Anyone got tips on how to bulid a glider

[Junwei]

eh ming hui got meet up nv jio me go learn as well.. haha.. wat demo on sat? can i join??

hey joe i am not covering.. i am jus tring to make the side of the wings curve up i forgot how to put in pics to here again liao.. sorry.. but u noe the side of the wings tt is curved up? ya tt part...

Junwei

[aloev]

its this saturday at temesek poly at 11...joe yap is conducting a glider buliding workshop...

ok...now i jio u...u want to go or not is up to you...

[jon-AMIG]

Hi Joe. I want to do a built-up wing for the glider after you have shown us How easy it can be done.

So how do you construct a schueman planform wing?

[joe yap]

The basic construction is the same. The difference is that you build the separate panels, but leave the centre ribs out first, which are in the centre of 2 adjacent panels. Make 2 dihedral braces out of plywood, glue them to 1 panel first. Next dry fit the other panel and probe it to get the dihedral angle, and glue the other side of the braces to the panel. Only then, you'll glue down the centre ribs.

Do you remember seeing how my built-up glider wings are done?

[jon-AMIG]

Ya..I do remember how you did it..But its the designing of the schueman planform that Im not sure of. Like what chords should I give on each taper edge & the length in between the chord lines.

[joe yap]

It is very difficult to determine the exact elliptical curve without wind tunnel testing. However, you can always start off by drawing a nice curve first, then later break it down by a series of straight line. The important point to note it that the tip chord is preferbly not less than half of the root chord, excluding the wing tip.

[jon-AMIG]

Oh..I see.. So Joe, you use Autocad to plan & print your ribs right.. How do you do it?

[joe yap]

I drew the plan of the wing, and the position of each individual rib. I duplicate the basic airfoil pattern to the number of ribs required. After measuring individual rib length, I scaled each rib down to the actual rib size. From there, I offset the surface for wing sheeting, draw the slots for spars and accommodate for LE and TE.

[jon-AMIG]

We have finished building the wing & now trying finish it up with the fuselage & tail mounting before the competition Tml!

K..Thanks Joe!

[joe yap]

Good job n good luck!

[Junwei]

i tried throwing the glider in sch jus now.. and guess what.. it flew up, up, up and dive all the way.. now its back to sq one.. totalli demorallised.. haiz...

Junwei

[joe yap]

That's why during the workshop, I have been emphasizing stability should come before performance. The plane must first proven flyable, before you can even talk about performance.

[aloev]

joe...u noe that glider u bulit???

i tried throwing it in skool....

it flew over 60 feet into slight head wind....

it only stop flying becuase i ran out of field to fly and hit a wall

but alls good....

[jon-AMIG]

Hey, aloev. Hopefully u're not thinking of using that glider for the competition huh. Unfair grounds! Hahaah

Attached is the glider my team built in 3days! Hopefully, it'll be our winning Glider! Hahahaa..

[joe yap]

Hi Minghui,

Wow! Glad that it still flies well. In fact better than I 've expected.

Jon,

Looks good and neat! Best of luck!