NP extra 260 ***VIDEO Link in Post #20  
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All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> NP extra 260 ***VIDEO Link in Post #20
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NP extra 260 ***VIDEO Link in Post #20 - 1/25/2008 9:09:11 PM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline 		I finished the assembly of my NP Extra 260 and ran in the OS .55ax engine today I also took some pictures of the finished product with my Funtana 40s next to it for comparison. The Funtana is larger and noticably heavier. The extra wing area on the Funtana should put them at about the same wing loading though and the Funtana has obviously larger control surfaces. My freind who also bought one of these Extra 260's is almost complete with his as well. He opted to use the Thunder Tiger Pro .61 for a power plant. The engine is significantly heavier than mine and this will make ballancing more challenging (likely having to build a tray behind the canopy in the fuse for the battery pack.) He said he might get a digital fish scale so we can compare weight. It will definately be interesting to compare the two in flight. I will add a flight report after the maiden and hopefully a video link.

EDIT://
Just some comments on the Extra 260 for those concidering purchacing one. The hardware is usable but not of sufficient quality that I would. I replaced the conecting rods with Dubro .256 solder on conectors/rods so I would not have any Z or L bend connections. Clevices on both sides for me. The fuel cell is fairly small but I was able to replace it with a 14oz Dubro in mine and a 16oz Dubro in my freinds. I replaced the tailwheel with a Sullivan because I hate the ones that you have to bend the rod and put it through the rudder. I installed Dubro pinned hinges on the ailerons and Radio South CA hinges on the tail feathers. The pinned hinges or more of a PITA than they are worth. Bottom line though I did not use the supplied CA hinges. The foam main wheels are hard like hockey pucks so they got replaced with 2 1/4 in Dubro Low-Bounce rubber tires (2 1/2 may look better). The Mounting meathod of the wheel pants are such that they would not stay on the plane very long so I just left them off (2 1/2 in wheels will not fit the wheel pants without modification). I also replaced the axles as I do not feel a bolt is a sufficient axle. I did use the supplied control surface control horns. The plane does NOT come with a spinner. A 2 1/4 spinner looks about right on it.

Recomendation to NP: Leave the hardware out of the kit and put in a nice alluminium spinner or a Carbon Fiber wing tube in it

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< Message edited by Mr67Stang -- 1/29/2008 11:32:06 PM >

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RE: NP extra 260 - 1/26/2008 10:38:08 PM   
SFMMcoasters


 

Posts: 50
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Great pictures. I'm even more excited to start mine now!

(in reply to Mr67Stang)
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RE: NP extra 260 - 1/26/2008 11:59:04 PM   
opjose



Posts: 4995
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		Good job!

You touched on most of the build considerations very well.

IMHO I find the CMP kits they sell a bit better, while the Evergreen type ARFs require a bit more "fiddley stuff" exactly as you've noted.




I also recommend applying a few coats of Top Flite Clear coat after your model is built but before you fly it the first time or run the engine.

Remove the canopy or any clear plastic and apply several light coats.

This will seal the trim areas from Nitro.

Nitro WILL cause the adhesive used to give over time, so if you do not do this you may find the trim and covering coming off.

It's a cheap fix needing a few minutes worth of work.

Most ARFs from most manufacturers will benefit from this.




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Build em'', fly em'', crash em'' and build more.

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RE: NP extra 260 - 1/27/2008 8:33:45 AM   
SFMMcoasters


 

Posts: 50
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Can I ask what servos you used?

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RE: NP extra 260 - 1/27/2008 2:51:59 PM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline 		I used Hitec HS425 BB servos. They are just a standard ball bearing servo. The Funtana 40s in the pictures uses Tower Hobbies standard ball bearing servos as well. I have found that 40 size planes do not need anything more than this. You can of course get high torque metal gear servos if your budjet allows but it really is not required however the extra weight of them may be helpfull on the tail if used only for the rudder and elevator if you choose to use anything larger than a .46 BB engine.

The good news is it's a beautiful Sunday morning here and I will be maidening the Extra 260 today. My camera man is ready so we should have some video. This will be his first time on the camera so we can only hope he can keep the plane in frame. Unfortunately there are no clouds so there will be no backdrop reference to actually see what the plane is doing.

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RE: NP extra 260 - 1/27/2008 3:31:06 PM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline 		Some build pictures...

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RE: NP extra 260 - 1/27/2008 3:46:00 PM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline 		Some more pictures including my freinds with the TT Pro .61 mounted.

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RE: NP extra 260 - 1/28/2008 3:24:00 AM   
SFMMcoasters


 

Posts: 50
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Waiting anxiously for a flight review!

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RE: NP extra 260 - 1/28/2008 3:40:50 AM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline 		The maiden went extremely well concidering the gusty winds, of course blowing perpendicular to the runway

The instructions show the ballance point at 103 mm (4.06 in) so I set it at about 4.25 in and called it good. I was truely impressed as the plane needed only two clicks down elevator after getting it in the air for trimmed flight and inverted flight was almost hands off. Just a little down pressure on the elevator. Knife edge pulled to the landing gear but not dramaticly. Inverted flat spins are well within reach of this plane with some more CG adjustment. Snaps are violent and quick. Tumbles and spins are just plain fun. The OS .55 AX with the 13x4w prop is ballistic. I cant wait till it's fully broken in so I can get a propper transition from idle to low/mid power so I can actually work on hovering this thing. I did find it difficult to hover due to my overcontrolling the tail feathers. The relitively short tail moment makes it very responsive. Some thrust alignment may be in order to as it always pulled to the left on virtical climbs and hover attempts. This plane will knife edge loop! I need more practice with it as this is my first plane that I have tried that manouver with but it did it twice for me The roll rate is very good. I will probably say excellent after upping the aileron throws. The elevator is large enough that it will stall the plane when pulled 100% making corkscrew loops so pretty loops will take finess. The gusty conditions probably did not help either.

EDIT// High alpha (harrier) flight wing rocked like crazy past about 25 degrees pitch but as stated it was very gusty and I did NOT laterally ballance the model.

I did get several minutes of video that I will need to cut splice and just plane go through. I will post a link here (probably later this week) when I get something compiled.

< Message edited by Mr67Stang -- 1/28/2008 3:47:03 AM >

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RE: NP extra 260 - 1/28/2008 3:42:42 AM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline
quote:

ORIGINAL: SFMMcoasters

Waiting anxiously for a flight review!


You posted this while I was typing it

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RE: NP extra 260 - 1/28/2008 3:52:42 AM   
SFMMcoasters


 

Posts: 50
Joined: 12/18/2007
From: La Verne, CA, USA
Status: offline 		Sounds great. I can't wait to order my own.

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RE: NP extra 260 - 1/28/2008 6:24:23 AM   
Mr67Stang



Posts: 2003
Joined: 4/26/2006
From: , NC, USA
Status: offline
quote:

ORIGINAL: SFMMcoasters

Sounds great. I can't wait to order my own.


Oh, I thought you already ordered one and was awaiting delivery?

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He who dies with the most toys wins!

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