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| Another version of how not to build a model engine |
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| Stilldrillin:
It`s much smaller than I thought too...... :bugeye: David D |
| sorveltaja:
What comes to that carb needle -dilemma, it's time to make a needle body, that has grub screw to hold the needle, as it allows testing different needles. The idea came from this: Above, the grub screw doesn't actually hold the needle, but instead possible extension piece. And here is more than enough meat for practicing: The safety pins are of 1mm wire, so it's possible to use a mini-drill for making different tapers. |
| bogstandard:
S, --- Quote ---so it's possible to use a mini-drill for making different taper --- End quote --- Are you using a tapered bore in your inlet? If so, you will not get very good control as you are using two tapers, when they start to open up, they grow apart too quickly. You must only use one taper (the needle) to get good results. Please see C-o-C. Bogs |
| sorveltaja:
Bogs, thanks for demonstration. Anyway, I intend to use the taper on needle only, to keep things simple. I'm not even quite sure, how to make a decent tapered bore, so I have kept myself away from it. |
| bogstandard:
S, I found that sewing needles had a much longer taper, so aiding much finer adjustment, and they were stuck into the threaded holder with Loctite. If you need to go up a size, just warm the holder up and the loctite will give way, allowing another needle to be fitted. Bogs |
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