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[Big Ada]

Having watched the Video, I have the urge to build one, but not sure what I need, apart from, a 4 channel Radio, Motor/ ESC/ Prop, 2 Servos/ Rudder and elevator, something to make it go down and up again, a few tubes and wires, and the 3 Jars.
I do not know the builder, but wonder if he would please assist me and some Members from my Club.

Thanks for any help given.

Len Ochiltree, Dover, Model Boat Association.

[roycv]

Hi just seen it on You Tube
https://www.youtube.com/watch?v=lV2YrXe9v80

Its great it looks the part and is so simple.  Just a layout drawing would be enough but the essential part seems to be Morrisons jam jars!  Type of jam revealed in the video.
regards Roy

[jaymac]

 Interesting alternative


https://www.ebay.co.uk/itm/Nikonov-Submarine-350mm-Unassembled-Wooden-Model-Boat-Ship-Kit/254397581627?hash=item3b3b47093b:g:XKgAAOSwCOJdr8QD

[chas]

Len & Roy, thanks for sharing that video, I've never seen it before. Truly brilliant, it perfectly shows the spirit and skill of a true experimental modeler. I suspect that there are a great many people on here who would like to see more detail of how he did it. I've a lot of respect for modelers that find a way to make things themselves.
Chas.

[Subculture]

The principles involved in making this are the same as any other dive module, just that jam jar's are being used in place of plastic pipe, and some control surfaces have been added with a support frame. It uses a pump to push water into a sealed ballast tank, with a pinch valve preventing pressure from pushing back the water out once the pump is stopped. This system maintains an exposed water surface, which can slosh about affecting the boats centre of gravity. So this builder has sensibly placed the ballast tank jar upright, which keeps slosh to a minimum. This sealed tank, pump based ballast system was commercialised by Eden/Sheerline.

Personally I would rather use plastic pipe and o-ring seals when submerging expensive electronics, but each to their own, and you can't trump the novelty factor.

[Big Ada]

The principles involved in making this are the same as any other dive module, just that jam jar's are being used in place of plastic pipe, and some control surfaces have been added with a support frame. It uses a pump to push water into a sealed ballast tank, with a pinch valve preventing pressure from pushing back the water out once the pump is stopped. This system maintains an exposed water surface, which can slosh about affecting the boats centre of gravity. So this builder has sensibly placed the ballast tank jar upright, which keeps slosh to a minimum. This sealed tank, pump based ballast system was commercialised by Eden/Sheerline.

Personally I would rather use plastic pipe and o-ring seals when submerging expensive electronics, but each to their own, and you can't trump the novelty factor.

Thanks for that, what Pump do We need please. Oh and Pinch Valve??.

Len.

[Subculture]

Please try doing a little googling and you should find the answers you're looking for e.g. model subamrine pinch valve, model submarine sealed ballast system etc. The pump is a geared type that used to be sold via Ripmax amongst other retailers and used for pumping fuel, but works well with water too. Sadly production moved from France to China, and quality isn't what it was, so longevity/reliability may be a factor. I think the one used in the jamjar sub is one of the older French made units. The major flaw is the quality of the gears on the later versions.

https://www.ebay.co.uk/i/113679779398?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160908110712%26meid%3D8bb03fb6d0664b2aad217bc85107682f%26pid%3D100677%26rk%3D5%26rkt%3D30%26sd%3D254077381393%26itm%3D113679779398%26pmt%3D1%26noa%3D1%26pg%3D2386202

[Big Ada]

I do hear that Model Boats Magazine have an Article about this Sub in the latest Edition.
WH Smiffs still have the December one for sale, Just a Heads Up Guys.

Len, I have the Jars, just need to empty them etc.

[derekwarner]

The real issue here [quality isn't what it was] is I suspect the design & intended purpose...


They may have been badge engineered and sold for pumping model plane aero fuel, but were really $1.00 windscreen washer water pumps


Goodness knows what the duty cycle is?.......how often or for what period do you pump water to wash your windscreen [of your vehicle]?


If you said 10 seconds divided by one minute ......then waited 10 minutes .........10/60/10 = 0.0166 to 1 duty cycle


So by using them in a continuous mode even for a relatively short period of time may cause a thermal issue via mechanical loading on the plastic shell bearings


I absolutely accept that the earlier European produced version may have provided superior performance, however like 1000's of other items, when production is moved to Eastern lands....they are also re-engineered via the wonders of CAD and although they may look the same externally, their internals are now manufactured to suit a planned factor of safety over the design and design life which encompasses a duty cycle...


Naturally the whole point of the exercise is to achieve a reduction in unit cost 


How many Asian or Japanese motor vehicles do you hear about requiring the windscreen washer pump replaced under warranty?

Derek


PS....Takata motor vehicle Air Bag switches may have been the exception to the rule here