Mini Sukhoi Su-26 (oz5647)

 

Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - plan thumbnail

About this Plan

Mini Sukhoi Su-26. Radio control spoart scale model. For .049 to .10 power and 4 channels.

Direct submission to Outerzone.

Update 23/09/2021: Added article, thanks to MikeFoster.

Quote: "THIS AIRPLANE certainly doesn't require a detailed introduction. It has been written about in all the aviation publications and modeled in almost as many sizes as there are engines to suit them. I first saw the SU-26 in a small three-view that appeared in the January '85 issue of Air international. Thinking that it might become a very popular aerobatic model, I started to develop a set of plans for a version with an 82-inch-wingspan. But I never got past the roughing out stage, and I never built the plane. I should have followed my instinct and completed the plans because the model did become very popular. The December '87 issue of Model Aviation had an excellent article about it.

Scale documentation catalogues offer three-views and photos of other versions of the SU-26. Bob Banka's Scale Model Research catalogue has more than a dozen listings for the SU-26. Alain Proteau, proprietor of Repla-Tech International, has just released a new catalogue that contains a wealth of information. There are hundreds of side-view drawings of all types of aircraft, well-known and obscure, and six three-views of the SU-26. I highly recommend both catalogues as excellent documentation sources for your next serious scale project.

1/2A POWER: I don't consider this version of the SU-26 a serious scale project. Its design is based on its engine: the Cox .074 Queen Bee. There's no mistaking this for anything other than a Cox engine, but there are some differences between it and other Cox engines. It has a very attractive, effective expansion-chamber muffler. Like most Cox engines, it has a rear reed-valve intake system, and a simple but effective barrel-type carburetor has been fitted to it. The usual glow head has been replaced with a standard short-reach glow plug. No special clips are required to start the engine. It's mounted on side lug mounts, and a drilled plastic mount is also available.

JUST DUCKY: The SU-26 requires a mini airborne radio system, and the Hitec Focus 4 FM easily meets this requirement. The Micro 535 receiver and four HS80 servos are among the smallest available. This transmitter doesn't have dual-rate switches; in their place are front-panel adjustment controls to set the servo throws. This way, while I'm flying, I can have someone adjust control sensitivity until I'm comfortable with it. When you're satisfied with the setup, the linkages can be readjusted and the servo travel can be dialed back up to take advantage of the full servo travel. This should be done if any of the control-surface movements have been cut way down. I rarely change rates after the first few trim flights, so this works well for me, and there are fewer switches to deal with.

Although I use a 4-channel setup, there's no reason why two channels, ailerons and elevator, couldn't do the job. The model would be a couple of ounces lighter, and I think that it would perform well with a Cox TD .049 or an .051.

One item that I wasn't sure I'd like is the new Rub'r Duck antenna. It takes a few flights to get used to the feeling that there's something missing or that you've forgotten to extend the antenna. Flying the small Sukhoi fairly close in most of the time never presented any range problems, but what would happen at a crowded fly-in or contest?

I found out when I put this receiver in my Giant Taube and with the Rub'r Duck-equipped transmitter, flew at the Old Rhinebeck Jamboree at Rhinebeck, NY. This two-day contest has six flight lines in three groups of two. Most of the time, there are six planes in the air. I was flying from one of the center flight lines, and I had to fly close to two other flight lines at opposite ends of the field. Even in this very busy environment, I didn't experience any glitches or control problems. I thought that this was a valid test; it proved to me that this antenna does work as advertised.

CONSTRUCTION: The Sukhoi SU-26 was designed to be a small, relatively simple, aerobatic plane with eye appeal, and it isn't difficult to build. Covering the top of the fuselage is the most difficult task, and that's easier than it looks.

For maximum maneuverability, I made all the control surfaces extra-large. Its lightness and large surfaces make the model fly smoothly and perform aerobatics well. The prototype weighed 20 ounces; this was achieved with carefully chosen off-the-shelf balsa.

With the .074 Queen Bee, performance is good. A larger, light .09 or .10 would be outstanding. For those inclined, I think that the Sukhoi would make a very good, small, control-line, stunt model. The moments are almost ideal for this. A bellcrank would have to be linked to the flaps, and elevator would have to be added, but everything else would remain the same. If you're into it, you'll know what to do. Just a thought.

WING: Construction must begin with the wing because the fuselage is built around it. Join the spar halves against a straightedge so that the tip and the center legs are in line. Use hard, 1/16 balsa for the joiner. The joiner side is the trailing-edge side of the spar. Working over the plan, attach ribs W-1 and W-8 to the spar. To produce an accurate wing, you must build it on a flat surface. Fit the ribs in place on the spar, but don't glue anything yet.

When I build wings of this type, I prefer to pre-assemble the trailing edges first. If they're made straight, it will almost guarantee a true wing. Using scrap balsa, make eight assembly jigs of the same' shape as the aft end of rib W-4; these will act as temporary fixtures - four on each side - to hold the top and bottom open at the correct angle. Pin the wing to a flat surface to dry.

When the finished trailing edges are put into place on the ribs, the leading-edge notches should line up. Glue the ribs to the spar and the trailing edge. Add the 3/16 square leading edge and the 1/8 square top and bottom spars. Fit and glue all the false ribs (W-1A to W-7A) into place. Sheet-cover the center section with 1/16 balsa, as shown on the plan..."

Supplementary file notes

Article.

Corrections?

Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - model pic

Datafile:
  • (oz5647)
    Mini Sukhoi Su-26
    by Nick Ziroli
    from Model Airplane News
    January 1994 
    34in span
    Scale IC R/C Civil
    all formers complete :)
    got article :)
  • Submitted: 11/06/2014
    Filesize: 700KB
    Format: • PDFbitmap
    Credit*: JJ

ScaleType:
  • Sukhoi_Su-26 | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz5647) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Sukhoi_Su-26
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - pic 003.jpg
003.jpg
Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - pic 004.jpg
004.jpg
Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - pic 005.jpg
005.jpg
Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - pic 006.jpg
006.jpg
Mini Sukhoi Su-26 (oz5647) by Nick Ziroli from Model Airplane News 1994 - pic 007.jpg
007.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Scanned article pages are online at http://www.rcgroups.com/forums/showthread.php?t=942754
SteveWMD - 18/06/2014
Steve, Here is a picture [pic 007] of my Mini Sukhoi built from the same plans recently posted. I built it as designed for the TeeDee .09 but never installed that, and finally ended up covering it with laminating film, spray painted it and installed an Avionics Gust MS motor (1820 Kv)...with an all up weight of 13.6 oz (w/o the battery) it flies really well. She has the layout of an old control line stunter really. My only addition was the top hatch cover for the motor.
Dave - 23/06/2014
Add a comment

 

 
 

Download File(s):
 

Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

Terms of Use

© Outerzone, 2011-2021.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.