RE: Sukhoi SU-26 MX build  
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RE: Sukhoi SU-26 MX build - 2/12/2007 3:38:51 PM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		Looking good tom you will be covering it before long .

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I've learned that you cannot compare yourself to others -they are more screwed up than you think.

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       Post #: 576

RE: Sukhoi SU-26 MX build - 2/13/2007 2:25:55 AM   
tom1178


 

Posts: 71
Joined: 7/25/2006
From: Upstate, NY, USA
Status: offline 		I'll probably start covering the wing next week, still have a lot of work to do with installing the radio, pushrods, fuel tank, engine, etc. Worked a bit on the cowl tonight. Ugh. The one supplied with the kit is an absolute piece of garbage. I'll just use the one supplied until it breaks, I imagine that will happen before the aircraft even flies. The place thats formerly Stans fiberglass is where i'm looking to get the cowl and bellypan from. That and fiberglass specialties inc are the only places that I know if. Does anybody know if there are any differences between the two companies and their product? I've seen posts in this thread from others using both.

< Message edited by tom1178 -- 2/13/2007 3:25:06 AM >

(in reply to Cyberwolf)
       Post #: 577

RE: Sukhoi SU-26 MX build - 2/13/2007 9:43:41 PM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		Tom I have used both glass products from Stans and fiberglass Specialitys and have found that Stans has less pin holes by far and as a rule is a lighter but just as strong of a product .
You may also want to check with GB themselfs, they make the glass cowls and pans for there ARF SUK,that I am sure is the same.The glass parts that came in my one kit was of the highest quality ,why they stopped putting them in there kits is beyond me. Myself I wouldn't waste the time and paint to use the ABS parts that come with there kits .Mine lasted about 2-3 flights before it started to crack and split. Good Luck.

_____________________________

I've learned that you cannot compare yourself to others -they are more screwed up than you think.

(in reply to tom1178)
       Post #: 578

RE: Sukhoi SU-26 MX build - 2/14/2007 4:59:27 AM   
tom1178


 

Posts: 71
Joined: 7/25/2006
From: Upstate, NY, USA
Status: offline 		Cyberwolf, I looked on goldbergs website, the ARF su-26 is discontinued however you can still order parts for it. The fiberglass cowling though is out of stock which i'm also assuming out of production. I'll probably go for Stans. I cut and glued the ABS cowl that was supplied and am very disappointed, There is really no possible way to fill/sand/paint the cowling without it being completely obvious where the seams are. Reminds me of the ultimate biplane I built 10+ yrs ago, exact same idea with the cowl and it disappointed me then. This cowling is almost twice the size of the ultimate so the seam etc.. will also be twice as large/noticeable. It's one of those things where it is hardly noticeable but I MYSELF will notice it so it is a problem.

I was able to find lustrecote paint to match the monokote covering/color I plan on using. The color has been discontinued but I found it in the LHS so I bought it, all 3 cans. two of them are very old, and the third is fairly new. I've used lustrecote to match before on a project and it matched very well. Under flourescent light where I built that aircraft it was night/day difference but when brought outside the colors matched perfectly in the sunlight. It was on a Top Flite Corsair. Have to wait and see about it this time. If it comes down to it... from research on this site I know I have a few other options. And no I won't say what the colors are going to be, not going to unveil the final colors/scheme until it is done

Supposed to get several feet of snow tomorrow so hopefully I can get a lot more done!

(in reply to Cyberwolf)
       Post #: 579

RE: Sukhoi SU-26 MX build - 2/14/2007 9:58:03 PM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		Ahh a secret color code is in the mix *L* I wish you well with the lusterkote some of it I have really liked but for the most part I have found it works great for painting the lines on the highways, but they do frown on blue or green lines I can't imagine why *S*. Anymore what I do is take a piece of my covering material and go down to the auto paint supply store and have them mix me up a can or 2 .then go over that with 2-3 coats of poly clear coat and its bullet proof.But I only do this to my larger planes because of the expense.For white I just get a pint of Base coat and mix it myself a little will go a long ways.

I'm sure you will like the cowl and belly pan from Stans I have delt with him for several years and so far have never been dissapointed in his products .Your correct about the seams on the ABS parts ,it will take quite a bit of bondo or spot putty to fill it. Then filler primer and reg primer a person gets way more time in one of them than there worth ,plus they break after a few flights.

_____________________________

I've learned that you cannot compare yourself to others -they are more screwed up than you think.

(in reply to tom1178)
       Post #: 580

RE: Sukhoi SU-26 MX build - 2/15/2007 5:33:04 AM   
tom1178


 

Posts: 71
Joined: 7/25/2006
From: Upstate, NY, USA
Status: offline 		The auto paint supply store has always been an option. I figure if the lustrecote doesn't match after using it on the ABS then when I get some money for the fiberglass parts I'll look into matching the color that way.

The last major purchase I need is servos. Probably going to look into purchasing from servo city, the prices seem very good. Haven't decided what to buy but have gotten a lot of ideas from others in this thread. I may be getting a new radio so it's all still up in the air. I'll probably buy two servos to start so I can use them to start setting up pushrods etc.

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       Post #: 581

RE: Sukhoi SU-26 MX build - 2/15/2007 2:17:03 PM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		Speaking of servos I think I seen you say you was going with the stock configuration ,which is fine ,Couple things to keep in mind ,the 2-56 rod thats supplied is not the best and the servo tray itself, just don't glue the servo tray in untill the servos are mounted to it.Or don't cover the belly of the plane untill your servos are mounted and hooked up,as the screws about half of them are all but impossible to reach once thats been done. The linkage can be hooked up but its a PITA.That is about the only miss I felt the plane had,some very poor thought went into the servo tray layout .
With your engine size a 100 OZ on the rudder and a 70 for a single on the elevator

_____________________________

I've learned that you cannot compare yourself to others -they are more screwed up than you think.

