RC India

Hi Everybody,

                  Last week I crashed my AXN Floater cos of one technical issue and broke lots of it. So I was thinking to build one pusher using coro so that even when it crashes i can throw away the air frame & build a new one. Any one have any plans using coro for a pusher which should have ailerons too. Big enough like multiplex easy star.

Come on people give some ideas. where are all the senior

Here is one i found using depron. may be i can put some powerful system to pull it.

http://www.rcgroups.com/forums/showthread.php?t=922465

Hi Azhaguvel,

                   you can refer to these web sites for treasure of plans and every thing you want to know about Spads.

1. http://spadworld.net/forum/

2.http://spadslopers.desertsites.net/plans.htm

3.http://www.spadtothebone.com

Hope this helps.

Thanks Akshay, But I am looking for a pusher model does Spads has such

between here is a another link of the exact models i am looking for but i couldn't download it. may be they removed the link
http://www.scratchrc.com/RC-Pusher-Plane-Single%20Tail.html

I think you need these:

http://wn.com/Spad__Corro_Beagle_planePusher_Glider

http://www.rcuniverse.com/forum/m_1446756/anchors_1446756/mpage_1/key_/anchor/tm.htm#1446756

http://www.rcuniverse.com/forum/m_1446756/anchors_1446756/mpage_1/key_/anchor/tm.htm#1446756

The links posted by me earlier have treasure of Simple Plastic Airplane Designs,  just go through them.

Here are few of my ideas

1. I am thinking of using kf3 airfoil for wing which has nice lift.
2. use a 3mm coro as the base with aluminium tubes as chord support for the wing then use EP sheets(used for packing) above it to achieve airfoil shapes.
3. use aluminium tube for the tail

I need some basic help

1. What should be the Wing span & chord length
2. Is kf3 ok for the plan or suggest a foil.
3. how much back the horizonal & vertical stab needs to be. Also of what size?
4. what should be the angle of attack of the wing
5. what should be the wing style(dihedral, polyhedral..??)

Here is a good plan
http://spadslopers.desertsites.net/SPAD2K/index.html
To make it a pusher, you can put a pylon mount on it or make it twin boom.

Azhagu
go with a spad, so many are there, all flies well with Kline Fogleman 3 well, spad is not a bad way to go. trust me. i made one mid straight winger using coke bottle as fuse (Inspired by the video on the forum), good flier.

Since you want a Pusher configuration similar to the AXN floater, I suggest you try a model called "Tuffy", it has a glider configuration and good platform for installing cameras.

My desi version was built with high-density theromcol, but you could improvise with  coroplast: www.rcindia.org/self-designed-diy-and-college-projects/tuffy-pusher-prop-model/ (http://www.rcindia.org/self-designed-diy-and-college-projects/tuffy-pusher-prop-model/)
(http://www.rcindia.org/index.php?action=dlattach;topic=2713.0;attach=622287;image)


Original plans: http://www.rcgroups.com/forums/showthread.php?t=1000670 (http://www.rcgroups.com/forums/showthread.php?t=1000670)

@augustinev
SPAD? You mean pullers?

@sethji
Exactly what i am looking for. But I doubt whether i will be able to keep it under 500 gms using coro. Will try that this week end & see the weight then will use a appropriate power system.

Here is another one of same kind
http://www.stenulson.net/rcflight/slimbeag.htm#HOTDOG WING

Hi azhaguvel,
                 'SPAD' (Simple Plastic Airplane Designs) .

yes SPAD' is 'Simple Plastic Airplane Designs' and as you have asked for Coro designs I just shared with you SPAD links.
As SPADs are generally made from Corrugated plastic sheets which are easily available every where.

see there are many pusher designs in my post #4. Or you can improvise to make, some of the pusher designs in coro, as Sethji has indicated in his post.

SPAD are the ones constructed using coro right? I am looking for a SPAD pusher with ailerons.

HI Augustinev,
                   I dreamed of this plane last night. I could not find link for the same. Please share the same.

Y can't u take a foamy pusher plan and build it using coro? Not seen a Spad pusher yet..

Yes Krish thats is what I am trying to do. The problem is I have no idea about aerodynamics. Think of its advantage using coro I can crash it & still smile. Can give the controls to a completely new guy without worrying with the confidence 'All i am going to loose is just the frame I can build it again. very cheap!!'

