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Re: NON SMOKING EXHAUST WITH AIR INJECTION

, I have caught up now and by reading through the posts to see your journey. I have been on a similar journey - I thought I would share some of my learnings. The electronics in the vape devices may well drive a display, buttons +/- and a display interface etc but the basic electronics for the power to the coil are very simple. The power is "pulsed" to the coil using Pulse Width Modulation - basically in each cycle how much time the power is ON or OFF - very similiar to a domestic dimmer switch. By varying the pulse on/off period (Duty Cycle) I can adjust the power being supplied to the coil The coils do not have a voltage limit (I run my standard coils from a 12v SLA) - they do have power (watts) limit where watts =volts x amps. I am not sure on the spec of you voltage regulator - it may be constant current - so when you drop the voltage to 2.x volts your are essentially dropping the overall watts in the circuit. The resistance of most coils is single or sub ohm so are almost a short circuit - no surprise your voltage regulator gets very hot/spits it's fury I create my pulsed power to the coil using a MOSFET I also have a temperature sensor in place to auto shut things down if needed and will be a able to remotely monitor each of the 9 smoke devices remotely Hope this adds to the subject _._

4 years ago by G6SWJ

Forum

LATEST SMOKER, E-CIG ELEMENT

excellent detail in the photos. Now I have grasped the way these things work. Will definitely be building one in future build. You have done a great job there Elsrickle

4 years ago by Elsrickle

Forum

LATEST SMOKER, E-CIG ELEMENT

, Yes, it still has the expansion tank wrapped around the original 2ml e-cig. The photo I just posted was taken before the expansion tank was fitted. The expansion tank is glued in place with Tensol acrylic glue so it won’t come off easily, and more importantly it won’t leak. In practice, I have found that the smoker doesn’t use much fluid. I last filled it around 2 weeks ago, and I’ve been conducting trials in the workshop, and two trials on the lake. The tank is still 90% full. At that rate, I probably won’t need to refill it until the New Year! That’s not a bad thing as, tucked away in the engine room, it isn’t too easy to get to. Graham93

4 years ago by Graham93

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Re: MORE SMOKER STUFF 2

, Shame about the pumps having waited so long for them. I hope the water pump I’m waiting for doesn’t turn out to be a disappointment when it finally gets here. I think you need to mix the air/smoke stream with the water flow using a Venturi arrangement. I have used a small dia tube, maybe 2mm, to feed the smoke into the water flow. Pulsing the air flow then causes the water to be sprayed out on each pulse, although not as a fine mist. I think trying to pressurise the smoke might just compress it to nothing but it will be interesting to see how you get on with that. Graham93

4 years ago by Graham93

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Re: Exhaust Smoker

, I was thinking of a simple artificial sound generator as that isn’t too difficult to put together. I think it would just be a bit more software in the revised controller I’m putting together. However, I’ve just been browsing my favourite on-line store and found this. There also seem to be plenty of sound files available on the www to download. Would undoubtedly sound better, but unfortunately it will have to go on my ever increasing ‘to do’ list😉 Graham93

5 years ago by Graham93

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Re: Exhaust Smoker

, I've tried a couple of air pumps and prefer the one salvaged from the blood pressure monitor as it is a diaphragm pump which seems to give it more grunt, despite running on a lower voltage. It is also smaller than the other one I tried so it was easier to fit under the footwell floor. Your original posts got me thinking about how to solve the challenge of making something that gives a realistic effect. I love a challenge like that 😀. Now you have suggested it needs sound to go with it. Just when I thought we were nearly there 🙄. Something else to think about... Graham93

5 years ago by Graham93

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Re: Another Exhaust Smoker V2

, I’ve now got the smoker working on the throttle so the pulsing rate increases as the throttle is pushed forward. It does that by shortening the smoke off time between each pulse. This does mean there is more smoke as the throttle accelerates which is dramatic, but maybe not accurate 😀 I think if I shorten the on time as the throttle moves forward it would reduce the smoke. The water is a constant flow. If I hold the throttle full forward for a couple of seconds, the smoker switches off. Graham93

5 years ago by Graham93

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Re: Another Exhaust Smoker

, I have worried a bit about pond pollution, but I’m using diluted glycerine as smoke fuel. It is water soluble, and it only uses a tiny amount, most of which is vaporised, so I think it will be OK. Graham93

