<span style="font-size: medium;"><span style="font-family: 'Times New Roman';">hey hello there i am making my first plane need help.
have made one plan but not sure if it will working or not

i am using material is Coro sheets.
also need building tech. of wing.
the design is for monoplane plane.
I dont know how to make light weight spar &amp; what material to use (which is easily available)
or how to make coro wing without spar.
</span></span><br type="_moz" />

Hi Rajesh!  Sounds like you're ready to do some reading on the wonderful world of SPADs!  A good resource is www.spadworld.net.  Then RCU has a SPAD section with a lot of info:  http://www.rcuniverse.com/forum/forumid_178/tt.htm  RCGroups also has a good SPAD section:  http://www.rcgroups.com/spad-simple-...e-designs-176/<div>
</div><div>Looking at your specs, I doubt seriously you're going to be able to get a plane of that size off the ground with a .45 engine.  You're closer to the size of the Ultra Spadstick which most guys fly with a 45cc gas engine.  Check out the Debonair:  http://www.spadtothebone.org/PDF/Debonair.pdf  It is an easy to build .40 size trainer and the instructions on the web site are great.  Hope this info is some help.  Welcome to the addiction! </div>

Are those inches or centimeters?  Coroplast is light but a model of 80" span w/16" cord won't weigh 21 oz.  I think you have to add 100 or more ounces to your estimated weight.   

I fly two models of that size - one on a 26cc and the other a 34cc (1.20 to 1.60 equivalent engines).  A .45 would hardly improve the free-flight glide.  They weigh 192 oz and 232 oz dry!

A SPAD Debonair was my first plane. It wasn't a good a flyer as the typical balsa wood trainer, but it was good enough for a beginner to have a good time with. If those are the materials you have to work with the Debonair built per the plans will be a nice flyer for you. The one suggestion I'll make for changes is to do the RNAF wing that the Das Spad Stick uses. It has 2mm coro on the top instead of 4mm, which saves you some weight.

Now all of that said, if you are going to be buying your materials new, you might consider a .40 size balsa ARF instead. The cost won't be much different in the end, and you'll have a better flyer.

hi<div>but m making it for electric</div><div>thats why i want to make it light weight.
Anybody have plan for 100/80 cm wingspan electric plane.
PDF or DXF will also work.
</div>

Ok. You're going about this backwards. Do you already have the power system? Do you have a budget worked out for how much you can spend? You're going to need, at a minimum, a good airplane design with the right power and servo recommendations, a reliable transmitter and receiver, a set of servos, the right motor and speed controller, the right battery for your power system, and a charger for your battery. If you're good with all of that and are now ready to build your airframe, there are some plans websites we can direct you to for some reliable designs.

Hmm the traditional Spad making materials and Lightweight too? Sorry but sure seems like no such thing to me.


John

True, but you CAN make a decent flying RC airplane pretty easily with the plans that are published at the SPAD websites. The biggest obstacle is learning how to glue the coroplast, but that just takes a little bit of practice.
All the information for success is at the SPAD forum.
The latest design I've seen was for a .15 powered coroplast model...IIRC it is called, "The Gnat".
Very clever and economical use of materials.

Good morning CP

I really don,t have anything aginst Spads and some of them can be fun and economical. I have flown and taught one gentleman with a Debonair and I have built I think six of these little 'Combat Spads' for the fellows from simple instructions at the Spad site. Had great fun with them locally and even had some simple contests with another club for a while.

Anyway to the point while yes of course you can learn with certain Spad designs but since this is the beginers forum and the original poster is in an area of the world where traditional spad materials may be difficult to obtain and even mentors more difficult. So sorry but is my opinion he would better of starting with a more traditional airplane and one proven since he seems to want to also design his own and I also beleve that is never a good combination.

John

John, how about the "Slow Stick"..?
It's technically a SPAD and I've never seen any traditional RC trainer in this size range any easier [or slower] to fly.
It doesn't use coroplast for the wing...it looks more like the thin sheet styrofoam that you see at the butcher shop. I don't know how the flimsy wing is made stiffer, probably small diameter carbon or fiberglass tube or round stock.
The problem with these planes is they are so easy to fly that they are pretty boring once you have mastered it's control, but for someone who is just learning, [possibly someone with experience on a flight simulator]...the Slow Stick would be a good 1st plane in my opinion.

Thanks all ASA my design get ready will post pics.
thanks for all ur help.

<br type="_moz" />