Rudder and retract install. A better and cleaner install for the retract than the way I did is to make a metal base for the servo and attached it to the landing gear plate and not glued against the fuselage.
Thursday, February 20, 2014
Building the fuselage
The fuselage will hold the receiver, life battery and the 4 servos. Once is ready I will move to the wings that are easier as I am used to f3j building.
Rudder and retract install. A better and cleaner install for the retract than the way I did is to make a metal base for the servo and attached it to the landing gear plate and not glued against the fuselage.
Rudder and retract install. A better and cleaner install for the retract than the way I did is to make a metal base for the servo and attached it to the landing gear plate and not glued against the fuselage.
The Glider and equipment
The Nimbus-4 family is a direct derivative of its predecessors at the highest performance end of the Schempp-Hirth product range, the Nimbus-2 and Nimbus-3. In total as of 2010, 44 single-seat and 100 two-seat models had been produced. The wing has a multi-tapered planform and the wingspan was increased to 26.5 meters. The aspect ratio is 38.8. The fuselage was also lengthened, and a larger rudder was fitted.
The manufacturer claims this glider has a glide ratio of better than 60:1 at a best glide airspeed of 110 km/h (59 knots), meaning it can glide over 60 kilometers on course for every 1000 meters of altitude lost in still air.[1]
The HKM Nimbus is a 1:4 scale with 6,6m wingspan with 4 piece wing to make the transportation easier and 8 servos on the wings (4 ailerons + 2 flaps + 2 Spoilers).
On the fuselage there are 4 more servos (elevator, rudder, retract and tow release) making a total of 12 servos
Two options for radio installation
a-) regular install with 12 ch receiver (11ch can be used if rudder in Y)
a-) regular install with 12 ch receiver (11ch can be used if rudder in Y)
b-) JR X Bus clean install
For the X Bus, there are several options that can be used
1-) one X Bus 7 channel receiver and x bus expander (1 for each wing) and fuse servos directly on the receiver.
2-) two X BUs channel for redundancy and clean install
Tx hummm, a few good options
1-) JR 12x - great radio ! The nimbus is the perfect thermal machine and +2 hours are easy to achieve...NO telemetry ?
2-) JR XG8 - light, X Bus can handle the 12 servos and much, much more, telemetry gives you the piece of mind for that 2 hours flight, also battery consumption, altitude and future variometer. NO 4 aileron configuration on the glider menu. Why JR, why ? Probably can make it work with p-mix, but not an easy task and it wont be 100% perfect.
3-) JR XG14 - All of the above plus the 4 aileron configuration on the glider menu. Perfect, need to get one.
The glider killer: power supply !
Most of the fatal crashes that I have seen were due to battery issues, so redundancy is a must. Encontec mini handles 2 life batteries and it is light (don't wont to end with a heavy glider), Power box new gemini 2 is also a very good option. Two life of ~3.000 is plenty.
1-) one X Bus 7 channel receiver and x bus expander (1 for each wing) and fuse servos directly on the receiver.
2-) two X BUs channel for redundancy and clean install
Tx hummm, a few good options
1-) JR 12x - great radio ! The nimbus is the perfect thermal machine and +2 hours are easy to achieve...NO telemetry ?
3-) JR XG14 - All of the above plus the 4 aileron configuration on the glider menu. Perfect, need to get one.
The glider killer: power supply !
Most of the fatal crashes that I have seen were due to battery issues, so redundancy is a must. Encontec mini handles 2 life batteries and it is light (don't wont to end with a heavy glider), Power box new gemini 2 is also a very good option. Two life of ~3.000 is plenty.
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