Winter build

ok it looks a little rough and it's not even half built but there's at least something to show, I didn't mention before but it's actually a one piece wing, no building separate panels then joining them, I've discovered a long tapering multi angled spar isn't the easiest thing to work with! the centre panels taper on the top surface only but the out panels taper both sides....and have a little washout and it's all undercambered!
glad the interlocking design allows it to be dry fitted before committing to the glue.
when it's finished I'll take some close ups to show the details a little better.

Spotty chickens aren't the best building companions!

What sort of problems were you having with the spar Paul?

supertigrefan wrote: What sort of problems were you having with the spar Paul?

Main problem is knocking it while working on the other end, took a age to make!

I'd be interested in the process when you have the time?

I think Paul did mention that it was a composite spar, as recommended by Andy Sephton. The way I see it, if you're going to have a twist in the spar to get your washout, the only way to be sure of its integrity is to build up the spar (ie composite). I'm also very interested to know how you did it Paul.

Firstly let me mention the plan doesn't call for washout but I've incorporated it after witnessing the effect of it with my caprice glider ( once the motor stops it is after all a glider!) The caprice would, got made a stupid offer for it so I've now sold It, fly at ridiculously slow air speed.
The way I've done it is to attach the ribs with the spar "in the air" before propping the inner panel up at the appropriate angle and packing the root rib of the tip (at the spar only) to 3/16 , this allowed the tip of the spar to just touch the board, I then moistened the spar and attached the trailing edge, again that's notched into the ribs, with 3/32 packing under the t/e of the last rib and it's l/e on the board it allowed the spar to gently twist, with the laminated leading edge glued and pinned into place it effectively locks in the twist.
Apparently when flown as free flight it was quite common to incorporate wash out on one panel and wash IN on the other to encourage the model to climb in a spiral!

Impressive ! That is way beyond my 'patience level'. I doff my cap to you sir !

Well I've finally finished the wing, just need a dry day so I can take it out back for a good sanding!

Well the dry day arrived along with the spare time so I got the wing sanded, couple of missed gussets to add then it's radio interference fitting and covering time!

Now that is a thing of beauty!

Well with all the broken buggys and boats fixed finally found the time to do a bit more to the slicker, servos tested and installed, won't be able to get to them once it's covered so I've gone for some good quality ones.
Had a change of mind and using pull/pull rather than the planned snakes, using 12lb braid, no stretch at all but it can cut so I've ran it all through ptfe bushes glued to the formers.

a bit fiddly but got there in the end!
Also laid up some fibreglass flat stock, bits on the left are for the control horns, bit on the right is for a hatch to allow access to the rx and battery, will fit in the appeture below the rudder servo shown in the first photo, needs a hingeing and a catch.

finally found the time to start covering, due to current restrictions I couldn't get any polyester silk so I've gone with nylon, the weave is more open and will probably need a little more dope to seal.

Only ever used nylon once before maybe 25-30 years ago so it's a bit of learning curve as it behaves differently to.my normal material, decided to iron it on dry rather than dopping it on wet.
slow work ( 7 hours) but the wing is now covered and ready for a coat of dope.

I'll sand off any hairy bits once it's sealed..

Is that Ripstop nylon Paul?
Did you search Ebay for dress lining? That's usually polyester nylon and comes in different colours.

I'm far too impatient to wait for something to come through the post! Yes it is rip stop sold under the Perkins banner, strong as f##k but it should be considering the cost...£16.99 for 2 square metres!
did get a bit discount