I am thinking of building this model
http://www.stenulson.net/rcflight/slimbeag.htm

the new one with kf3

The design in my mind

wing with coro as base(aluminium rod for support) & EP for the kfm3 shape
fuselage partly with coro & then EP for holding battery
tail boom is aluminium rod again with coro stabilizers

I have seen some..
http://www.rcindia.org/electric-planes/pusher-trainer-for-beginners-bgnr/msg40197/#msg40197

Dont think so much, just make a wing according to a plan and use some imagination when making the fuse.
Here's one i saw on Sai's youtube channel.
http://www.youtube.com/watch?v=kIiJ-Nfwcxk

My point is, don't wait for a exact plan, just pick up bits and pieces from different sources and start building  :thumbsup:

 :headscratch:

Vel just try the plane given by SLS..Would be a stable one..

Ya sunlikestar thats what I am doing, I just wanna know the dimentions. I cant use a 2mm stabilizer on a 48" wing :P. I just want to know the ideas(wing size, angle, stabilizer size, fuse size & dihedral) from the experts here who has already done similar stuff. I also dropped PM to sai no updates yet. Anyways i got some idea from the links akshay & others has posted(thanks everybody :)). Will start building this weekend

Have you give a thought to the SPAD2K plan i posted before, it has all the dimensions. It says untested plan, but people have actually build that one.

but it doesn't have ailerons. I will go for its dimentions except the wing

Another one which seems to fit my need
http://www.foamflyer.info/plane.html

Here is the plan I have in mind.
comments on the dimention is most welcomed

Here is my prototype I 42" Wingspan with kFm3 Airfoil(Well almost  :P , by mistake i had a extra little small step) for glide test. It glided very well.

http://www.youtube.com/watch?v=bVas4iHjUi8

Oh yes, 'Watch out for that coconut Treeeee !!!!!!'  :giggle: .

nice :thumbsup: i love pvc and coro :)

I don't understand why folks would want to put a step when they can just extend the top surface all the way for a neat clark-y shape.

for the fun of trying new things i guess :iagree:

HEHEHE. Not for fun SLS. That the speciality of kFm easy to contruct and also more efficient(based on your application) then the normal ones.

Azhagu
Hope our discussion was of some help

I don't think Kfm are not more efficient than conventional airfoil, they are comparable only to flat plate or UC airfoil at best.
Easy to construct and weight saving  :iagree:

Ps: I just love the "i agree" smily :)

@SLS
 
        yes  :iagree:

@Augustinev

Ya augustinev it was very helpful.thanks :D. I am re-designing the plan. I am little worried about sticking the horizontal stabilizers on the top of vertical stabilizers. Cos now I have to stick the vertical stabilizer, vertical to both the boom & the horizontal stabiliser. I am going to try with kFm2 for my prototype II :P . After it works fine then i will try kFm3.

KFm3 easy to build? What is so difficult the way I construct mine?

The lower surface is a flat plate, the spar runs across the half span of the wing at approx 30% from LE, the upper surface is joined first at the spar, then at the LE and finally at TE.
In this construction, the small foam bit at the TE is just a 1/2 inch width to help the two halves to be glued together.

Personally, I feel this offers a much smoother curve for the aerofoil than the KFm wing

Pankaj

nice one Pankaj. I would construct one if i get bio-foam here in trivandrum. Can this be done using coro also. Wont it will add more to the weight?

See if you look at the KFm3 design, with all the steps involved, the material needed would probably be the same. While I do not have much experience with coro, but it might be a good idea to slice the inner layer of coro at appropriate length and after giving the bend, put a dash of super glue to stick the tear (if you understand what I mean).

@ SLS
That is not PVC, Its a aluminium tube. sounds heavy na. Ya it was a test for how heavy the plane can lift and glide. Also the tail is just inserted there on the tube so that i can change the tail dimentions & check for stability.

@pankaj
I didn't get what you are saying. Are you saying to split the coro at the flutes or insert coro strips of required length vertically inbetween two layers to get the airfoil shape?

Split the flute or bend the upper coro sheet a bit to get the shape. If you split, then be sure to touch up with CA. Also remember the flat plat at the bottom would provide the necessary strength.

looks good to me
best of luck :thumbsup: :goodjob: