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Old Dec 06, 2009, 05:24 PM
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TurboCinqy's Avatar
Tiel, The Netherlands
Joined Apr 2007
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Squary-Bat Micro Depron Combat 30x30cm

Hi,

Last week I made a small Indoor combat airplane with as idea "Keep it simple"
Pusher props makes a plane very unstable at lower speed. That's why it is in the front.

A few days ago I made the first flight but it was really bad.
CG was way of so the elevator was really really touchy. A bit down input reacts in a 90 degrees angle down.

After some mods today flew it indoor and it flies great and easy. I didn't get it in a stall. Even with fully up elevator and turning small corners.

I have some mods in mind but this one is good enough.

Mods to made. Sleeve in de wing 1cm to the front to get the CG better more easily, some reinforcements on the main skid and something to prevent tipping over.

Setup

14gr HXT C1822 BL motor. 10gr HXT 2000kv is more than enough.
6x3 GWS prop
6A ESC
2x 4gr servo
2s240 but 2s360 or 2s460 is also an option.
small 4ch receiver and TX with delta-mix.(ailevon)

AiW 74 gram with this setup. (I recommand 100 grams maximum )
CG @ 7.5 / 8cm of the leading edge.

Leading edge is 3mm carbon tube. If you want you also could put that on the back to safe your controlls with a impact form behind.
Controlls:

Neutral 2mm up.
max. 2.5cm Up.
2cm down.
3 or 4 cm ailerons up/down

Downthrust is zero at the moment but -1 degrees should be better I think.


Here some photo's and a movie.
Also a few sketches.








a few screenshots












Movie:
Squary-Bat Combat Indoor Airplane (5 min 31 sec)



"Plan part 1"

"Plan part 2"


For the builders "Have a lot of fun with it"

Greets, Dennis
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Last edited by TurboCinqy; Dec 09, 2009 at 11:46 AM.
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Old Dec 06, 2009, 05:43 PM
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jettlagg's Avatar
USA, MI, Battle Creek
Joined Jun 2008
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Good idea bringing that motor back like that. Nice work dennis.
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Old Dec 06, 2009, 06:32 PM
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phoneguy's Avatar
Tarpon Springs, FL
Joined Apr 2002
497 Posts
Dennis, That is a really cool design, in fact I have been looking to build a little combat bird like yours. I just ordered a C1822 motor,( there was only two left). Thanks for your great work.
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Old Dec 09, 2009, 04:42 AM
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Asuncion, Paraguay - South America
Joined Dec 2003
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My Squary

Hi Dennis, I liked very much your squary, here's mine. I'm using 6mm depron that have on hand, will it fine ??
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Old Dec 09, 2009, 08:05 AM
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TurboCinqy's Avatar
Tiel, The Netherlands
Joined Apr 2007
252 Posts
6mm is fine. It's a bit havier but you got more stenght instead.

Don't make it too havy. Above 100 grams it will fly with the right motor but it need to go faster and with a crash the impact is greater.

I think the V2 version got two studs at the front. So a 4 point landing gear.

Ground take of is only possible by putting it on his tail and rocket lounge it.

Greets, Dennis
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Old Dec 09, 2009, 10:46 AM
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Asuncion, Paraguay - South America
Joined Dec 2003
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Thank you Dennis, I will post new pictures as I go forward in the build.
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Old Dec 09, 2009, 11:53 AM
7up
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USA, KY, West Liberty
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@TurboCinqy

Looks like it flies really well and has plenty of punch when needed.

Nice job.
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Old Dec 23, 2009, 02:52 PM
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Joined Jun 2008
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Dennis

Quote:
Originally Posted by TurboCinqy View Post
Hi,

Last week I made a small Indoor combat airplane with as idea "Keep it simple"
Pusher props makes a plane very unstable at lower speed. That's why it is in the front.

For the builders "Have a lot of fun with it"

Greets, Dennis
I was looking for a KISS indor plane and found your thingy! Great, just about *exactly* what I was looking for. I put it into rhino and made some initial mods, all of the are still subject testuing as we start buildung tomorrow:

- Nose support removed and added two carbon stings
- cosmetic mod of lateral surfaces

what do you think?
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Old Dec 23, 2009, 04:56 PM
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A nice simple design, perfect lil' square for indoor combat.
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Old Dec 23, 2009, 06:02 PM
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TurboCinqy's Avatar
Tiel, The Netherlands
Joined Apr 2007
252 Posts
Nice mods and drawings.

I think the CF pins break of very easily but my landingsupport is also a problem with hard landings.

Last weekend I tried too stick it to the sealing.
A few times it worked but more the prop hits the sealing and the plane drops like a brick down without engine power.

And I had a (n almost) full speed midair.

See movie. @ 7min36

BMC Indoorvliegen 20 december 2009 deel 2-2 (8 min 18 sec)


In part one my x-mas project @2min20

BMC Indoorvliegen 20 december 2009 deel 1-2 (7 min 49 sec)
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Last edited by TurboCinqy; Dec 29, 2009 at 09:29 AM.
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Old Dec 24, 2009, 12:50 AM
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TurboCingy
Quote:
Originally Posted by TurboCinqy View Post
Nice mods and drawings.

I think the CF pins break of very easily but my landingsupport is also a problem with hard landings.
we will buid it that way and I'll let you know how fast they really breack off. It will be either rods or thin flexible square section carbon. I will certainly add some foam on the inside of the side rails. An alternative we had in mind was a half circle going around the prop with a bracing to the middle fin. I guess we will have all cases to test it :-)

greets

chris
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Old Dec 24, 2009, 02:26 PM
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TurboCinqy's Avatar
Tiel, The Netherlands
Joined Apr 2007
252 Posts
Oh btw. Your landing pins ends beyond the CoG so it wil flip over.

CG is around the motormount.

Maybe a half moon all to the front with a gap in it for the prop. I think 6mm depron is better. Or thin CF plate.
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Old Dec 29, 2009, 03:28 AM
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New York
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I love the design...
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Old Feb 15, 2010, 04:35 AM
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TurboCinqy's Avatar
Tiel, The Netherlands
Joined Apr 2007
252 Posts
Hi,

Here a movie with some Squary-Bat On-board vids.

Indoorvliegen 14 februari On-Board Spy Cam (7 min 27 sec)


Key Chain Spy Cam.
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Old Feb 16, 2010, 02:44 PM
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Tiel, The Netherlands
Joined Apr 2007
252 Posts
Hi,

Today I made V2 for a friend of mine.

This time with mm depron and skits on both sides.

Sleeve in the fron 2cm of the edge instead of 2.5cm.

And cambered the fin a bit at the back so it stays more easy on his tail to make vertical take offs.

Motor mount from two layers 0,33mm CF Not glued yet.

And used a strip of glasfiber tape around the sleeve.
The yellow one above had a lot of prop damage around it at the moment. Tape would prevent that.

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