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>> Home > Forum > Any Other Questions! > Smoke generator
Smoke generator
(630 views)
Author Message
Dick
(Petty Officer)





Forum Posts: 5
25th Nov 2018 12:13  
>> Permalink
mdlbt.com/48306

Can somebody tell me the best smoke generator to use in a small tug approx 30 " preferably controlled by throttle.
I would like to make one,I have nichrome wire anyone done this successfully cheers.

figtree7nts
(Fleet Admiral!)





Forum Posts: 505
25th Nov 2018 12:36  
>> Permalink
mdlbt.com/48308

Hi Dick,

No I haven't made one!
I purchased mine from Harbor Models in the US!
You didn't mention how many volts your tug will be!
But what about something like this!
https://www.cornwallmodelboats.co.uk/acatalog/graupner_2324....

Cheers, Ed


"Fair winds calm Seas"
Dick
(Petty Officer)





Forum Posts: 5
26th Nov 2018 05:36  
>> Permalink
mdlbt.com/48369

Thanks ed just checked YouTube, not quite sure how long smoke last.

figtree7nts
(Fleet Admiral!)





Forum Posts: 505
26th Nov 2018 10:52  
>> Permalink
mdlbt.com/48371

Hi Dick,

It's a small smoker.
So, I figure it probably smokes for about 45-1 hour!

The one I have. smokes for 3 hours.
On one fill of smoker liquid!

But maybe you can call Cornwall Model Boats.
And ask some questions!

01840 211009
Cornwall Model Boats Ltd
Unit 3B, Highfield Rd Ind Est,
Camelford,
Cornwall,
PL32 9RA,
United Kingdom.

Cheers, Ed


"Fair winds calm Seas"
landie
(Chief Petty Officer)





Forum Posts: 5
26th Nov 2018 12:44  
>> Permalink
mdlbt.com/48372

I'm in the middle of building an ultrasonic generator, tests so far look good but only played with it on the bench.
Just add water... so easy enough to refill and costs nothing.

jbkiwi
(Commander)





Forum Posts: 3
26th Nov 2018 14:20  
>> Permalink
mdlbt.com/48386

Been thinking how I could build a compact sealed electric smoke generator with a pump to push the smoke through the exhausts, along with the cooling water on my HSL.
Are the model train smokers not big enough for your purposes. You could just copy one of those and enlarge it perhaps. From what I remember from my train days they were not too complicated. How about an upside down ic glow plug with a variable voltage regulator in the bottom of a tube with a low temp oil ?
You could possibly use a small brushed ESC for the regulator and come up with a controlled drip feed replenishing system. Just seen a site SMOKE EL in Germany which makes smokers for ic and electric planes but they look expensive and complicated,- work well though,-vids on site.

Dick
(Petty Officer)





Forum Posts: 5
29th Nov 2018 18:48  
>> Permalink
mdlbt.com/48480

Good idea using a glow plug,I'll try it soon with baby oil.
Thanks Dick

marlina2
(Chief Petty Officer)





Forum Posts: 9
30th Nov 2018 20:58  
>> Permalink
mdlbt.com/48532

I have made a smoke generator using a piezo transducer and a P68s variable speed brush less fan controller from action electroncs. The transducers tend to be 24v dc and are relatively cheap (£2-£3 each). I am using S3 lipos so I only have 11.4 available but a very cheap variable output unit gives me 24v. The fan is connected in-between the receiver channel for the throttle and the speed controller. The fan speed increases with the throttle and follows the throttle speed regardless of direction. The net effect is quite pleasing for diesel exhaust simulation, with a steady stream when the stick is centralised and the fan just idling. On fwd/rev throttle movement you get an increasing amount of exhaust dependent on speed. I have this installed in my Forceful paddler with twin funnels. The effect is quite realistic but can be difficult to see. I am looking for a another transducer that will produce more vapour. in its present configuration it will run for around 3 hours before topping up is required.


Attached Files - Click To View Large

RNinMunich
(Fleet Admiral!)





Forum Posts: 2483
30th Nov 2018 23:42  
>> Permalink
mdlbt.com/48537

Hi Marlina,
I'm intrigued! How do you use a piezo transducer to produce vapour/smoke?
Where does the 'squeeze' come from?, and how does the miniscule spark (ca 1mm per 3000V, if you're lucky😉) produce vapour?
What 'fuel' do you use? Oil smoke or water vapour?
The P68S is clear, typical good quality from A.E.
Cheers, Doug 😎


Young at heart - slightly older in other places 😉 Cheers Doug
landie
(Chief Petty Officer)





Forum Posts: 5
1st Dec 2018 00:11  
>> Permalink
mdlbt.com/48540

It is a piezo speaker, no spark involved or heat of any kind. It uses an ultrasonic wave to vaporise water.
For example...
http://www.wicksteedparkmbc.com/smoke-generator.html

RNinMunich
(Fleet Admiral!)





