ML Boatworks RSX380 Outrigger! My first FE wood kit build...

[fweasel]

Tp4060 1750kv on 6S, 250A MGM esc, ABC 1915 prop, does 90mph saw passes in my heavy tank Genesis w/o breaking a sweat. Same setup has gone 103 on 8S. Your rigger is a sports car compared to my rig, you should have no problem doing 90 on 6S with a proper setup

[sammyha]

Tp4060 1750kv on 6S, 250A MGM esc, ABC 1915 prop, does 90mph saw passes in my heavy tank Genesis w/o breaking a sweat. Same setup has gone 103 on 8S. Your rigger is a sports car compared to my rig, you should have no problem doing 90 on 6S with a proper setup

Thank you for the feedback! Just the kind of stuff I need to hear...

I wrestle back and forth with this. If I go with a 6s setup that the OSE calculator says will do X, will it in fact do it, but with overheating issues? And if I keep pushing it, am I going to eventually cook something? But I do think triple digits is possible on 6s...[emoji848]

On the other hand, I'm sure 8s will rock it. But, a little more money for the electronics and different lipos(a lot more money).

Still thinking 8s...

And, either choice will be a fun ride. Ninety would be crazy actually.

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[sammyha]

Rear shoes are framed...

Time to start on the sponsons. Seems a little daunting...

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[sammyha]

The first thing that needs done is to open the holes for the Zip Kits sponson plugs. I knew better than to drill them out. I read that some guys reamed them.

So, two concerns. Splitting the plywood and following the existing holes.

Here's how I did it...

I used this tapered grinding wheel from my Dremel kit. Perfect size.



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[sammyha]

I did not use my Dremel tool. Too high rpm's. Used my Dewalt drill motor.

Made beautiful holes, followed existing holes nicely, slightly tight. Ran the tip of the tapered grinding wheel around the inside to open them up a bit.


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[sammyha]

Here's the answer to something I was wondering about. How to build the sponsons flat on a board if you have to install the sponson plugs first?

There is room inside the framework to back them up while building the sponsons...

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[sammyha]

Progressing nicely. The sponsons are just dry fit in this picture...

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[sammyha]

Lotsa glue joints. I tacked it with CA, then made about a million small mixes of epoxy. Applying it with a small screwdriver. Fun, fun... Really!

Keeping the sponson plugs engaged during the build and cure...

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[sammyha]

Second sponson on the board. More epoxy mixes... [emoji41]

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[sammyha]

I was reading about strut angle in a thread(JAE Builds). They were talking about positive vs negative angle. There were differing opinions given in that thread to the point that they agreed to disagree...

I too have referred to this in my Pro Boat UL-19 thread. I've referred to the front of the strut higher as being negative angle. It's actually a positive angle of attack.

I referred to the front of the strut being higher as negative angle because this is a negative trim angle(for the boat).

So what is the correct terminology?

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[fweasel]

Trim angle is relative to the keel or ride surface of the hull. When the rear of prop is angled up and the front of the strut is down, this is called positive trim. When the rear of the prop is angled down and the front of the strut is up, this is negative trim.

[sammyha]

So you refer to strut trim angle. Not just strut angle. That makes sense.

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[sammyha]

When I ordered the ML RSX380 kit I also bought the 5/16" carbon boom tubes, sleeves and clamps. Total- $213.40

And fresh epoxy and carbon fiber cloth. Total- $33.98

The minimum I figured I would need to start the build.

I have also picked up a Spektrum DX5R radio with a SR6000T receiver. Total- $249.99

Bear in mind I'm a newcomer to RC boats taking on an advanced level, high performance build. Without being in a club to ask other members the endless questions that come up.

I've been researching to figure what I needed for electronics and hardware. Here on the forum and on the OSE website. And have gotten great feedback from the members here...

I felt like I was ready to take the plunge. Make the hard decisions on some expensive components.

I said this build thread would be from a newcomers perspective. I share this for those in the same shoes who want more than what RTR's can offer.

Here's a list of what I ordered from OSE to finish the kit. You can search the SKU numbers on OSE's website...


NOTE: LIST HAS BEEN EDITED DUE TO A FEW INCORRECT I CHOICES MADE AT THE TIME I PUT IN MY INITIAL ORDER.

I WILL ALSO CONTINUE TO UPDATE THIS LIST DURING MY BUILD TO HAVE A MORE COMPLETE AND ACCURATE LIST IN ONE LOCATION.


Leopard 4092 Motor winds/rpm 1390Kv 2Y SKU: leo-4092 Qty: 1 FREE Water Jacket! Pick Size? Leo 4068 Jacket(40mmX68mm long) $94.95

Carbon Fiber Battery Trays SKU: ose-80525 Qty: 2 Length: Carbon Fiber Battery Tray 200mm $21.98

Fully adjustable 40mm diameter motor mount with carbon stands. SKU: tfl-523b63 Qty: 1 color of metal parts: Silver color mount & motor ring pn# tfl-523b63-S $29.95

OSE Extra Large 9/32" Silicone Tubing SKU: ose-tubing-9/32-clear Qty: 1 length: 6 foot piece $6.98

OSE Large T Fitting SKU: ose-lrg-tee Qty: 1 Color: Black pn# ose-lrg-t-B $1.95

Aluminum grommet for tubing SKU: tfl-alu-gro Qty: 1 Aluminum Grommet: tfl-522b40-6.8 $2.55

AeroMarine collet style couplers SKU: aero-coupler Qty: 1 size: 5mm to .187 $15.95

