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May 20, 2008, 12:05 PM
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dekan's Avatar

Simple Delta... a quick build "prop on the front" delta

This is my Simple Delta.
Its inspiration came from a thread on the Wattflyer... Delta and Flying Wings forum..

I was looking for a simple easy to build Delta
I also needed something that would make a lot less noise than the more common pusher or prop in a slot Delta designs, as I like to fly at a local park early in the mornings

The design that interested me seemed to be popular with a group of flyers in the Seattle area...of the several designs used, I picked on a triangular design with the point chopped off, as the roll rate looked very impressive.

You don't really need a plan for this one

WS is 20"
LE is 7" long
LE to TE (hinge line) is 14.25"
Elevons are 2" wide
Fus is 8.5x1.75"
Try 5" as a CG start point from LE, mine works ok at 6"
The Fin is 5" tall by 10.5" long.The Fin proper starts 8" from it's front and slopes back 2.5"
There are 3mmx.5mm CF flats on the leading edges....prevents damage from weeds! There is also a 3mmx.5mm CF spar

My plane has a 6mm floormate wing(cheap Depron subsitute) and a Fus and Fin from 10mm Epp Scrap. The feet/underfins are also made of 10mm Epp

The running gear is an Ele C20 2500kv on 5x3 prop with a 10A esc
I use a Thunder Power 730mA 3s lipo AUW 5.8oz
A BW would also be a good choice

Thanks Kosh and Seattle's flyers...

Goldguy's posts #371 & 467 provide additional info, covering his improved & tidied up SD
His Slofly SD info is to be found in post #1972 and 1980, Thanks for the help Frank

Chewy's Tiled plans are in Post #516.. Thanks to Box for tileing them
Another plan for the SD by Leebospeed Thanks Lee... post#538

More help from Aeronot " post 1086 has plans: One simple set of 22inch wingspan simple delta plans is at post 1076 good for windy days...
Fin: A simple Fin with an aft angle of 105 is at post 1073 extra links added to post 1076

FFF, alternative simple delta and counterbalanced elevons, Kosh's post post 1172 looks very nice for small spaces, slow flight"
Last edited by dekan; Feb 15, 2010 at 06:01 PM.
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May 20, 2008, 12:35 PM
Concept Builder
Vanish's Avatar
It's a cutie.
May 20, 2008, 02:24 PM
Registered User
martseger63's Avatar
Beauty in simplicity!
I like it! Maybe i'll build a somewhat larger version for TP 2408-21, 3s1000mah,9g hxt servis etc..
May 20, 2008, 02:29 PM
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dekan's Avatar
24" version should work ok
May 20, 2008, 03:25 PM
Sussex, UK
RobinBennett's Avatar
Cool, I bet that will be quite quick, but for a bigger, slower one I'd recommend adding a rudder for steering in high-alpha flight.
May 20, 2008, 03:47 PM
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dekan's Avatar
It is quite quick, looks about 70-80mph.

I don't need a rudder with the Ele, a 5" prop it isn't going to hover much...
Hi A isn't too bad considering.
Last edited by dekan; May 20, 2008 at 04:22 PM.
May 20, 2008, 04:55 PM
Look outside the Square
Boxhead's Avatar
I'm in.

B x
May 20, 2008, 04:59 PM
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dekan's Avatar
'Bout 20min build for you Box...
May 20, 2008, 05:12 PM
Look outside the Square
Boxhead's Avatar
20 min I'll give it a shot. Just have a couple of ELE C20's doing zip. Basic, Simple and really looks the Goods Dekan. " Good Show Old Man". I'll be head'n out shortly for a fly so looks like I'll be do'in a bit of cutting later on.

B x
May 20, 2008, 05:29 PM
D'oh.. Dumb Left Thumb
dekan's Avatar
Box, it rolls like a drill...3ft loops....You will love it! right up your alley....just keep it light.

Blowing a gale here.. hoping its going to be calmer tomorrow.
May 20, 2008, 05:38 PM
Registered User
I think that you perhaps have inspired me to finish this one.

After trying this one of mine, I think yours will be next. I really like its lines and simplicity. Mine is a shameless pilfering of other designs of basically the Pribos for the airfoil, the hyperflea for shape shrunk to 20" WS and 17" nose to tips of elevons, and a dart fuse and vert stab. I too want a tractor for silent flight. The rudder and wheels will allow for control on the ground as well as ROG. Yours will be for a knock around plane to use at the farm. I don't have anything without wheels to land in tall grass. I think that yours will be the ticket. Maybe I will just sell my two HF cores. It is so much fun to make something out of flat plate foam. I am amazed by the full fuse planes, but these are so simple. I was never sure about the CG on my design but will play around with the suggestion on yours as well.
May 21, 2008, 12:51 AM
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dekan's Avatar
Tymbe,Note the word "Simple"
IMO any kind of proper wing section is off limits for this type of plane!

KF qualifys though!
May 21, 2008, 02:12 AM
Look outside the Square
Boxhead's Avatar
My middle Name is Simple ....Just ask the misses. Just started to cut it out but just come up from the Dungeon to check the picture. I'm just going off your measurements and Yep its simple Dekan.

Mate its blow'n and raining here at the moment. Good cutting weather. So back to it.

B x
May 21, 2008, 03:05 AM
D'oh.. Dumb Left Thumb
dekan's Avatar
Keep at it Box... but make a space on the corner of the work space for the most important item...a tinnie of the amber necter..

IMO very few good planes are made without a certain amount of alcohol
May 21, 2008, 03:22 AM
My plans are in my blog
Rusty-Gunn's Avatar
Good luck on your new project guys, heres wishing you the best on your flights.

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