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M100S

Posted: 17 Mar 2015, 12:38
by RobbieB
First rig.
m100_first_rig.jpg

Re: M100S

Posted: 17 Mar 2015, 23:35
by alexis scott
Looking very very nice, I like it!!

Re: M100S

Posted: 19 Mar 2015, 08:48
by RobbieB
Thanks chaps; can't see getting much done in the next few weeks..................

Re: M100S

Posted: 20 Mar 2015, 07:23
by march
That's looking good Robbie, still in love with Morelli sailplanes ! ;) Marc

Re: M100S

Posted: 20 Mar 2015, 09:29
by RobbieB
Thanks Marc.

Yes, a little different and a bit of a challenge.

Re: M100S

Posted: 07 Apr 2015, 21:51
by RobbieB
incidence_pins.jpg
Incidence plates and pins fitted (sharp intake of breath from the rubber band boys!).

Time for sheeting.

Re: M100S

Posted: 18 Apr 2015, 22:10
by RobbieB
Sheeting started - 0.4mm ply ironed on - butt jointed over 20mm wide 0.4mm ply back straps.
sheeting_1.jpg
sheeting_2.jpg
The rib that each strap is glued to is reduced in depth by the thickness of the ply, top and bottom. Easily done with a piece of sandpaper glued to the face of a strip of 12 x 12mm pine long enough to bridge the two adjacent ribs.

Re: M100S

Posted: 19 Apr 2015, 08:47
by B Sharp
Nice Robbie! Just a thought based on experience - would it be worth while to double up on the LE ply thickness over the two or three ribs next to the fuselage? That's the place that the wing gets the most handling and .4 ply is quite thin.
Brian. :)

Re: M100S

Posted: 19 Apr 2015, 09:55
by RobbieB
Brian,

I know exactly what you mean but I've never had a problem with ply sheeting, even thin 0.4mm.; those chunky root ribs seem to take care of the 'launching rash' ok.

It's balsa sheeting cracking that I've suffered from in the past. I refurbished my old K8 some years ago and got the fright of my life when I stripped the covering off the wings - I don't know what was holding them together!

I think anything over 1:3.5 scale I would move up to 0.8mm ply.

I have been very aware of weight in the wings on this thing as those rotating brake assemblies are 510mm long (6 main rib bays) and are going to be heavy.

Re: M100S

Posted: 17 May 2015, 21:24
by RobbieB
Right, that's the hard bit done - laminating sheets of 0.8mm ply.

IMG_0065.jpg

Just got to turn 'em into 6 of these now:

IMG_0066.jpg

At least there's only 6 this time - and no holes.