1/32 Moebius Flying Sub

[bigdave]

Maybe something like this....

WOW!
Excellent job my crazy compadre. Although I expected nothing less from you.
You never siece to amaze me George. I love the custom ducting.
You will have to show me how you did it.
What ESC's are you using?
BTW Nice Johnson.. BD

[robert f.]

Thanks for the tip, Andy! I just bought one off him (4 more available!) for a total cost of $96.90 including shipping.

So now I'm the proud owner of TWO Flying subs! Guess what my summer's project is going to be....

[JWLaRue]

Thanks, CI. Looks like a 2.5-inch OD cylinder may be a perfect fit when using LiPo's.

-Jeff

[crazy ivan]

WOW!
Excellent job my crazy compadre. Although I expected nothing less from you.
You never siece to amaze me George. I love the custom ducting.
You will have to show me how you did it.
What ESC's are you using?
BTW Nice Johnson.. BD

I'll bring it to Tonawanda next Sunday, hopefully in operational condition. Then all shall be revieled.

[PaulC]

I wannattenda Tonawanda!

[Rick Teskey]

My fs-1 uses 4 pumps 4 diodes 2 micro vipers and 1 throttle jockey mixer by Kevin McLeod and she runs well
The bottom and top Annular inlet ,I used my dremel and small drum sander too scallop between the gussets and that is enough for the pumps I use.
Rick

[bigdave]

It is a great show the Buffalo boat club puts on.
They have it at a aquatic center with a Olympic side pool.
Wish you could attend to Paul. BD

[JWLaRue]

Okay....so as to help keep (my) momentum going, can anyone tell me if one of our vendors offers 2.5-inch dive module end caps?

-tnx,
Jeff

[PaulC]

Mike's Subworks shows them on their site.

Kevin, so diodes it is then. If I'm just using two pumps for "ahead", then what diodes should I buy and how are they hooked up in the system?

CI, it seems you have built what I want! Looks great. Can you elaborate on your linkage and nozzle arrangement? Would love some detail pics.

Rick, thanks for chiming in. I'm very encouraged by your water flow confirmation. Should work for the Rule pumps too I would think.

[bigdave]

This has become a very popular thread.
So all shall be reveled huh!
Interesting. I have always wondered about Roswell.

[JWLaRue]

Thanks, Paul......will go take a look-see.

-Jeff

[crazy ivan]

Last night I decided to leave the theoretical behind and enter the empirical realm to collect some real-world data with some static testing in the laundry tub. Since I haven't installed any r/c gear yet, I ran a cable over from one of my bench power supplies, and connected it to the two turbopump modules, which were installed in the lower half of the hull. The supply was set to 7.5V, which is the designed operating voltage of the pumps.

The bottom shell containing the pumps was wide open, with no upper half installed. The assembly was immersed in the tub, and power applied. A good solid stream of water was flowing from each pump, and the thrust felt strong, as expected. The power supply registered a total current draw of right around 3 Amps for both pumps combined.

Next, the upper hull half was put on to seal things up a bit. The upper docking ring assembly was left off, leaving a 3 inch opening in the top. When power was applied, there was no observable change in flow or thrust. Current draw remained around 3 Amps. No big surprise here.

Finally, the docking ring was installed and the test was repeated. There did not appear to be any loss of flow or thrust. The current draw remained at 3 Amps, suggesting that the pumps were not being starved by any restrictions. Also, opening and closing the rear hatch had no noticeable effect.

I was curious about the amount of water the pumps were moving, so I directed the outputs into a small pail while holding the rest of the boat under water. Calculating the time to fill against the pail's volume, it worked out to right about 10.9 gal. per minute total.

The result of all this is that I can see no need to add any extra hull openings. The docking rings are providing plenty of feed water. I expect the Rule pumps will perform similarly.

[KevinMC]

Kevin, so diodes it is then. If I'm just using two pumps for "ahead", then what diodes should I buy and how are they hooked up in the system?

I'll pull a diagram together and email it to you.

[salmon]

I'll pull a diagram together and email it to you.

Or post it here and we all can learn?

[PaulC]

CI, that's very cool news. It would appear things are "go".

Kevin, that would be very much appreciated. If you email it I can post it here. Whichever is easiest for you.