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[vintagent]

Just wondering how to make an electric powered model of a mahogany speedster, runabout, etc. have water burble out of the exhaust pipes like the real ones.
Has anyone done it?
I'd like it to be all the time even when the model's sitting stationary. I fancy a centrifugal clutch with the motor working some sort of sound box on "tickover".  Please don't suggest digital sound.  Not impressed and can't afford it anyway, but the water splashing out of a wet exhaust does appeal.
I imagine it would need a low output pump of some kind, which could be separately powered.

Regards,
Vintagent

[John Mk2]

Hi What about one of those Graupner water pumps (12 volts) running on 50% volts or lower ? Might work As for the sound aint got a clue

[vintagent]

Hi John,
Graupner water pumps??

I'll look into it. Thanks.

Vintagent

[John Mk2]

I Think Robbe make them aswell  Shame i had a unused one (went with the Springer) i sold 2 weeks ago

[vintagent]

DOH!!!

[John Mk2]

Here ya go  Do 6 volt aswell 

http://www.westbourne-model.co.uk/model-boat-electronics-4704-0.html

[vintagent]

Thanks John, that's given me something to think about.
Regards,
Vintagent

[John Mk2]

If you run it from a small E.S.C on a spare ch   (if you have one)   you can then turn it on/off up/down from the t.x  Just a idea

[Circlip]

You could bubble it out the back using a submerged pick up as the old cooling systems for ic enginines Vint. but you're not going to get the burble sound without using a half submerged ic engine exhaust.

  Regards  Ian.

[John Mk2]

Getting a bit deep this (So to speak)

[vintagent]

Hmm, you'd need a submerged exhaust to get a burble, but most woodies had wet exhausts above the waterline.
So I was thinking of a sort of sound box which was physically bashed by something on a motor's end which would give a deep drumming big block sound as well as driving a pump.
Failing that there are a lot of kid's cheap toys which have really rather good sound in them.  Get that bit out and just loop it?

Regards,
Vintagent

[Drkomen86]

why dont you do it the very simple way,
use a water pick-up and rap a thin copper/S.Steel pipe around the exhaust for cooling then at the end about 1" from the tip of the exhaust drill a hole and fit the cooling pipe into it.
cant see why that wouldnt work 

[Arrow5]

why dont you do it the very simple way,
use a water pick-up and rap a thin copper/S.Steel pipe around the exhaust for cooling then at the end about 1" from the tip of the exhaust drill a hole and fit the cooling pipe into it.
cant see why that wouldnt work 

  ...on an electric boat ???

[Drkomen86]

I thought I had seen that it was a nitro boat, most prob won't work then 

[Klunk]

why pay for expensive robbe/graupner water pumps????? I use car washer pumps, much cheaper!!!

[FullLeatherJacket]

Please don't suggest digital sound.  Not impressed and can't afford it anyway

Well - that's put the lid on 18 months of work and investment, eh? There's nothing like objective criticism, is there?
You could use a 12v pump on a 6v supply and couple it up to a forward-only ESC running in parallel with the main motor ESC. I imagine M******s or E*********e would be able to help you. They may even do easy finance terms. 
If not, you know where to come............ 
FLJ

[vintagent]

FLJ,
What I've heard so far hasn't impressed me and they are a bit pricey for what is after all, a bit of a gimmick.
But, of course, if you do a really convincing Gray Fireball 6 or a Sterling, or maybe even a Liberty tickover to flat out that works with the motor, I could possibly be tempted!

Klunk, I'd considered a car washer pump, but thought it might be a bit intense, though on 6 Volts as people have suggested, it could be good. I'll try that to start with.

Regards, Vintagent

[FullLeatherJacket]

FLJ,
What I've heard so far hasn't impressed me and they are a bit pricey for what is after all, a bit of a gimmick.
But, of course, if you do a really convincing Gray Fireball 6 or a Sterling, or maybe even a Liberty tickover to flat out that works with the motor, I could possibly be tempted!

Please don't judge all such systems on the basis of just one or two examples of the genre; wait until you have heard them all, because they are NOT all the same.
For example, if you can obtain a recording of these engines then we can do an EXACT rendition of them. You will not find another system which affords you this facility for less than twice the price of P100.
On the subject of "gimmicks", some  might argue that water coming out of the exhaust outlets falls more into that category than a realistic engine sound.
Of course I couldn't possibly  comment.............  
FLJ

[vintagent]

FLJ, fair comment. I haven't heard them all, of course.  Alas, I couldn't find one of those engines, except possibly a Gray, since they are the preserve of the Americas, to which I cannot go and I have no means of recording them anyway, but it might well be an idea for you to do when you are attending shows or driving round the land, to take in a meeting of the Classic Motor Boat Association where Chris-Crafts do attend along with Albatrosses and Deltas, Healeys and various outboard powered boats.  One big six is likely to sound like another.
Of course a lot of these kind of boats now have modern American V8s installed, and they called be recorded at any hot-rod show.  I assume you run it as a loop, so a few seconds of steady running would do.  But that watery burble can only come from one place.

And that is SUCH a feature of a woodie/speedboat that I think it is far from a gimmick.  It would cause surprise and a smile and what could be better than that?
But i mean it...if you can come up with a realistic old big engine burble, I'd buy one!  And you won't hear that very often from me<G>

Regards,
Vintagent

[FullLeatherJacket]

But i mean it...if you can come up with a realistic old big engine burble, I'd buy one!  And you won't hear that very often from me<G>

We manufacture a digital sound play-back module. Along with this comes a CD with some sounds which we have obtained for use by modellers. There are thousands of other such sounds on the Internet, and an almost infinite variety out there in the real world. That's the reason why we designed the unit to be user-programmable. If you want a realistic engine burble then by all means go out and find one to use (just like Gribeauval has done) , but I'm afraid we just don't have the resources to do it all for you. To the best of my knowledge no manufacturer of such units offers this service.
FLJ

[Circlip]

Next ones going to be interesting Vintagent, once you've sorted the sound system out, how are you going to sort the scale "Bounce" and wake of these on the water???

  Regards  Ian.

[vintagent]

Aha, the wake can't be reproduced really. Shame.  Weight is probably the answer with a proportionally powerful motor to over come it.
I will be playing around with a scale speed for the woodies, so maybe the weight thing will have to be a part of it.

FLJ, how does one put the sounds on the box o'tricks?  Can that be done through the computer by taking sounds off youtube, for example?  Not that I'd have a clue how to, even if it could! 
How much is your programmable module, please?   
Apologies to mods if this looks like commercialism, but it is useful to know these things.

Regards,
Vintagent

[FullLeatherJacket]

http://www.action-electronics.co.uk/pdfs/P100.pdf
Enough to get you interested, or put you off totally...............
Suit yourself
FLJ

[Drkomen86]

thats a nice piece of kit and with sounds like http://www.youtube.com/watch?v=f2hlcnrREcg&feature=related would work perfect 

[FullLeatherJacket]