Twin Star by Multiplex
20 Jan 08 - Sold.
|N° of launches / Time||29||4 hour 47 mins||Note: not all flights recorded|
|Wingspan||55.9 "||1.42 m|
|Wing Area||620 in²||40.0 dm²|
|Flying Weight||2 lb. 15½ oz||1.35 kg|
|Wing Loading||11.0 oz/ft²||33.7 g/dm²|
|Wing Cube Loading||5.3 - Between Glider & Trainer (a real floater)|
|Motor||2 x Mulitplex Permax 400 6V, wired in parallel|
|Propeller||2 x Graupner CAM Speed 14cm x 11cm (5.5" x 4.3")|
|Batteries||8 Sanyo N-1700-SCRC or 8 Panasonic 2000 cells|
|Speed Controller||RC Line MSC-50B - 50A - 5 to 10 cells - BEC & Brake|
|Receiver||Hitec HFD-07RA - 7ch - PPM - Dual Conversion - 35MHz|
|Servos||Ailerons - 2 x Union Micro UM-9G|
|Elevator - Hitec HS-81MG|
|Rudder - Hitec HS-81MG|
|Static motor parameters||8 N-1700SCRC cells gives 14000 RPM (average) @ 8.2V, 23.0A, estimated 64W/lb.|
|Flight performance||Flies really well with plenty of power considering it uses 2 standard Speed 400 motors. Climb at a comfortable speed is approx. 15°. Loops and rolls are easily possible from level flight and inverted requires only a small elevator input. A really nice model that I'd recommend to anyone - an ideal electric trainer. Will even take-off (run off ground) from snow without assistance.|
20 Jan 08 - A friend asked to buy the Twin Star and I agreed as I could do with reducing the number of aircraft I have to make room for new projects.
11 Jan 03 - I have just swapped the Webra Nano S6 receiver for a Hitec HFD-07RA Dual conversion set as I wanted the Webra receiver for the AFF Alpha Jet.
22 Jun 01 - I have fitted the HS-81MGs to elevator and rudder and the control response is much improved. I also changed the JR 9ch receiver for the Webra 6ch unit, which offsets some of the weight increase due to the servos. Due to a Günther propeller flying off, I have fitted Graupner CAM Speed 14cm x 11cm (5.5" x 4.3") propeller with suitable adapters. The Graupner propellers don't seem to have changed the flight performance but won't fly off.
28 Dec 00 - We had about 1/4" (6mm) of snow last night & I couldn't resist taking this model out for some fun. I decided that it would probably run off snow without assistance, and I was right. The first take-off was a little screwy, but it made it, with subsequent take-offs being much better. On one landing I caught a wing tip in the snow and it spun the model 180°. I managed to turn the model into wind just using the rudder.
13 Aug 00 - I managed to get the first flights in yesterday and I'm really impressed by this model.
11 Aug 00 - Other things took priority and I've only just completed the model. Despite painting the fuselage and wings it turned out 3½ oz. (100g) lighter than the stated weight. It is really nice to see a manufacturer that quotes realistically achievable weights The savings are due to using Union Micro UM-9G servos throughout and the extremely light RC Line MSC-50B controller. I am considering applying some fibre-glass tape to the upper surface of the wing to stiffen it for inverted flight, but will wait until after the first flights.
14 Jul 00 - I bought this model at the same time as the Pico Jet, but have only just added to the site. I have started construction by filling all the upper surfaces & sides of the foam components as I intend the paint the model. I have got as far as fitting the wing spars, so not much more work to do. Maybe I'll be able to finish the model tomorrow.
11 Mar 00 - I have noticed a stiffening in the rudder control cable, which is giving the servo some difficulty. As a precaution, I will be replacing both Rudder and Elevator servos with Hitec HS-81MGs, to ensure control is retained. These have over 3x the torque capability for a 2/3oz. (18g) weight increase.
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