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Old Feb 15, 2010, 07:13 AM
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NQD Storm Engine PX-16

Hey all,

I've got a NQD Storm Engine PX-16 and I'd like to modify it so I can make it go faster.

My aim is to get similar speed like this NQD Storm Engine PX-16;
NQD PX16 Powered by Hopf Erstfahrt (1 min 10 sec)


Any ideas on what I should do?

Also, because it's a cheap boat, I don't want to spend a fortune on it.
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Old Feb 15, 2010, 08:31 AM
nick 30
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change everything to lipo and make it single drive, double drive, double problems to go wrong

reinforce the aswell with a light layer of glass cloth inside and add flotation to the bow
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Old Feb 15, 2010, 08:35 AM
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Try to read through this...
http://www.rcgroups.com/forums/showthread.php?t=1049416
I gave up and scratchbuilt a cat... cheaper and more reliable.
With a good hardware, it could be feasible, but the hull is very thin ABS and needs reinforcing. This leads to more weight=bigger motor=more weight=.....
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Old Feb 15, 2010, 10:39 AM
Boaters are nice people.
Sneek, Netherlands.
Joined May 2004
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Quote:
Originally Posted by WyldOne View Post
My aim is to get similar speed like this NQD Storm Engine PX-16 in the video.
Also, because it's a cheap boat, I don't want to spend a fortune on it.
Hi WyldOne (got a name?),

I've read the thread on this conversion on a German forum; spending a small fortune is exactly what this boater did;
- Strip the boat completely.
- Reinforce the hull with epoxy and carbon fibre
- Adapt the running surfaces, so they allow this kind of speed.
- Use quality hardware, a proper motor ESC and Lipo's.

Like Cornel said; it's not worth the effort, for less you can get an epoxy hull that will be quicker, using the same goodies you would install in the upgraded NQD hull.

But, it's your money...

Regards, Jan.
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Old Feb 17, 2010, 09:20 AM
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Thankyou guys!

I plan on running 2xbrushless motors, but I'm unsure on what 'kv' I'm looking for. I'm after speed!

As for a rudder, should I go for a twin rudder setup or a single rudder? And what length also?
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Old Feb 17, 2010, 09:37 AM
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You're looking for around 30,000 rpm. If you go on 3S Lipo Batteries, 11V, you have 30000/11=2727kV. Anything around 2800 kV. On that size, you need some 500 series motors, or, for brushless, a diameter of 36mm. Best deal would be:
http://www.hobbyking.com/hobbycity/s...WaterCooled%29
With two:
http://www.hobbyking.com/hobbycity/s...ter_Cooled_ESC
these are cheaper than the older model on 60A...
The original hardware will not take it, so you need to go flex shaft (see offshoreelectrics for parts).
One rudder, centered, is enough, it needs to be around 100mm.
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Old Feb 18, 2010, 04:21 PM
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Thanks CornelP! Much appreciated!

Any more help would be great.
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Old Feb 18, 2010, 06:26 PM
I feel the need for speed!
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Southern U.S.
Joined Jun 2008
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Options for propulsion

Cornelps setup would be a very powerful one.........crazy speeds imo, which is not a bad thing at all, so im not knocking it by any means. I'll throw out an option here since you asked for "more help" as well. The linked 60mm motors are gonna be quite heavy.....two of them weigh in at 600 grams....the motors i will suggest will weigh in at 340 for two (9 oz. reduction). You can run these on 4s with the 90 amp esc's cornelp linked (they are the best bargain as opposed to the 60a which is limited to 3s). These motors can draw up to 50 amps so you can have up to 800 watts X 2 (1600 watts) on 4s. These motors should give you around 28,000 +/- rpms with slip.

Here is a review from a guy using these motors: "Great Motors - I use 2 of them in an Agitator Raceboat Catamaran (90cm hull). 100km/h + no problem with the right propellers for these motors.
But you have to give them a fan and a good water cooling
!!!"

Motor 2250kv x 2 https://www.hobbyking.com/hobbyking/...250kv_Inrunner

Batts x 2 - https://www.hobbyking.com/hobbyking/..._20C_Lipo_Pack
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Old Feb 23, 2010, 04:54 PM
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Thanks a million scorpion1! I really appreciate the help! Any more suggestions would be great.
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Old Feb 24, 2010, 04:08 AM
nick 30
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go single drive with a single rudder and buy a decent hull
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Old Sep 30, 2010, 08:14 AM
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G'day all,

I had forgotten about this project until I found it in the garage today and now I'm in the mood to get this baby going!

I'm a little unsure when It comes to the brushless motors. I'm not sure if I should run a twin or single setup or what size brushless motor/s I should be looking at. My aim is to get this baby swimming 80KM+ (50MPH+) on a little bit of a budget.

I have attached some images of how the hull sits at the moment. Soon I'll start cleaning it up and give it a paint or something to make it look the goods.





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Old Sep 30, 2010, 08:36 AM
I feel the need for speed!
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Southern U.S.
Joined Jun 2008
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Single is less expensive and more efficient..............even though i suggested a twin setup earlier. Try the 3660 3060kv cornelP mentioned on 3s.
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Old Sep 30, 2010, 08:37 AM
Boaters are nice people.
Sneek, Netherlands.
Joined May 2004
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Hi WO,

On a budget, a single motor set-up is the way to go.

You'll have to work on the running surfaces though to make it able to go beyond the 25 odd kph you'll be able to run without that work.

The rounded edges of the steps and transom will suck it down, make them sharp!

80 kph is very fast for a wobbly ABS hull, reinforce, reinforce, reinforce...!

Regards, Jan.
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Old Oct 01, 2010, 03:58 AM
NeverAgainVolunteerYourse lf
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Australia, QLD, Regents Park
Joined Mar 2007
3,605 Posts
NQD Admiral Cat (1 min 36 sec)


guy reinforced the hull by making a plaster cast of the inside centre of the hull, then making a reverse mould from that and making a new epoxy fibreglass skin to mount motor and rudder servo.

He did no work to the underside of the hull AFAIK

Nick
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Old Oct 01, 2010, 04:09 AM
Boaters are nice people.
Sneek, Netherlands.
Joined May 2004
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Hi Nick,

As long as the steps and transom have sharp edges, there's no need to work on the underside, but a swiss cheese like the NQD PX-16 of the TS requires some attention...

Any more info on the Admiral cat in the video?

Regards, Jan.
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