Telemaster 70 Build Thread

Nice job! I personally like tailplanes with a lifting section, flats plate tails always seem a little crude, when my junior gets it's winter maintenance I'm going to build it a new set of tail feathers, it's the only model I have with a flat plate tail and my upcoming "next project" will also get the same.

Hi Paul

Smaller models seem to make more widespread use of flat plate tailplanes. But then to me at least, smaller models ( we're talking sub 30 inch span) seem to "flit" rather than fly. I'm not sure a flying tailplane would make a huge difference to a Junior 60, as it was basically designed as a free flight model which climbed from launch, and then transitioned into a (hopefully) winning glide. But hey, give it a go and see.....

Whether a tail plane produces positive or negative lift depends entirely on the direction of the airflow over it.
If the Cog of the plane is set so the tail plane actually produces positive lift then the only criteria for longitudinal stability is that it must create less lift with increasing air speed than the wing. It follows that a flat bottomed wing section tail plane is likely to be used with an under cambered section wing.

Yup, love my Perma-grits, the problem is, Mary's discovered them and they're now her method of choice before varnishing.

Did those cores come with the veneer on? You just attached the leading edge and trailing spar?

Hi Klip

Yes, the cores were supplied veneered. Billkits give you several options for foam wings. Normal white (polystyrene) foam, blue foam etc. You then specify whether you want servo or retract cut-outs, along with channels for servo wiring etc, with the relevant positioning etc. You supply the aerofoil section for the tip and root, together with any instructions regarding wing taper or sweepback etc. You also specify whether you want normal type veneer or balsa on your wing cores, along with balsa leading and trailing edges. It sounds more involved than it is. Bill does a great job, but then he has had a few decades worth of practice! His site is www.billkits.com So yes Klip, my cores just had standard type veneer applied. I stuck the leading and trailing edges on. I didn't see any point in paying extra for this when I knew I'd be able to manage it ok. Plus I'm a cheapskate. I took the light bulb out of my fridge to save money when I open the door.