Today's work on the little Revell SKIPJACK fittings kit

[Kazzer]

Good grief! The ESC is a special for us but similar to the Mtronics Micro Viper. and rated for the motor. Merriman has worked all this out. The system is 'cast in stone'.

[Subculture]

A small can mabuchi type motor, 180 or therabouts. I'd be surprised if it's over 20 watts.

You just aren't going to need wads of power to push an efficient little model like that through the wet stuff.

[Subculture]

Experience.

[Subculture]

I was being facetious. The 4 A is more than up to the job.

[Subculture]

Good grief you are the limit, 4 A rating is more than enough for any small model, it's 60 watts at 12 volts for Pete's sake. Just how much power do you need!

If you look at the other pages on that site, you'll see they also do a 15A version for larger models, and it's only a bit bigger.

If an ESC has just two wires for the motor (like these) they're designed for a brushed DC motor.

[Subculture]

No not really.

http://www.hobby-lobby-modellbau.com/onlineshop/product_info.php/info/p2967_Speed-Control-micro---4A---f-r-.html/XTCsid/ebe3431241bcbeeed0f6ad6a4fe4837c

[redboat219]

Can you tell us more about that nano ESC.

[Subculture]

So no hull kit only then?

i.e.-


1 Aft Motor Bulkhead with motor
Motor Drive Shaft Connector tube
Aft Dry Space Cylinder
Servo Room
Forward Dry Space Cylinder
Forward End-cap
2 Magnetic Servo Couplers
2 Push-rods
Ballast Weights & Foam
Revell Model
1 x Fittings Kit

[Kazzer]

Here is the Kit form Revell Skipjack Sub-driver.

1 Aft Motor Bulkhead with motor
Motor Drive Shaft Connector tube
Aft Dry Space Cylinder
Servo Room
Forward Dry Space Cylinder
Forward End-cap
2 Micro Servos
2 Magnetic Servo Couplers
2 Push-rods
1 x Nano Speed Controller
1 x ADF Pitch Controller and Failsafe
Ballast Weights & Foam
Revell Model
1 x Fittings Kit

Price $249.00

Accessories Kit
1 x Nano Receiver with crystal
1 x LiPo Guard Battery Saver
1 x 800 Mah LiPo Battery
1 x Battery Charger
$120.00

Assembled Unit with everything installed Price TBA

To order, please pm or email me.

[He Who Shall Not Be Named]

OK, here are the final shots of the commercially available little SKIPJACK fittings kit and SubDriver. Each is available separately. I've given Mr. Caswell my price and he'll work up the retail price and have these things in the catalog soon.

Get 'em while they're hot.

I've provided a photo showing the difference between the stock built-up kit and one modified with our fittings kit.

The Revell little SKIPJACK kit is sold separately.

David,

[toppack]

Ah yes, that's the assembly I saw. I forgot that it had exposed onboard servo parts.
It is a small assembly and should work okay in Low-torque applications.

[Subculture]

Also, Spektrum now have a cheap little linear servo for very small applications

http://www.spektrumrc.com/Products/Default.aspx?ProdID=SPMAS2000

[Subculture]

Here we go. it's designed for flyers, but you can insert a surface crystal in it and it'll work fine. this works with 35mhz (our flying band) to 40mhz (or surface band), so I'm pretty confident this will work with 72 to 75MHZ.

It's a top bit of kit, the servos are something else, as they don't use pots for feedback, they use linear hall effect sensors- no pots to wear out and or get scratchy! The servos torque isn't massive, but should suffice, especially if you use magnetic couplers.

The receiver is a 4-channel job.

http://www.falconmodels.uk.com/acatalog/Radio_Equipment.html

Falcon Breeze Block now with DSP & Fail Safe

The Digital Signal Processing function ensures only clean signals reach the servos. If after approx. 1-2 seconds no good signals are received, the fail safe function will be activated. The Fail Safe function remembers the Tx stick positions on power up eg, throttle closed, controls neutral. Tx on first then switch on Rx. To test fail safe, throttle up , control sticks full travel, swtich off Tx, neutral controls, motor cuts.
Designed to make installation easy for micro radio controlled models - Includes 2 Falcon digital servos and the New Falcon Receiver all on one board. ONLY 4.8g complete with crystal and designed to operate between 3 and 5v. Example: 1 Li-poly cell directly connected for gliders, or through the Falcon single cell ESC for powered models. Alternatively for 2 Li-poly cells, through the 5v BEC function of an ESC. 120metres range on only a 20cm (8") Rx aerial. The aerial can be extended for greater range.

Dimensions:
length 36mm
width 24mm
height 10mm

[toppack]

We have a little radio board available over here called the 'breezeblock'. This is so small it could easily fit in the stern of the cylinder freeing up space and permitting the use of a ballast system.

I've seen pictures of a micro-receiver called a 'freezeblock', somewhere on internet.
It was a circuit-board with no enclosure box and connector pins at end of board, (similar to other modern micro-receivers). I think it had only 4 channels for servos, tho?
I think it was FM.
I'll try to locate it again.

[He Who Shall Not Be Named]

Dave, is this going to be made available as a complete kit, or will you sell the hull parts as a Skipjack 'hop-up' package. Also, it might be useful if just the endcaps and cylinder were available for those wishing to grow their own internals.

We have a little radio board available over here called the 'breezeblock'. This is so small it could easily fit in the stern of the cylinder freeing up space and permitting the use of a ballast system.

Damn timely post, Andy. I was just finishing up the cost projections of the little SKIPJACK fittings kit and SubDriver for Mr. Caswell.

To address your first paragraph: No, we will split the fittings kit and the SD as two separate items for sale. Of course, those wishing to r/c the little SKIPJACK will be compelled to buy both the fittings kit and the SD.

The fittings kit will be sold separately for those wishing to enhance and make more scale like the Revell kit for static display.

And your second point is addressed here: The 'basic' little SKIPJACK SD is devoid of all devices save the installed motor (with watertight seal and spark-suppression made up) -- it's up to the customer to work out the internals. Caswell will work up a 'package' of the internals needed or the customer can come up with his own. Choices, Andy.

If you would please share with Mr. Caswell and me the technical specifications and source of the little receiver you mentioned -- if it is frequency compatible with our FCC it would be the perfect companion for this (and other small plastic model submarine kits) product. Yes, we might be able to but a LPB system in this thing if we can minimize to a significant degree the size of the receiver. Tests have shown a practical 90 minute-run time with the 800mAh pack, a shorter LiPo battery of, say, 400mAh would still give a good run time and would free up additional real-estate for the ballast system -- yes, a possibility, Andy.

David,