Author Topic: Glider wing mod and reinforcement  (Read 16053 times)

skyhawk newbie

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Glider wing mod and reinforcement
« Reply #15 on: October 30, 2010, 11:05:23 AM »
Cheers Keith...

So Apoxying the wing halfs together with the Carbon Fiber rod's is OK...

The only reseaon I wana add the 2 aileron servos is because every time
I've had a hard landing ( lots,so much so the 1st skyhawk is now in bits)
I'm breaking the servo in the middle of the wing,haveing servo's (9g each) mounted on each wing half will stop this happening......


Sean
Too many to name
Gliders/Planes/EDF Jets.16 total...
cars.
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Happy Days

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Glider wing mod and reinforcement
« Reply #16 on: October 30, 2010, 16:23:41 PM »
Epoxy-ing the wing halves together would seem a good idea.

Before you stick them together assemble them on a table and look at the wing from the front, (or rear) you may well notice that they have ‘dihedral’. That means that the wing tips are higher than the middle of the wing. Or to put it another way, when viewed from the front or back the wing has a very flat V shape.
I tell you this so that when you glue the two halves together you must make sure that the wing maintains that dihedral angle. If you glue the wing together without it, the plane will be far harder to fly. :roll:  

Personally I wouldn’t bother with the carbon rods Sean, just glue the ‘male’ wing joiner into the ‘female’ (socket)  at the same time as you’re gluing the wing halves together. To fit the carbon tubes you’ll first have to cut out a grove in the wing, then place glue in it followed by the tube. This will all add weight.

Like-wise an extra aileron servo will add weight and in the world of flight, weight is the enemy! :evil:  :evil:  :evil:  
The more your model weighs the faster it will have to travel through the air to over come the effect of gravity, and fly. (Just like the airliner that takes you on your holidays. Before it can leave the runway it has to go faster and faster.)
Let’s think about landing your plane………….

To reduce the risk of damage at touch down the idea is to get the plane to fly as slowly as possible before it actually touches the ground. That’s pretty obvious isn’t it.

But your plane won’t be able to fly slowly, because it’ll be caring extra weight. …….so it’ll have to maintain a higher air speed. Savvy?
If you try to slow it down too much before putting it onto the ground it’s wing will “Stall” and the plane will just fall and hit the ground like a stone. (Ask me how I know :oops: )

What I’m trying to say is….”Keep your plane as light as possible!”


Oh, putting two aileron servos won’t stop either of them getting damaged.. But you will have the problem of how to fit them without either leaving them sticking out into the airflow creating turbulence and drag, or countersinking them into the foam of the wing, weakening the wing structure even more.

Having said all this, Model flying is only a hobby. So there is no law that say’s you can’t do what you want to…..and see what happens!!

Keith
Try not to run out of airspeed, altitude and ideas....... all at the same time.

skyhawk newbie

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Glider wing mod and reinforcement
« Reply #17 on: October 30, 2010, 19:59:34 PM »
Well Keith,
 
This is what I've done today...
 Glued some velcro onto the fuse..
50mm extensoin servo lead for aileron servo..


I didn't fit the Gold-n Rod's in the end as I found them
 too flexable for my liking.
but did fit a guild for the tail rods to run through



I went ahead and joined the wing halfs together,




 Carbon Fiber Rods fitted and apoxeed into place...
didn't do the twin servos as said it would only
weaken the wing and add extra weight
Velcro on LE/TE of wing
hopefully this will stop the wing moving some what on heavy landings
( will still be useing rubber bands as well)




I've still to fit the balsa aileron.....But that can wait till another day ...

Sean
Too many to name
Gliders/Planes/EDF Jets.16 total...
cars.
hpi Baja

skyhawk newbie

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Glider wing mod and reinforcement
« Reply #18 on: October 30, 2010, 21:35:50 PM »
Heres a Vid I've just put up on Youtube of my Up-Grades so far....


http://www.youtube.com/watch?v=3e4Pno8hyWI


Sean
Too many to name
Gliders/Planes/EDF Jets.16 total...
cars.
hpi Baja

skyhawk newbie

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Glider wing mod and reinforcement
« Reply #19 on: November 01, 2010, 17:23:43 PM »
Did some more Mods..
Fitted the Gold-n-Rods to the tail..

Mounted them in some balsa wood,to hold in place and
this will stop them flexing at the front..



Glued into place inside the fuse..




Mite remove the push rod guild as I don't think it looks right now with the Gold-n-Rods














Sean
Too many to name
Gliders/Planes/EDF Jets.16 total...
cars.
hpi Baja