OK, that's great and this Cox/turboplug assembly can be used on Cox AND Norvel .049 and .06 engines. But what if you have a Norvel .074 or even the CS/Brodak engine? As in the Brodak engine thread, MUCH free power can be had by installing a Norvel plug or a turbobutton.

Well, thanks to a suggestion from Stewart (SGC), I had another look at how this could be done without a lathe. Normally, you have to make a button on a lathe. This, I thought, would be necessary because the stem of a stock, Norvel plug is just too small in diameter,,, not enough meat. Well that was determined by eyeball and I was wrong. Now you can put to use all those blown, fried and just plain worn out Norvel plugs.

Here we go.

First picture shows a stock Norvel plug secured in a vise and the crimp being sawn off to remove the stem. Just work the blade round and round till the whole mess pops off and pull out the filament. Dress off the rough, top edge with a file and then, using your Cox, mounted in the vise cylinder, secure the blank with a Norvel head clamp.

Then proceed as normal. You'll find that the wall of the threaded portion looks to be way too light but so far it holds and the plug seals nicely when it's screwed in quite firmly.

For Norvel .074 buttons, do the same except that you're going to have to use a kaffed Norvel .074 cylinder as a holding jig. DON'T use a good one, you'll ruin it, the bottom stem will likely get distorted in the vise. No, this isn't a don't ask me how I know deal,,, just don't take the chance.

And there you have it, turbo plug devices for your Cox, Norvel and CS/Brodak engines. Turbo plugs come in a variety of brands and heat ranges. OS has three from cool, to medium, to hot and Rossi has eight from extremely cold, to extremely hot. Now you can pipe that Norvel to 40K on 60% fuel without blowing a plug on every flight. [X(][X(][X(]