to Jeff_edge540)
       Post #: 257

RE: Precision Aerobatics Katana MD Build and Fly - 10/22/2007 10:48:35 PM   
Valve floater


 

Posts: 120
Joined: 8/2/2007
From: Port Allen, LA, USA
Status: offline 		Guys, i use an old electron 7. The little weight difference has no effect to me. Flies great. I have mine running in the fuse. I like a clean look. I have it exiting the fuse with 1/2 tail hotglued. Also hotglue throught the fuse with dots of hot glue to keep it away from the pull pull string. Not one problem in 80 flights. I like to have the ability to fly high as a dot if i feel the urge. Never had a glitch. Channel 34.


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(in reply to albo752004)
       Post #: 258

RE: Precision Aerobatics Katana MD Build and Fly - 10/22/2007 10:55:41 PM   
Greg Cothern



Posts: 593
Joined: 1/7/2002
From: Seagoville, TX, USA
Status: offline 		I am flying my Katana MD with a Berg RX and ran the antenna through the fuse and have had not a single glitch at all. The Berg is supposed to be a full range RX so I dont think one would have to do the under the wing trick, I feel that was probably suggested more for the shorter range RX's.
Sorry to hear of the demise of your Katana...

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Smart-Fly Hangar 9 Wild Hare MVVS & DA Engine''s Futaba Radio Hitec Digital Servo''s

(in reply to Jeff_edge540)
       Post #: 259

RE: Precision Aerobatics Katana MD Build and Fly - 10/23/2007 1:01:09 AM   
aflipz


 

Posts: 932
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		I have 3 berg 7p's 2 with vertical pins and one with horisontal pins. My first Katana MD had countless flights on it and i had never seen a glitch on it's vertical pinned 7P until it "died" in flight destroying my beloved MD (you can see images of the wreckage at the end of my last video)

Another one proving Murphy was right; whatever can go wrong...


Scoubidou; your link points to a shopping cart that was a temporary link; we can't see the item you had selected, to us it's just a message telling us our shopping cart at horizon hobby is empty. Just tell us the model number so we can share our views on it.

There is no such thing as too small though; just range... a berg microstamp 4L weighing less than 4 grams would be more than enough range for the Katana MD even with a shortened antenna (you do need 6ch for mixing so i won't recomend the 4L in the MD, i am just making a point)

(in reply to Greg Cothern)
       Post #: 260

RE: Precision Aerobatics Katana MD Build and Fly - 10/23/2007 12:43:15 PM   
Scoubidou



Posts: 1547
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		I have already used the JR #JSP30610, 6-Channel UL Receiver w/o Crystal,POS Shift,JR/Air on a foamy without any glitch but i do not know if i could use it on bigger electric plane like the Katana MD ?
Daniel

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(in reply to aflipz)
       Post #: 261

RE: Precision Aerobatics Katana MD Build and Fly - 10/23/2007 7:06:57 PM   
itai



Posts: 130
Joined: 12/5/2004
From: , ISRAEL
Status: offline 		i think it will be ok.
but you need to have a rang check after the plane is done.
you can read few pages back that i changed my Receiver to Berg 7P 7Ch after i did a rang check.

(in reply to Scoubidou)
       Post #: 262

RE: Precision Aerobatics Katana MD Build and Fly - 10/24/2007 12:08:29 AM   
aflipz


 

Posts: 932
Joined: 7/2/2005
From: Montreal, QC, CANADA
Status: offline 		Scoob, i have never used that rx and i can't find any info on it's actual range, i did see someone post about using it in a sailplane about as far as he could see it. If it range checks in the MD i'd go ahead and use it.

(in reply to itai)
       Post #: 263

RE: Precision Aerobatics Katana MD Build and Fly - 11/12/2007 8:25:01 PM   
Born2Fly


 

Posts: 38
Joined: 6/27/2002
From: Brooklyn, NY, USA
Status: offline
quote:

ORIGINAL: itai

Almost finished,
My weight is 1007gr 35.5oz
Where did you guys take out the antenna from? Pictures please


Hi,

Is it with or without battery?

Thanks.

(in reply to itai)