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P7230240
IMG 5876
IMG 5872
41176958-EFF3-49C6-8004-A401AC0F95F8
IMG 5866
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3C2A1882- 132 3266
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Getting started When I remembered I wanted to take pictures of the construction, this is far as I was already. - 132 3274
Side view - 132 3275
The swash plate This little device is freaky. In a nutshell, the pitch of the blades varies through their rotation, according to the motions of the aileron/elevator servos (called cyclic on a helicopter) and the collective pitch. It's all a bit mad and I onyl slightly understand it so far. - 132 3276
The engine OS 32 helicopter engine. Here it is with the Raptor cooling fan attached, basically a centrifugal fan. - 132 3277
Engine, closeup - 132 3278
Engine, other side - 132 3279
Engine in the frame - 132 3280
Engine in the frame, closeup - 132 3281
Engine in the frame, other side - 132 3282
The engine The slot-shaped hole you can see is where the exhaust (muffler) pipe will attach, when it arrives. - 132 3283
Assembling the rotor head These bits will eventually sit atop the swash plate. - 132 3285
Rotor head bearings At this point, I only assembled one end of this piece. The bearing set in the bag fit onto the shaft with a collection of washers, spacers, bolts, loctite and so on. It's all a bit busy. Particularly sicne I forgot to put in a supporting piece rigth in the centre to had to disassemble the thing. - 132 3286
Look at the mess! - 132 3287
Rotor head and flybar The fly bar, I think, ,ostly balances the main blades. They are on a single bar whose pitch alters with the cyclic, but not the collective (I think, lots of "I think"'s here!). The bar is supposed to be near-perfectly balanced otherwise it causes really nasty vibrations in the rest of the machine. Rememeber, this thing is a huge spinning top, really. - 132 3288
Flybar again - 132 3290
Tail rotor assembly This was a fiddly piece to put together. - 132 3291
Tail rotor assembly The red coloured pulley is a two-piece item, a flange fits on one end, and it can go two ways round. The correct way si with the shorter end into the pulley, longer end outwards. Otherwise, as I discovered, there is about 2 to 3mm play in the tail rotor shaft. Not good. - 132 3292
Coming together nicely now Tail piece is in, various tail-plane bits and bobs. The tail rotor blades are on the wrong way round here (and remained so for a while) until I realised I had the belt on the wrong way. I noticied this long before firing up the engine, thankfully. - 132 3294
Tail rotor The orange material you can see through the hole is the belt. The blades twist together, in opposite directions. This is how you point the helicopter. - 132 3295
Main drive wheel The belt goes back to the tail rotor. The grey spindle meshes with a drive wheel on the engine drive shaft. There is a shaft going up through these two wheels directly to the rotor hub. - 133 3303
Beastie so far - 133 3304
Clutch The silver drum in the centre of the picture is the clutch bell. Inside this is a clutch disc, which runs directly from the engine below it. It's designed to be fully diengaged below about 7000rpm and fully engaged above 10000rpm. The rotor blades operate at a fraction of this speed, not normalyl going faster than about 1700 rpm. - 133 3305
Gyro This is described by many as the "most cost effective" stabilisation gyro on the market at present. It's job: keep the machine pointing in the direction you want it to. In the old days, you would program a "revolution mix" into your radio which altered the tail rotor blade pitch according to what you were doing with the throttle/collective, the idea being that you could match the rotational energy being put out by the main rotors to make the tail rotor counteract it, and keep the machine steady. Technology these days simply measures the rotation and does what it needs to counteract it. Funky. This is what makes the difference between whirly-top-with-dangerous-bits and simply "dangerous". - 133 3306
Digital servo The Gyro came with this servo. Because the tail rotor pitch is being computer controlled, and you want it to react fast, you have to use a fast servo. Better yet, you use a digital servo, which mostly means the servo PWM's the motor inside much much faster. This is a reasonably speedy digital servo. When it's going, it whines a bit, but I am pretty sure that's normal. - 133 3308
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Progress! With the main rotor blades on, it's starting to look like a helicopter now. - 133 3327
It's looking a bit big Note we have an exhaust (muffler) now also. - 133 3328
The exhaust It's shiny now. I'm sure that will change. The silicone pipe runninf from it is a fuel tank pressurisation aid. There's no fuel pump - a certain amount of exhaust gas is used to push the fuel into the carb of the engine. Quite neat, really. - 133 3329
Rotor hub It's really busy up here - I can't imagine this thing spinning as fast as it will need to. - 133 3330
So far... - 133 3331
The body/canopy This will be it's ultimate shape. - 133 3332
Rear view - 133 3333
Size comparison The universal measuring device: A Coke can. - 133 3334
Size comparison - 133 3335
The electronics arrived All the servos are on, the receiver is mounted and hooked up. - 133 3336
Busy busy There's a lot going on with this machine. - 133 3337
Wires/servos Much cabling. Notice how I had to trim some of the servo "horns" - they interfered with the ball-link attachments. - 133 3338
The radio I decided to start small. A 6-channel JR transmitter. It came with the servos and a 7-channel receiver. - 133 3339
I fired it up... So, I took it outside, just to fire up the engine. Nobody else around to take pictures, so this is after the event. They definately make good lawn mowers - notice all the grass and grass stains. I'm so far away from flying this thing (still practising on the simulator) but I thought it would be good to give the engine and mechanics some exercise before it does fly. These things are not quiet! - 133 3340
Outdoors [1/4] - 133 3341
Outdoors [2/4] - 133 3342
Outdoors [3/4] - 133 3343
Outdoors [4/4] - 133 3354
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Cables everywhere- DSC00098
Tara - DSC00100
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00101
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00102
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00103
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00104
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00105
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00106
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00107
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00108
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00109
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00110
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00111
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00112
Defects Picture taken of Appt. in Arlington prior to moving in - DSC00113
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First print in progress
Hotend fan- IMG 2971
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IMG 4482- IMG 7555
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