Thanks for the info Martin, looks interesting. Might have a look on Ali Express and see what's available. I did manage to get the 'model Y' working in the HSL with the twin pump set-up but the problem was the same as before, with the exhausts on the waterline. If the boat was dead still and level it worked fine, but the moment either exhaust went under water it stopped working and the smoke just came out the opposite side. I hadn't fitted it properly and had wires and bits everywhere and all the stuff necessary would not have fitted anyhow.
You need an air pump, voltage reg, smoker
and water pump, plus all the hoses, so it's a lot of bits to fit into a space that's 2"W x 4"L x 2"H. Basically, to make it work as it is, I'd need the twin pumps
(to keep the tubes clear (as in this vid), plus the water pump, plus a smoker
, plus a smoker
air pump, plus all the plumbing ( see drawing) It might not be a problem if it didn't have twin sound units and all the other bits and pieces, plus the drop floor in the wheel house which takes up heaps of space (not to mention 2x 2s LiPos, 1 3s LiPo and a 3v dry cell pack for lights/small air pumps
I might just leave well enough alone for now and have a look at your suggestion for the ST, which although not having much room under the cockpit floor, might have space for a small unit like that. Had another idea along similar lines, using ready wound coils on a base, packed with cotton and slid into a small alloy tube with end caps. They would be small and very basic and you can buy coil selections with various ohm ratings.
I found the new coils I bought (50-85w are way too grunty and suck 3,7A at 2.46V - 41w (good smoke), but the first one I tried in the alloy box (40-80w) was only1.6A at 2.46v - 18.9w (good smoke) so there is a lot of experimenting that could be done for the best coil type.
We have now (1 DEC) have had 15% GST (grab and snatch tax) put on all online O/Seas purchases, - incl freight (this labour govt is giving money away flat out so they have to steal it off us somewhere else) so this is going to add a big cost to R/C modelers here. Prices round the country are going to go up on every NZ online store as well. All because of entitled shop owners whining because they can't rip as many people off as before, - seem to think it's their right not to have any competition, - supposed to be a free market economy!?? (funny the govt is not targeting their online purchases, - only private sales ) If these useless t..ts get back in next time I might consider becoming Australian!!😠😠😠😠 My favourite $2 shops will probably be $3 shops now!.
All that means I'll be buying less online now (batteries
will now be an arm and 2 legs now) so I'm glad I bought all my expensive bits (TXs etc) years ago!