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Old Oct 15, 2002, 12:23 PM
punkin is offline
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first scratch built!! no name, no graphics yet


here is my first scratch built. i built it with only a crude knowledge of design basics, based roughly on my GWS Zero. i wanted something lighter and more stable.

the result is this prototype: fuse is 2mil coroplast, wing is walmart 'sturdyboard', wingspan is 30", GWS 370 type 'C' motor/gearbox (same as Zero), 8 cell 720 NiMH batteries.

i am VERY pleased with the results. it loops, rolls (my entire bag of tricks at the moment), respectable vertical. i have taken 4 first-timers up on a 'buddy box', all have done well. i plan to add rudder control and finally learn to fly (BTW anybody recommend a good 'aerobatics basics' book/website?)

if anybody is interested in the specs, i'll post everything you need.

comments/suggestions are welcome!
-scott
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Old Oct 15, 2002, 01:02 PM
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That looks great! Now you are obligated to draw out some plans and post them for everybody LOL!

Eddie
Old Oct 15, 2002, 01:23 PM
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looks great, it kinda reminds me of a foam spad plane

http://www.spadtothebone.com

ryan d.
Old Oct 15, 2002, 01:41 PM
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ryan- it shouldn't suprise you that i was a spad flyer for a summer. love the simplicity/efficient design, hate the nitro mess. i had many planes in mind while building--the switchback, spads and especially a 'flat spad' i saw a post about.
it's been a while since i've been to your site--WOW! i need to catch up.
Old Oct 15, 2002, 01:43 PM
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Which prop are you running? What is the flight duration?



Great looking plane.
Old Oct 15, 2002, 01:45 PM
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I'm interested in the specs. It looks like a nice little flyer.

Is the GWS 370 motor similar in size and power to the speed 400?
Old Oct 15, 2002, 01:48 PM
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wow i really like your design also. could ya give us a few specs
like fuse length.wing cord ? thanks...
Old Oct 15, 2002, 02:11 PM
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Speaking of SPAD .... who is going to be the first person here to build an electric FNS ( Friday Night Special ) from foam. For those of you who don't know a FNS is a rudder/elevator combat plane that looks totally sweet when made from coroplast ... I know it would rule made from fan fold.

Punkin - draw out some quick plans for us ... won't take you but a few minutes!

Eddie
Old Oct 15, 2002, 03:37 PM
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i'm really glad for the interest. i have seen some of your amazingly complex foam designs and didn't know if there would be any interest in my 'basic' design.

so here's some numbers:
30" wingspan, 8 1/4" chord, 7" at tips
ailerons are 1 1/4" tapered to 1" at tips (more than enough area!)
overall fuse length (including elevator) 24"
horiz stab is 5"x12" (cut to shape) including 1 1/4" elevator
vert stab is 4 1/2" at base x 4 1/2" tall (could be bigger IMHO)

i'm using 8 720 NiMH cells, the 9x7 3 blade prop (i want to try the 10x8 but LHS is always out), Naro +BB servos, 15A ESC, Naro Rx,
motor is the EPS 300 'C' 64/12 ratio (speed 300 i guess, right?)

the fuse and horiz stab are cut from one piece of coro. i dimensioned it to fit the battery pack (4cells stacked). inner dimensions are 1 5/8" x 7/8" which is a TIGHT fit. the flutes on the coro are running perpendicular to the fuse length (running flutes lenghtwise makes it difficult to get a square fuse, and also makes it weak in the 'twisting' direction).

for the wing, i made the bottom layer 7" straight across, then the top layer is 8 1/4" (tapered after glueing)--kind of backwards i think. maybe i should have cut the top layer 7" so the flat bottom piece is the overhang. i want to try this out with a coro bottom & foam upper (combat!!). the spar is a 3/8" (or maybe 1/2" i'll have to check) foam piece with a CF stiffener. the wing is covered with packing tape.

other details: mostly probond glue, wheel is foam with milk jug outter layers and a control rod guide tube for an axle hole. ESC and Rx are inside the fuse. i used a CF rod (6" long) for a stiffener on the rear (running lengthwise to the fuse--glued to the fuse and horiz stab) and another piano wire stiffener (~6" long) inside the horiz stab (running perpendicular to the fuse).

to mount the vert stab to the horiz, i cut a slot in the horiz stab and inserted the vert piece about 3/8" inside and bent it 90deg to glue to the horiz piece. i'll have to post a pic of this--kind of confusing to describe. if you only make the bend one direction, the vert stab will lean, so i made 'tabs' that i bent one direction then the other.

here are some bad pics--sorry for the poor quality.
Old Oct 15, 2002, 03:56 PM
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thanks for the quick responce with the specs.. i will build one asap....
Old Oct 15, 2002, 05:17 PM
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punkin

Hey the spad site is not my site, but i do go there often, I love the simple designs of the spad stuff, I currently fly the debonair (slimer) I love it, I like both nitro and electric, there's just something about kicking the nitro engine on that i like, anyway your plane looks great, I might try to build something similar, one of these days.

take care

ryan d.
Old Oct 15, 2002, 07:39 PM
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If you are looking for some basic aerobatics, check this site out.
Aimed at slopers but you will find most of it applicable to what you want.


http://homepages.enterprise.net/chasg/page6.htm
Old Oct 15, 2002, 08:11 PM
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Who says SPADs are only for gassers? You just gotta propel them correctly. I use speed 600's and 05's and a gearbox.
Here is my Dogfighter, sorta like the FNS. Flies great!

Dave...


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