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Slingsby T.50 Skylark 4**

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B Sharp
Posts: 697
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Slingsby T.50 Skylark 4**

Post by B Sharp »

I felt that I was in dire need of a new balsa bashing session and was looking around for a subject I hadn’t tackled before. I wasn’t up for a large and heavy model at present; something around 4 metres and under 6 kilos, but still large enough for a good performance. I chanced upon a 1:5 scale model of the Skylark 4 by Mike Trew which seemed to fit the bill. I also decided to do this build log as I hadn’t done one for a while and I find that it helps me keep the build moving along.
Having received the plans I decided to make a few changes (as usual). These plans were drawn nearly 30 years ago and radio and techniques have moved on since then. Mike used a wing section which is not unlike the full size NACA63-620 which works out at 22% thick on the plan. I felt that using this would give a fairly narrow performance envelope so I am changing it to HQ3.5/16 at the root transitioning to HQ3.5/14 on the centre section. The tips will transition further to HQ2.5/12 at the wing tip. I will modify the wing hold-down arrangement and use Chris William’s sliding square tube method for actuating the elevator. The ailerons will have servos way out on the tip panels rather than long pushrods and bellcranks and I will install electric brakes for simplicity.
I have even picked possible schemes for the finished model and they should appear below.
Brian. :) :) :)
Slingsby T50 Skylark.pdf
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