Thursday last week saw the first attempted run of my nitro tethered car at my local track.
First the positives,
- At first, it started easily using the 'push on spinner' airplane electric start on rear wheel, radio control of the throttle worked quite well until the carb worked loose, but I really do need to remove the spring centering device on the TX, 1/2 throttle caused the engine to scream when off load.
- Engine seems to have sufficient power when using the now higher 1:3 gearing
On the bad side, (To be fair this was its first shake down)
- It was raining heavily, all my gear and I got soaked.
- No grip on track, it was soaking, couldn't push start
- When it was running it had no grip and wouldn't run 'straight' on the track against the tether. Any power and it would just spin out. Managed just half a lap of fish tailing plus a fair bit of water spray.
- Changed tether connection point, (governed by centre of balance of the car, but seemingly affected by the wet track and lack of grip)
- Broke lots of things!
- Fixed lots of things several times (In the pouring rain)
- Eventually I could start it but it wouldn't run for very long, likely/possible fuel starvation, I noticed the carb was very loose in mounting, (air getting in?), also I think I need to raise the gravity fed tank.
- Drive shafts started to work loose in the couplings, very bad as this requires the rear suspension and gear box to be dismantled to access to tighten.
- Newly fitted Mardave rear shaft UJ donuts can't cope with the torque of the starter motor via the rear wheels, (deformed/no longer round), even worse!
Picture taken at home before run.
After staying to be sociable, watching others attempt their runs in the rain, we found that only the air-screw cars had any, (but not much) success.
Put on brave face, Licked wounds and after a couple of hours left for home!
Sorry no photos/videos of the action, I didn't have the time or the energy to get the phone out for the half lap it managed, I was feeling a bit flustered/deflated.
This weekend saw a lot of repairs and modifications, mostly to address the above but also other things I didn't notice on the day, next meet is in one month's time, then we shall see it fly, Queue, '
the sound of wild cackling laughter'!
The next car very likely to be electrically powered, must get the design on the 'drawing board' I will not be beaten by this game, 'Yet' :0)