Milli Kema Series 2 (oz11763)
About this Plan
Milli Kema Series 2. HLG. A 60 inch hand launch glider.
Direct submission to Outerzone.
Update 01/12/2019: Added article, thanks to RFJ.
Quote: "Milli Kema. Fetch the liniment and get your throwing arm warmed up for Keith Humber's 60 in HLG!
The idea for 'Milli Kema Series 2' was born out of a phone conversation with the editor when he casually mentioned that he could do with another hand launch glider design like 'Milli Kema'. So why not take the original design a further step using the original design concept as a base?
Aerodynamically the Series 2 is very similar ie a lightweight, simple to build but efficient soarer. Constructionally I have changed the pod/boom layout; the original could, in a heavy arrival, break at the pod junction hence Mk2 has a conventional fuselage with 1mm ply doublers at the tailplane seat. The wing is virtually identical to 'Milli Kema' except the tips which are reshaped. They look a bit prettier and could, I suppose, be a bit more efficient. I also think they help the model to turn a bit tighter close to the ground (though that is really pure imagination).
You could, I think, use a polyhedral wing which would keep the tips away from the ground when you have one of those untidy arrivals. However, I digress; flyingwise she is really a very nice little fun machine slightly better I think than MK1 and she seems to hang up a little better on light lift though I hasten to add the original wasn't at all bad either. I must mention that I had a super letter from Oz, New South Wales to be exact, from David Thomas extolling the virtues of 'MK 1' with an 049 on the nose where he reckons that all the Lismore club flew her including the pet dogs and, dare I say it, kangaroos! Nice one Dave. Thanks for the letter. Anyway back to the construction of 'MK Series 2' which will, I assure you, be short and sweet.
Fuselage: Cut two basic fuselage sides from 1/8 balsa sheet, cut out formers from 1/8in ply and glue the tail doubler (1mm ply) onto the sides checking they are handed. Frame up sides onto F1, F2 using epoxy glue on the 1/4 in sheet underpans and laminate up the rebated nose block. Glue the block into position checking alignment is OK (make tail group from 1/8 sheet and hinge the tail with mylar, magic tape or similar). Pull in the rear fuselage sides, glue in the 1/4 in sheet tail seat, check alignment then glue on the tailplane. Make up pushrods from 18 swg bound onto 1/8 birch dowel, position pushrods in fuselage and connect to tail horns. Sheet top and bottom of rear fuselage with 3/32 sheet, shape with razor plane, sandpaper and that's the fuselage!
Wings: Wings are constructed flat on the board laid over the lower wing spar and joined in the centre with 1/8 ply dihedral braces (epoxied). All the ribs are 1/16 sheet as mentioned glued over the drawing onto the lower 3/16 x 3/16 hard balsa lower spar. Make up the 1/16 balsa built-up trailing edge, chamfer the rear joint to obtain dihedral using epoxy for joint then finally sheet the leading edge with 1/16 sheet top and bottom and cap the rear rib portions with 1/16 x 3/16 strips. Carve and sand to faired shape and that's the wing. The canopy is made from soft block or built up with 3/8 sheet. Finally I covered the wings with Solarfilm, ditto the tail group. The fuselage was covered with Polytex - keep the paint job as sparing as possible and you should come out about 19 to 20 oz all up (with some lead in the nose to boot).
Flying: The flying side is, as I previously mentioned, not bad at all - in fact, really quite easy. Trim out with short hand launches and, when satisfied I suggest you use a light 20m bungee to get the feel of the model before attempting to dislocate your shoulders with a hard, high hand launch. Seriously, do go careful and build up to that sort of thing in stages. In fact I always use the bungee or fly the model off the slope but then I am a little bit long in the tooth for HL gliding and I find that 20m is just about right! You still have to work quite a bit to get that elusive thermal and when you do hook one it is very pleasing.
I hope you will like this latest 'Milli Kema' and enjoy flying her as much as I have done. So high launches, low thermals and super flying with happy landings!"
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