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SU - 37 (Sukhoi) With Functional Canards

Old 04-14-2013, 10:59 PM
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jmrpb
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Talking SU - 37 (Sukhoi) With Functional Canards

SU - 37 (Sukhoi) With Functional Canards

(Version 7)


This is my late Sukhoi 37 with functional canards and only three servos. Please, look carefully at picture number five for more details on the linkage. To achieve correct movement of the canard we must cross link it with elevons. Example: link right elevon with left canard and left elevon with right canard.

It was a serious headache , and lots of hours burned, but I finally figure it out and managed to do it with just 3 servos. In the end, it was worthwhile! This babe can manoeuver like a 3D airplane, and with just 3 servos I kept the weight as low as possible.

It has a simple way of vectorial thrust, like some of other pusher planes. It does almost any 3D manoeuvre that you can think of, with a very good vertical performance. And, of course, it is also very forgiven and stable if you want to. Most of the times, I catch it by hand on landings. It has KF airfoil number 4 (up and down - Acro). It works great!!

The power system is the great secret for good low speed and high speed performance.

The specifications are:

Motor: Axi 2208/34 gold line;
Propeller: Graupner 9” 6” Slim cam (exactly 9” 6”, not the smaller ones like you guys use. This is because the 9” 6” is perfect for acceleration from slow speed and high AoA and also have great behavior at high speeds);
Batteries: #1 Lipo 3 / 850 mA/h with 30C;
Speed controller: Jeti 8A (yes; just only 8 Amps, but this is more than enough. With this power system I can maximize my flight times – 10 minutes with 3D and Acro performance or 12 minutes plus with gentle use of the throttle stick (this is, if you can control yourself with this kind of bird ).

The ailerons and the elevators are linked together by one carbon tube. Like stated before, to achieve correct movement of the canards we must link right elevon with left canard and left elevon with right canard.


Roughly, the dimensions are:

Front to tail: 89 cm (overall length);
Front to leading hedge of the wing: 39 cm;
Wingspan: 64 cm;
Leading hedge swept angle (wing): 45º;
The tip of the wing (outer far part of the wing is): 11 cm (with ailerons);
Ailerons have: 10 cm (at the widest point);
Elevator swept angle is also: 45º;
Dimensions of rudder (at widest point): 18 cm tall by 13 cm wide (at the bottom);
Weight: 345 grams or ~ 12,5 oz to ~ 13,5 oz range. Ready to fly (with this set up and battery).

The front part is made of blue ‘polypropylene’ that makes it almost, and I say ALMOST, indestructible.


I hope that this brief description helps.
I will post a video as soon as possible.

It does have KF airfoil number 4 for aerobatics.

It looks great in the air with this painting scheme (blue marine camouflage) and it’s guaranteed that you’ll receive all the attention of other RC fellow pilots!

Check out the photos below.

Follow your dreams and fly like there is no tomorrow,

José Bernardo

Lisbon, Portugal, Europe

Please enjoy as much as I do.
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Old 04-14-2013, 11:05 PM
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Default SU - 37 (Functional canards) V-7

Here are some photos:
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Old 04-14-2013, 11:12 PM
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Default Canard correct movement (link connections)

Canards correct movement:

Finally, to achieve correct movement on both canards, You have to crosslink the elevons with the canards. This is: Connect right elevon with left canard; connect left elevon with right canard (please see picture number 5 - SU - 37 n5).

This is a great airframe for 3D aerobatics!

Follow your dreams and fly like there is no tomorrow!


Bernardo
Lisbon, Europe, Portugal
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Old 04-14-2013, 11:17 PM
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Default SU 37 - with active canards 3D Aerobatic

Here is a video of my SU - 37 performing some 3D aerobatics (active canards):




[media]http://www.youtube.com/watch?v=plnm-gMV2CY[/media]

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Last edited by jmrpb; 04-11-2016 at 03:22 PM.
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Old 04-15-2013, 06:20 PM
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Great design and video!

