RE: Pacific Aeromodel Katana 1.40  
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All Forums >> RC Airplanes >> 3D Flying! >> RE: Pacific Aeromodel Katana 1.40
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RE: Pacific Aeromodel Katana 1.40 - 11/28/2006 10:59:55 PM   
STEVESRCWORLD


 

Posts: 205
Joined: 9/27/2004
From: PAGELAND, SC, USA
Status: offline 		This plane is built very light it wont take much abuse.

(in reply to LookNatU2)
       Post #: 51

RE: Pacific Aeromodel Katana 1.40 - 11/29/2006 6:18:22 AM   
LookNatU2


 

Posts: 148
Joined: 9/3/2004
From: Cedar Rapids, IA, USA
Status: offline 		You mean you can't do a forward tumble like this plane with it??? HEHE

http://www.rcuvideos.com/view_video.php?viewkey=d9fe611d5a8e90fefdc9&page=1&viewtype=&category=



This is one of my favorites flying videos.
I fly my Profile Katana in the prior posted pic like this, well try too. Right around 200 flights on the Katana Profile this year of hard 3d and lots of re-enforced patch work.. lol (cheap built airfame but way FUN)
I'm surprized i havent crashed it, but that's the way it goes sometimes i guess. I finally retired the airfame and strictly staying with gas burning engine now.


I HATE Glow GOO!!! uggg.

< Message edited by LookNatU2 -- 11/29/2006 6:25:36 AM >

(in reply to STEVESRCWORLD)
       Post #: 52

RE: Pacific Aeromodel Katana 1.40 - 11/29/2006 6:53:33 AM   
boosted180


 

Posts: 233
Joined: 4/5/2004
From: long beach, CA, USA
Status: offline 		i flew almost the entire tank of gas for the first time today! engine still running very rich especially on the low end i think. transitions very very rough. doesnt want to idle low. on low throttle it feels like it just wants to quit.

this plane tracks very well, like a pattern plane. b/c of the light weight and huge wing area, it just floats! i moved the cg back a bit and it knife edges much better now. my lateral balance is off by quite a bit. i'll need to add some weight to the right wing for balance.

i was still worried about the engine quitting in the air so i havnt hovered it yet. but at a little over 1/2 throttle it has unlimited vertical. by the time it breaks in, i know this engine will pull this plane like a rocket.

the only main complaint i have is that it was built very strong. i needed to reinforce a lot of areas, and even still i'm a little hesitant to really ring it out. in fact on my dead stick landing, i ran out of runway and landed in the grass. it was not a hard landing at all but enough to break off the landing gear. it tore the entire block where the gear is mounted on completely off the fuse. the only thing that holds this block onto the rest of the fuse is on layer of thin plywood.

if you want to 3d this plane, you'd definitely need to do some major reinforcing (and consequently adding a bit more weight). but with the huge wing, it still should fly very light.

next time out, hopefully i'll have the engine tuned better and maybe start to have a little fun!

here are some pics.



Attachments
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(in reply to LookNatU2)
       Post #: 53

RE: Pacific Aeromodel Katana 1.40 - 11/29/2006 6:55:53 AM   
boosted180


 

Posts: 233
Joined: 4/5/2004
From: long beach, CA, USA
Status: offline 		i meant it was NOT built very strong.

(in reply to boosted180)
       Post #: 54

RE: Pacific Aeromodel Katana 1.40 - 11/29/2006 7:07:16 AM   
LookNatU2


 

Posts: 148
Joined: 9/3/2004
From: Cedar Rapids, IA, USA
Status: offline 		Right, I got what ya meant. I had a H9 Extra 260 and it was a light plane too and the landing gear was reinforced before it was ever flown. Had to do the same thing to several planes. It's a weak area in lots of planes.
Are you tuning your engine with a RPM gage?
I set my high end to max RPM at WOT (wide open throttle) then richen it up to lower the rpm by 200rpm.
Then adjusted the low end to transition to mid/high range. This is what worked for me and im sure others will have a different way. Once doing the high end as mentioned above I set the throttle at 1/2 and engine running i adjusted the low screw in small increments untill it transitioned perfect. U'll hear it perk right up. Simple, no more mid range issue's.
BTW, BE CAREFULL not to get in the running props path...LOL

< Message edited by LookNatU2 -- 11/29/2006 7:09:45 AM >

(in reply to boosted180)
       Post #: 55

RE: Pacific Aeromodel Katana 1.40 - 11/30/2006 3:24:26 AM   
boosted180


 

Posts: 233
Joined: 4/5/2004
From: long beach, CA, USA
Status: offline 		scott (from brillelli) gave me some suggestions for tuning as well. i'll try again on friday. the weird thing is that on the ground it seems to behave much better (transitions smooth, no burbling, decent idle). it's just in the air that it seems way out of tune. and yes, i am running the static pressure line to the inside of the fuse.

(in reply to LookNatU2)
       Post #: 56

RE: Pacific Aeromodel Katana 1.40 - 11/30/2006 4:42:32 AM   
LookNatU2


 

Posts: 148
Joined: 9/3/2004
From: Cedar Rapids, IA, USA
Status: offline 		Can always try it w/o the static line as well.