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       Post #: 582

RE: Sukhoi SU-26 MX build - 2/15/2007 4:00:45 PM   
tom1178


 

Posts: 71
Joined: 7/25/2006
From: Upstate, NY, USA
Status: offline 		Yeah i noticed that the 2-56 rods supplied with the kit are a bit lacking. I ordered some 4-40 rods etc from tower hobbies. I am thinking about going with two elevator servos, on the Ultimate I built a long time ago the one servo for the elevator was definitely lacking, there was way too much flexibility in the rod also. I don't think it was me that said I was going to use standard servos. Was looking at Hitec 645MG for the rudder, and 545BB on the elev and ailerons. Have to see about cost but those are the cheapest I coud find for what I want them to do.

(in reply to Cyberwolf)
       Post #: 583

RE: Sukhoi SU-26 MX build - 2/16/2007 1:44:02 AM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		Sounds good although I'm not familiar with the 545 Hitech servos my book does not show them .
I did use the 645 on the rudder, twin servos on the elevators halfs which are standard and had some 605's for the ailerons.Which are 70oz but they not longer make them. What I found when I added the larger engines the servos just would not hold it well in a KE and the roll rate went way to a point using the standards I had in it .Don't get me wrong ,the plane will fly and fly well with Standards all the way around ,but to me its allot more fun with some better servos in it.

_____________________________

I've learned that you cannot compare yourself to others -they are more screwed up than you think.

(in reply to tom1178)
       Post #: 584

RE: Sukhoi SU-26 MX build - 2/16/2007 2:42:07 PM   
tom1178


 

Posts: 71
Joined: 7/25/2006
From: Upstate, NY, USA
Status: offline 		Just checked again, I meant to type the 635HB, the 545 Hitechs aren't being made anymore.

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       Post #: 585

RE: Sukhoi SU-26 MX build - 3/6/2007 3:33:11 PM   
smarkfagan


 

Posts: 32
Joined: 5/10/2005
From: Pittsburgh, PA, USA
Status: offline 		My first post in this forum. Have been reading it for awhile. I'm building one too, here's what I've picked:

OS 120AX
Bisson Pitts
Hitec 635 Rudder
Hitec 475 Elevators (dual, in tail)
Hitec 475 Ailerons
Hitec Standard Throttle
14 oz tank
Fiberglass Specialties cowl

May not seem like much servo power to some but this is my 3rd year at the hobby and won't be doing anything crazy in the sky. After the trainer I built a 4*60 and now this.

My kit too suffers from poorly fit parts, had to do alot of trimming to get things to fit right. Sofar the wing is done, tail surfaces, and the fuse up to where I'm ready to put on the tail. Should be covering soon.

Anybody else think the servo tray is really flimsy - from what I can tell it only attaches at the front and rear, so the whole tray is like a trampoline.

Also, the tank tray - I take it you don't glue the tray in place, just rubberband the tank to it and wedge it in with foam?

One last question - not sure what to do about fitting the cowl over the pipes without cutting away the entire bottom of the cowl. Thought about installing the muffler after the cowl (with small access hole for allen wrench) or cutting pipes short enough.

I welcome any thoughts regarding my setup or questions.

Thanks in advance,
Steve

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       Post #: 586

RE: Sukhoi SU-26 MX build - 3/6/2007 4:21:59 PM   
Cyberwolf



Posts: 1050
Joined: 1/10/2004
From: Blackfoot , ID, USA
Status: offline 		For starters the servo tray does need some rails under it to make it stronger.I seen the one where the guy made it removable and thats a dang good idea.it would be well worth the extra time it would take. Ok on to the tank plate it is glued in solid and once the tank is installed before covering its all but impossible to remove and get the bands back on it .so again a removable tank floor is a good idea.

As far as your cowl goes it depends on which muffler you use as to how much has to be cut away .Both of mine use after market mufflers and all I have is holes out thru the bottom.I have a Jtec on my 160 and a bisson on the 2300 ST ,seems like I niped the ends from the bisson and added some rubber hose ends for the extensions , the jtec was already short enough not to have to do this .Good luck there a nice flying plane .

_____________________________

I've learned that you cannot compare yourself to others -they are more screwed up than you think.

(in reply to smarkfagan)
       Post #: 587

RE: Sukhoi SU-26 MX build - 3/6/2007 5:42:00 PM   
smarkfagan


 

Posts: 32
Joined: 5/10/2005
From: Pittsburgh, PA, USA
Status: offline 		Thanks for the info. Planned on some rails under the servo tray, maybe I'll look into making it removable. Already did that with the tank plate as it severely bends with the loading from the rubber bands.

Even with a removable tank plate, where would the access be from? I'd rather not make the front bottom plate removable as it acts as a big structural gusset for the front end of the aircraft.

As is, the exhaust pipes project about an inch and a half beyond the bottom of the cowl, and exit right at the mock air scoop inlet. Can't get the cowl on without some mod. Also was thinking about cutting the exhaust tips shorter and adding some silicone tubing. Any idea how hot the pipes get typically? This is my first pitts (first cowled plane) and have no feel for how hot (and if tubing would be a problem).

Next question: went with the Fiberglass Specialties cowl but didn't order a bellypan yet; does the stock ABS bellypan suffer much stress (as I hear the cowl does) or could I get away with it for now?

Also my carb is a good 4 inches from the firewall, how does anyone recommend connecting the linkage and still have it be as slop-free as possible.

Thanks again
Steve

(in reply to Cyberwolf)