Do you have plans for it.....if so, could you post them for all to see?

Thanks for your good work,
Steve
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Old 04-15-2013, 07:22 PM
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Looks and flys great ! Not ultra fast but for aerobatic maneuvers, it can basically do everything. Loved the flat spin. I've built several 'prop in the slot' pusher park jets (F-22, F4J, F-15,DeaDart but none with canards. Me too would like to see plans.

-Hawk
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Old 04-17-2013, 07:31 PM
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Hi! I’m glad that you have liked it! Sorry, but I don’t have the plans.

However, this is a very simple airplane to build. It’s based on the SU - 37 by Steve Shumate (JetSet44 - callsign in this forums).

I just made it simpler - I mean Profile, and then added KF airfoil nº4 for aerobatics (top and bottom exactly symmetrical).

I also enlarged the elevons (about 130% total area). To achieve correct movement the canards must be crosslinked with the elevons (please see image number 5 -> SU 37 n5.jpg file).

The great secret of this airframe is the power setup, more exactly the propeller. I use a 9’*6’ slim prop by ‘Graupner’ that is great for quick accelerations. It won’t be the fastest plane at the airfield but it will be one of the best for dogfight and 3D aerobatics.

Follow your dreams and fly like there is no tomorrow!

Bernardo
Lisbon, Europe, Portugal
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Old 04-17-2013, 07:33 PM
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Sorry, I don't have any plans! But this airplane is based on the SU - 37 by Steve Shumate.

Kind regards,
Bernardo
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Old 04-17-2013, 08:24 PM
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dahawk
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Thanks Bernardo,

Nicely done. Shumate has designed some great Parkjets. Vlessie too.

BTW,

You sure have a beautiful place to fly !

-Hawk
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Old 05-01-2013, 09:55 AM
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Default Dimensions and Angles

The pictures below show my KF airfoil design made of 6mm depron and the dimensions of my ailerons and elevators.

Follow your dreams and fly like there is no tomorrow!

Happy flights and happy landings!

Bernardo
Lisbon, Europe, Portugal
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Old 05-01-2013, 02:32 PM
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Thanks again for posting the drawings with dimensions of your changes to the SU37.

Yesterday I forwarded your video to a friend of mine and he can't believe how aerobatic your plane is. (I think he's hooked on building it too)

Steve
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Old 06-10-2013, 02:16 PM
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Hobby Lobby carries the AXI motor, but I'm not seeing the Graupner 9x6 prop. Have you tried another brand, or have you found another source for the prop?
Thanks,
Steve
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Old 06-15-2013, 11:50 AM
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Sorry for my late replay. I was on Vacancies abroad.

I bought them from Graupner web site. Here it is:
www.graupner.de


Here is the complete link:
http://www.graupner.de/en/products/6...5/product.aspx


Sometimes they appear on ‘eBay’. If you cannot find them I think that you can buy any odder brand with that dimensions: 9’ * 6’.

Hope to hear from you soon,

Follow your dreams and fly like there is no tomorrow!


Bernardo
Lisbon, Europe, Portugal
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Old 06-15-2013, 02:28 PM
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Thanks for your reply...I have some APC 9x6 props on hand, so I'll give them a try when the time comes.

Looking forward to flying this little beauty someday.
Steve
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Old 01-17-2014, 11:42 PM
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Main Advantages:

- Fast roll rate;
- Fast and tight loops;
- Very good flat spin;
- Very stable and predictable in inverted flight;
- Very good high angle of attack (AoA) and high alfa;
- Tremendous slow fly;
- Incredible 3D aerobatics (just see the video above ;
- Very stable and forgiven airframe;
- Easy landings (most of the times I catch it by hand);
- Three airplanes in one (If You cut out the canards you will get the Sukhoi SU - 35 ‘Super Flanker’ or the SU - 27);

Follow your dreams and fly like there is no tomorrow!

Bernardo
Lisbon, Europe, Portugal
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