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Old Apr 04, 2016, 09:53 AM
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The Simple Sim

There is a build thread on this plane:
http://www.rcgroups.com/forums/showthread.php?t=1857177

and foam cuts are available from Bob Neitzke from Hoosier Cutout Service who has the files to make several different sizes out of several different foams.


CUT AVAILABLE:
http://www.hoosiercutoutservice.com/planes/andrad.htm


Here is a link to a night video of our latest prototype for a 30" F3P.

simple sym f3p (1 min 49 sec)


And an indoor video of the current plane:
S3 dueling dragon edition (3 min 55 sec)


And here is a video of a 45" version of the bird:

Large Sim SYM sam Biplane (0 min 0 sec)


It is a biplane featuring elliptical wings and tail and is symmetrical top to bottom.

Other design features include no reinforcement other than foam, Extreme light weight, and only dollar store board (with a scrap of foam paper plate).

Several versions are in the design thread with other reinforcement schemes.

The plan is a minimum number of parts and the whole thing goes together in just a few minutes really.

For the 30" the specs are pretty simple:
AUW = 175 grams
ws 30"
Total wing area = 436 sq. inches
wing load = 0.40 grams / sq inch

motor hk 24 gram (Turnigy 2730 Brushless Motor 1500kv)
8-10 amp esc.
orange rx
1-5gram and 2-3.5gram servos
370ma 2s battery

It has some very interesting flight characteristics and we think it has some real potential. It is one of the few planes out there that easily will do clean, tight knife edge rudder loops and flies the same upside down as right side up.

I have also attached a Pdf of the basic plan we worked from if anyone wants to try to build one.

http://www.rcgroups.com/forums/showa...4&d=1363985916

Comments are welcome!
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Last edited by Andrew Radcliffe; Apr 04, 2016 at 02:48 PM.
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Old Apr 04, 2016, 02:11 PM
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I see you beat me to it !

Good start !
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Old Apr 04, 2016, 02:49 PM
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Originally Posted by birdofplay View Post
I see you beat me to it !

Good start !
And I have already made the correction to the reference.
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Old Apr 04, 2016, 03:08 PM
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I keep waiting for my 24 inch version to build itself, but I'm coming to the realization that is never going to happen so I better get crackin'.

Thanks for producing those cool videos guys.
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Old Apr 04, 2016, 04:04 PM
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Thanks S.Davy

I use a simple Mobius with it's "clip" ty wrapped to the bill of a Hat. HatCam !

I set the Mobius to narrow view so the wide angle edges do not reveal so much distortion.
I hate seeing the background and edges going all Pincushion like.

Then I use the free Moviemaker in Win7 et al and upload to Vimeo or youtube.

Best

Bob
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Old Apr 04, 2016, 05:11 PM
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Quote:
Originally Posted by S.Davy View Post
I keep waiting for my 24 inch version to build itself, but I'm coming to the realization that is never going to happen so I better get crackin'.

Thanks for producing those cool videos guys.
And you thank us the best by finishing that 24" version and posting the video so I can decide if I want to build one that size!.........

Actually, it sounds like it could be a lot of fun. What gear are you planning?
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Old Apr 04, 2016, 06:42 PM
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Save a tree fly a foamy
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Hi Andrew. I'll be setting the plane up with:

-Emax CF2805 1600kv Outrunner Brushless Motor spinning a GWS 8x4 prop
-HURC 10 Amp ESC with Linear BEC
-Thunderpower 325mah two cell battery
-One 5 g servo driving the ailerons and two 3.5 g servos for the elevator and rudder
-Castle creations/ Berg 4 channel receiver

Note that the motor is way overkill but the cool thing is if I plug in 3 cells I'll be able to launch this little gem into orbit.
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Old Apr 04, 2016, 08:13 PM
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too much is NEVER enough !! :-)
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Old Apr 04, 2016, 09:54 PM
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Quote:
Originally Posted by S.Davy View Post
Hi Andrew. I'll be setting the plane up with:

-Emax CF2805 1600kv Outrunner Brushless Motor spinning a GWS 8x4 prop
-HURC 10 Amp ESC with Linear BEC
-Thunderpower 325mah two cell battery
-One 5 g servo driving the ailerons and two 3.5 g servos for the elevator and rudder
-Castle creations/ Berg 4 channel receiver

Note that the motor is way overkill but the cool thing is if I plug in 3 cells I'll be able to launch this little gem into orbit.
WOW, that is enough power for a 30" to 34" version, It will end up in orbit!
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Old Apr 05, 2016, 07:01 AM
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Kinda like building a HOT Powerful car , but only intend to cruise the blvd.
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Old Apr 05, 2016, 02:53 PM
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Save a tree fly a foamy
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Turned out to be an easy build. The time consuming part was doing the layout, as I don't have a printer, thus had to take measurements off my lap-top screen.

Anyway, I'm sorta stuck now since I don't have the receiver here in order to center the servos before final assembly. No big deal as it is way too windy here to do a first flight.

In the photo below the fuselage looks much longer than the wing, it's an illusion, the fuse is 24 inches from the front of the motor to the tip of the tail.
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Old Apr 05, 2016, 04:09 PM
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You're almost there !

I use Lemon Recievers form Taiwan. they are DSM2 or DSMX smart and
for foamys I just get the 6 channel $5.75 deal or get em 5 at a time.

Never had a bad on or even a glitch on..

I do have an old Spectrum 6000 rx that TOOK OUT my SR-71 today !

I "braced" my SSS with Kevlar Thread instead of CF sticks.
I sewed it in place and hit the Thru's with Hotmelt.

Good luck with th e rest of the build.

Bob
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Old Apr 05, 2016, 04:43 PM
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Save a tree fly a foamy
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Quote:
Originally Posted by birdofplay View Post
You're almost there !

I use Lemon Receivers from Taiwan. they are DSM2 or DSMX smart..
DS who, MX what? I am still on 72Mhz

Quote:
I do have an old Spectrum 6000 rx that TOOK OUT my SR-71 today !
Damn! Sorry to hear about that, Bob.
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Old Apr 06, 2016, 02:00 AM
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Got called into the shop today and grabbed the receiver while there, thus was able to finish the build. Plus the forecast looks good for a flight tomorrow.

Also came to a conclusion that I was likely to do significant damage upon landing without some sort of gear so I installed a mono wheel and a tiny tail skid arrangement.
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Old Apr 06, 2016, 07:39 AM
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My Big version flys so slow that if there is any wind it just plops with no roll/skid out
or flip over.

No amount of LG could have prevented this however ... ( see pic )

I had to pull CF out of the ground and it was stuck hard !
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