Forum Posts: 2483
1st Dec 2018 00:24  
>> Permalink
mdlbt.com/48541

OK landie. A known technique.
So it's a steam/water vapour generator, not smoke.
No wonder it's not too visible.🤔
Would be interested to see the circuit that Marlina used to generate the ultrasonic waves in his home brew version.
Nevertheless, think I'll stick to 'oil burners'.😉
Cheers, Doug 😎


Young at heart - slightly older in other places 😉 Cheers Doug
landie
(Chief Petty Officer)





Forum Posts: 5
1st Dec 2018 00:41  
>> Permalink
mdlbt.com/48542

I assume marlina2 is using the same as the one I linked to, no circuit required other than a 24v supply. The fan speed and the depth of water over the transducer seem to be the key factors in how much vapour is produced.

I’m using a single funnel and twin transducers in mine, if I ever get it packaged small enough to fit in my model !

RNinMunich
(Fleet Admiral!)





Forum Posts: 2483
1st Dec 2018 00:49  
>> Permalink
mdlbt.com/48543

Thanks landie.
I had assumed that Marina's is a home brew job since he wrote that he 'made a smoke generator'.
Some pics of your version would be nice👍 What model?
Cheers, Doug 😎


Young at heart - slightly older in other places 😉 Cheers Doug
landie
(Chief Petty Officer)





Forum Posts: 5
1st Dec 2018 12:04  
>> Permalink
mdlbt.com/48550

Mine is still in the "pile of bits on the bench" stage but when I figure out how to package it I'll post some pics.

The model it's going into is HMS Cadiz, battle class destroyer which is around 1:96 scale so there's not a huge amount of space available, especially as the funnel is currently above the radio gear and batteries so I'll need to pipe the steam from the spare compartment I have nearer the bow.


Attached Files - Click To View Large

marlina2
(Chief Petty Officer)





Forum Posts: 9
1st Dec 2018 16:59  
>> Permalink
mdlbt.com/48556

A bit of confusion over what i wrote last night (note to self dont mix the internet with rum) I did not use a piezo unit, I used ultrasonic units, the kind that are fitted to fire places to produce the smoke and flame effect. The water depth seems to be the critical factor in the amount of mist produced. I am not looking for masses of dark smoke just enough to simulate diesel exhaust. This was just a prototype that works quite well but I am going to revisit it and try to improve the output and look for an ultrasonic unit that will work at 12v

RHBaker
(Fleet Admiral!)





Forum Posts: 114
1st Dec 2018 19:51  
>> Permalink
mdlbt.com/48560

Good looking destroyer, the prettiest of all in my mind. What type of shaft couplings are those? Look rather unusual

landie
(Chief Petty Officer)





Forum Posts: 5
1st Dec 2018 20:07  
>> Permalink
mdlbt.com/48562

I made them myself (and engine mounts, battery mounts etc...) on my 3D printer. I printed a solid version to line up the motors then replaced those with the flexible ones afterwards.

RHBaker
(Fleet Admiral!)





Forum Posts: 114
1st Dec 2018 20:44  
>> Permalink
mdlbt.com/48563

Look good, too complicated for me though

RNinMunich
(Fleet Admiral!)





Forum Posts: 2483
1st Dec 2018 23:50  
>> Permalink
mdlbt.com/48566

Hi Rowen,
Looks very similar to what I fitted to my Sea Scout.
I bought it from Krick here in Germany. They ship round the world and very fast👍😉
https://www.krickshop.de/Accessories-Spare-Parts/Accessories...
Copes with my Propdrive 1000kV on a 3S very well 😊
You can buy the basic coupler and inserts for various motor/prop shaft diameters separately to mix and match as required.
Copes with the power, is silent and slop free 😊
Cheers, Doug 😎
PS I turned up a rigid alu coupling in a few minutes on the lathe to do the setting up and alignment, much much quicker than faffing about with the 3D printer. Yes I do have one, but seldom used. The lathe and miller are quicker for one-offs.


Attached Files - Click To View Large


Young at heart - slightly older in other places 😉 Cheers Doug
RHBaker
(Fleet Admiral!)





Forum Posts: 114
1st Dec 2018 23:52  
>> Permalink
mdlbt.com/48567

Thanks Doug, will have
a shufti at their site. They look good
Goodnight
Rowen

Rookysailor
(Commander)





Forum Posts: 112
2nd Dec 2018 00:11  
>> Permalink
mdlbt.com/48568

If it's smoke you want, I think this might just be the best available, a bit pricey, but have a shufty at the video, and you will see what I mean👍
https://www.ebay.co.uk/itm/RC-Model-Boat-12-Volt-Smoke-Gener...
Peter😉

RNinMunich
(Fleet Admiral!)





Forum Posts: 2483
2nd Dec 2018 00:12  
>> Permalink
mdlbt.com/48569

G'night All, Sweets dreams 😉


Young at heart - slightly older in other places 😉 Cheers Doug