5 years ago by Graham93

Response

Re: Fire Monitors Part 4

, Re: How about using something like these remote switches which I use on my HSL and ST to turn pumps and lights etc on/off. Yes, that would work but I should have explained the issue clearer. With the pump plumbed on the feed from the pickup as you suggested, the pump will need to run both when the monitors are in use and for cooling the motor/ESC. With they way I have it plumbed currently, the pump doesn’t need to run to cool the motor/ESC. If I do find I need to change it round, I’ll probably put a remote switch together to connect to the throttle channel and the solenoid (fire monitor) channel. The switch could then turn the pump on when needed for either function. Graham93

5 years ago by Graham93

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Re: SEAPLANE TENDER TANK TEST 2

, "And the refinery gets bigger" I've been trying to get my head round how you intend to mix the smoke with the outlet water without flooding the boat!😮 I just ended up with my brain more inside out than usual and a headache🤕 😎

5 years ago by RNinMunich

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Re: 40'' Seaplane Tender, new build. Finished !

. I think what you have created is excellent and very true to the boat in your original 'photo. Your level of finish and detailing is to admired. Congratulations and happy sailing, I hope the weather will favour Jaguar's maiden voyage. Rob.

5 years ago by robbob

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Re: 40'' Seaplane Tender, new build Z-1

, I forgot to answer your question about the deck cleats. Just looking at the photos they seem correct. Deck cleats come in a lot of sizes so only an expert on that type of boat will be able to say. (or a scale rivet counter LOL!) If they start to bug you then partly hide them with slightly under scale rope. It could be just one of those things that gets in to your head. As my profile signature says:- "If it looks right then it probably is." Martin555.

5 years ago by Martin555

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Re: 40'' Seaplane Tender, new build Z-1

, Ref windows. Depending in the plastic used for model windows I have discovered this glue. It is milky in colour but then dryers Cristal clear. So if a little gets on the surface of the window then it will not notice. It is called. Diall I don't know if you can get it on eBay as I have not looked. Martin555.

5 years ago by Martin555

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Resurrection could be possible.

, I add the photos first then the text. Martin555.

5 years ago by Martin555

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EeZeBilts From Keil Kraft

, I like the idea. The design that DG is working on will still be using the EeZeBulit method, it is just the Bow that need to be sorted out so that it is easy to make. Martin555.

5 years ago by Martin555

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Re: 40'' Seaplane Tender, new build R

, Now that you have been able to splash a bit of colour on her I bet you feel as though you are finally starting to get somewhere. Keep up the good work. Martin.

5 years ago by Martin555

Forum

Fishtailing

, I have started a new thread on hidden switches as I don't want to deviate from this thread topic. Martin.

5 years ago by Martin555

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Re: 40'' Seaplane Tender, new build M

, Will the heat exchanger cool the water quick enough ? Martin.

5 years ago by Martin555

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Hints and Tips.

, Boozy lot you ANZACS!! 🤣 Prefer Tawny Port meself😉 Down the hatch lads, Cheers, Doug 💤💤

5 years ago by RNinMunich

Forum

Help and advice please

, At 2.4Gig some is reflected and some refracted into the water but is then rapidly absorbed through heating the water molecules. Just like your Microwave oven which works in the same frequency band. So don't take your microwave down to the lake with you to warm up your lunch!!😂 The absorption rate (and hence depth penetration) is a function of the wavelength and salinity of the water. The shorter the wavelength (= higher frequency) the higher the absorption and inverse. That's why real naval subs use the VLF (Very Low Frequency) band to receive their orders when at depth. Frequencies used are around 8kHz or less so they can only receive very low data rate signals, more seconds or even minutes per byte rather than the MBytes/sec we are used to!! They can't transmit an acknowledgement as the TX antennas used are kilometres long at these frequencies! At the depths model subs (intentionally!) reach, ca 1 to 2meters, 40MHz is OK, 27MHz gives a slightly stronger signal at the same depth. The modulation itself also having an effect; due to the fact that FM signals have a constant amplitude (peak to peak voltage) whereas AM has an amplitude which goes up and down with the modulating signal (pulse train) as the name implies. Thus the FM receiver has more signal voltage to work with. Here endeth today's lecture 😉 Anyone still awake?💤💤 Cheers, Doug 😎

5 years ago by RNinMunich