Flex cable saver SKU: ose-80072 Qty: 1 size: 187 Cable Saver pn# ose-80072-18 $2.95

OSE .187 (3/16") cable with 3/16" prop shaft 3.125" long SKU: ose-1190 Qty: 1 OSE .187 length: 24" assembly $25.99

K&S Brass Tubing SKU: dh-ks-brass-tb Qty: 1 tubing size: pn#8131 : 1/4" Diameter $2.24

K&S Brass Tubing SKU: dh-ks-brass-tb Qty: 1 tubing size: pn#8134 : 11/32" Diameter $2.74

ABC 10-50 Series 2 Blade Clever Propeller, 2.0" to 2.6" SKU: abc-XXXX-10-50(2)CLL-2 Qty: 1 Diameter/Pitch: 2216-10-50(2) CLL $21.95

ABC 10-50 Series 2 Blade Clever Propeller, 2.0" to 2.6" SKU: abc-XXXX-10-50(2)CLL-2 Qty: 1 Diameter/Pitch: 2118-10-50(2) CLL $21.95

Speedmaster Large 3/16" (.187) Strut SKU: ros-spds-007 Qty: 1 Strut Style: SPDS-007-187HR .187 Hydro : Round Bottom777 $29.95

Speedmaster 21 Rudder Assembly 5.25" Long SKU: ros-spdr-001 Qty: 1 Rudder Style: Hydro Rudder 1.50" Setback $39.95

NEW Swordfish X+ 200A ESC with Data Logging : 2s-8s lipo ESC SKU: hef-HBX1200L Qty: 1 $179.95

EC5 Battery Series Harness, 10 AWG SKU: hh-DYNC0028 Qty: 1 $9.99

Castle Creations CC BEC 2.0 BEC WP Voltage Regulator SKU: cas-010-0153-00 Qty: 1 $39.99

OSE 5.5mm Gold Plated Bullet Connectors SKU: ose-55mm-bullet Qty: 3 $5.97

EC5 Male Connector SKU: ose-ec5-M Qty: 1 $1.99

5mm Thrust Bearing SKU: dh-53136 Qty: 1 $7.99

Esc mount 124mm x 76mm SKU: mbp-cnc5088 Qty: 1 $18.99

OSE Aluminum Large Water Outlet SKU: ose-80905 Qty: 2 $5.90


3/16 (4.75mm) Stainless Steel Drive Dog : 8mm Diameter SKU: tfl-518b22 Qty: 1 $2.95

Octura Brass Bullet Nut for 3/16" shaft SKU: oct-oc6pnmm Qty: 1 $2.99

Radio box grommet and boots XL SKU: ose-80249-xL Qty: 1 $6.25

Du-bro Swivel Ball Link 4-40 w/Hardware SKU: dh-497 Qty: 1 $1.85

Great Planes 4-40 Linkage Rod SKU: dh-4-40-3753 Qty: 1 $1.60

Linkage Rod Connector for 4-40 Rod SKU: ose-83106 Qty: 1 $2.49

Antenna Mounting Bracket for Transom SKU: aero-6030 Qty: 1 $1.89

AeroMarine Antenna Tube & Mount SKU: aero-6028 Qty: 1 $3.95

Servo Mounting Standard Size SKU: tfl-524b25-s Qty: 1 $11.95

Roll of Hatch Tape SKU: hatch-tape Qty: 1 $2.95

Octura 3/16" Shaft Thrust Washers(10 pack) SKU: oct-oc6twmm Qty: 1 $2.50

Total for this order- $634.17(UPDATED)

This should be almost everything needed to complete the kit, minus steering servo & turn fin that I'm buying elsewhere. Total- $116.99

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[sammyha]

First of all... that's a big list!

And expensive!

This could be done for less with a 6s setup. Not that much less tho.

But I wanted a top end rigger. No buyers remorse. No, "I wish I would have went with..."

There will also be a few more odds & ends to buy. Canopy latches, paint, battery straps etc...

Finally, there is no way I could put that together without the OSE website, along with their speed calculator and this forum. So a big thank you for that!

It should drive like a Maserati on water too!

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[sammyha]

$1,273.83 is the grand total! Including the radio...

So why did I post that list?

1) Well, I lived it for a few weeks. I mean the research part. It really is a steep learning curve.

2) I think it's pretty comprehensive too. There's a list for the RSX380 on this thread here(but it was not completed)...

http://forums.offshoreelectrics.com/...ad.php?t=59173


3) Someone could copy the SKU numbers, paste them in the search engine on OSE's website and click buy. It works, I tried it. And order up a complete kit. Just adjust the list with their choice of motor, esc and prop, right? That would be my ultimate reason for doing it.

4) Maybe OSE gets some more business... [emoji41]


If you study the setup, this should run 84mph laps on 1390kv, 6s lipos and a 2118 prop. Or run 87mph laps on 8s with a 2114 prop(wasn't on the list). And then crank up some 105mph SAW runs on 8s with a 2216 prop! That all should be doable. Maybe a great 6s/8s combo?

I'd love to get some feedback on this. Either way I'll find out for myself when I put it in the water.

So hopefully my research is good for an all around setup for both. Without concerns of cooking anything. I'm listening and trying to understand this. And I'd like to think this is predictable too. I plugged the numbers in the calculator for my UL-19 and it came out surprisingly close to the real life results(73mph on the calculator). I plugged in 80% efficiency for the motor tho(not buying their 92% claim).

I will post on how this turns out.

After I mix a lot more epoxy of course!

In the meantime, back to the board...

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