(in reply to boosted180)
       Post #: 57

RE: Pacific Aeromodel Katana 1.40 - 12/1/2006 11:47:06 PM   
boosted180


 

Posts: 233
Joined: 4/5/2004
From: long beach, CA, USA
Status: offline 		with a little more tweaking, the engine ran much better today. it actually was too lean, not rich as i thought. the transition is a lot better now, but i think i still need to richen up the high end. on long uplines, it feels like it just loses power towards the top. also the other day i tached it at 6900rpm but today it was only running 6200. i'm new to gas engines, so just slowly learning how to tune them.

as far as the plane, i've still got some trimming to do. feels like my cg is too far forward, way too much engine downthrust, and left wingtip still a bit heavier than right.

the only complaint i have is that when i push rudder doing a hammerhead, it does not "pivot" very well at all. even with full rudder, it still looks like a big vertical "u-turn", isntead of a hammerhead turn. it also wants to roll hard OPPOSITE rudder. really weird....

hopefullycorrecting my cg and thrust will help with these problems.

how's everyone else's planes flying?

(in reply to LookNatU2)
       Post #: 58

RE: Pacific Aeromodel Katana 1.40 - 12/2/2006 4:04:26 AM   
TOFAST4U2C



Posts: 414
Joined: 10/22/2003
From: W BABYLON, NY, USA
Status: offline 		I wanted to try a brillelli 46cc gasser up front on this bird. Any input on if that would be to much for the airframe? I was hoping the Katana wouldnt become a flying brick if there was a flame out. Any info on slow flight, bad habits, tip stalling... Thanks Jack

_____________________________

Born to CRUISE, Forced to Work!

(in reply to boosted180)
       Post #: 59

RE: Pacific Aeromodel Katana 1.40 - 12/6/2006 1:05:45 AM   
boosted180


 

Posts: 233
Joined: 4/5/2004
From: long beach, CA, USA
Status: offline 		yesterday the plane flew great! i got my cg and thrust issues fixed and it tracks very very nicely now. point rolls on uplines are right on. hovers rock solid. it's actually easier to hover this plane than anything i've flown, even foamies!

but the day ended badly when the engine quit on me during a low hover. i should have been smarter than to hover a brand new engine before breaking in, esp. when i was already having issues with it. but i was having so much fun, i could resist!

anyway, the engine just isnt happy at less than 1/4 throttle. on the ground it seems to run fine but in the air it just wants to quit at low throttle. i'll try to fiddle with the needles some more and maybe take off the velocity stack, and hopefully it'll run better.

but this is a very nice plane with a super super light wing loading! the only complaint i have is that it doesnt do tumbling manuvers (like waterfalls) very well b/c of the too long tail moment. snaps and spin type manuvers are also not that great. you can do them but they dont look as good as done on other planes. the fuse side area (vertically) is also too short. if they re-designed it to fix thes issues, this would be one awesome plane! i dont think there's any other gas planes out there with a lighter wing area. i have a carbon fiber wing tube on order and lighter muffer to be put on the plane at the end of the week. it should come out at about 13.25 lbs! 1320 wing area.

(in reply to TOFAST4U2C)
       Post #: 60

RE: Pacific Aeromodel Katana 1.40 - 4/8/2007 1:07:41 PM   
edge_540


 

Posts: 2
Joined: 4/8/2007
From: ieperieper, BELGIUM
Status: offline 		hello,

are there some video's??? anyone?? and what would you think of the mvvs 160( 26cc+walbro carburateur+reso methanol)

greetz

(in reply to boosted180)
       Post #: 61

RE: Pacific Aeromodel Katana 1.40 - 4/11/2007 3:27:34 PM   
ddotson


 

Posts: 91
Joined: 4/21/2005
From: , FL, USA
Status: offline 		Hi, thinking about this plane for a ZDZ 40, thoughts??? I don't fly all out 3d and like a plane that lands slow and predictable. I have not heard anyone comment on the quality of the hardware???
Thanks

(in reply to edge_540)
       Post #: 62

RE: Pacific Aeromodel Katana 1.40 - 4/11/2007 5:43:29 PM   
LookNatU2


 

Posts: 148
Joined: 9/3/2004
From: Cedar Rapids, IA, USA
Status: offline 		if u dont fly 3D i think a SPE40cc would do great. ZDZ good too, just cost more.

(in reply to ddotson)
       Post #: 63

RE: Pacific Aeromodel Katana 1.40 - 4/12/2007 1:45:08 PM   
ddotson


 

Posts: 91
Joined: 4/21/2005
From: , FL, USA
Status: offline 		I just happened to get a factory overhauled ZDZ 40 in trade. I have a Funtana 40 and 90. and would like to get a GOOD QUALITY katana for this engine. Just seems all I have seen are crappy color schemes, bad hardware or something. Looking for advice.
Thanks, Don

(in reply to LookNatU2)
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