RE: NQD Hydro
 

its cool that you guys are trying new stuff [sm=thumbup.gif]

I have not realy touched mine since I posted last time....so no news from here ;)

RE: NQD Hydro
 

Hiii...

Some questions for Moppie...I look at the pics that show the circuit board and the servo..are you using the circuit board connected to the servo? If yes, how do you do that..'coz that's what i was trying to do but still not done yet..hehee..
Hope u can help on this...

That day i tried using the 8.4V 1800mah battry on my boat and it run well and quite fast from the 7.2V 1800mah battery..better speed from last time...

Thanks

RE: NQD Hydro
 

I don't quite understand what you mean. Surface area, yes I can understand why it would help but at the same time it will dramastically increase drag at top speed, reducing efficiency/consuming power/energy. Most of the fast boats have extremely little surface area to help get on plane.

I have never seen a boat ride on air like a plane. All boats I have seen, skim across the water. Same idea, completely different principle.

Weight has a rather large effect on getting a boat up on plane because it consumes too much power.
Even though the boat does not weigh less when planing, the water resistance at high speeds keeps it on top of the water. It does not have anything to do with air/air pressure. When the speed of the boat is slow enough to let the water move away, the boat is no longer planning.

In conclusion, I would recommend increasing the power of your boat instead of adding more planning surface area.

Ryan

RE: NQD Hydro
 

The circuit board shown is the original one that failed. I thought you might be interested to see what came out. I have no idea how to hook this up, sorry..As soon as I have the new stuff in I'll put a few more pictures up.
I also just prrchased another set of batteries
3000mAh Capacity Nickel Metal Hydride.
No cell memory, you can recharge the pack without fully discharging!
Dimensions : 5.3"x1.87'x0.97" inch.
Voltage: 7.2V
Connector: Standard Tamiya.
Maximum 35 Amp discharge rate.
Specially design for RC Racing Vehicles.
Will work with HPI and all other standard 7.2V vehicles.

27.95 USD including shipping on e-bay (includes 2 x)

RE: NQD Hydro
 

Here are some pictures of the control upgrade. I'm trying to keep the weight down as much as possible..
If you install a servo, be careful about the glue you use.
So here is where I'm at:
> Race 480 motors (fit the exact same location):D
> Servo steering.
> Upgrades props (45 mm dia) with lots of pitch...[8D]
> Battery... I can go to the 8.4 volts and still secure it in the same location (weight --)
> Center of Gravity... Should be close to stock.

Now the real question, Can I match SJN Speed with a 700 and 12 cells? You only had one prop...
VDI to follow...

I appreciated the comments about surface area in the previous thread.. drag vs lift, not sure who is correct. My feeling is weight is a big factor.. Maybe my approach will help..

RE: NQD Hydro
 

Did it smoke when you removed the cover with the 8.4 volts?? Mine sure did[:@]

RE: NQD Hydro
 

Mine does not smoke when i removed the cover..everything still OK...that's mean my boat can accept the 8.4v battery...

After this i wanna try to use the 8.4v battery on my other NQD boat as below...hope it won't burnt the circuit board...

RE: NQD Hydro
 

My Boss has this other boat you were asking about. His is called the "flying fish" or something liek that. Its running twin 550's stock and has a 12v NiCd battery. No issues on his at all. Actually hauls a good bit of ***** for a stock boat!

RE: NQD Hydro
 

How do you wire the Motors Up Using one ESC.?? I want to Stick with 7.2 Volts and Run a Twin Motor Set up with one ESC and a Rudder?

I have a No limit ESC so A wiring Diagram from Reciever to ESC to Both Motors would be sweet..

RE: NQD Hydro
 

Wire them in parallel so each motor gets maximum amount of voltage. ESC to receiver is a no brainer.

Parallel Wiring Diagram: Stolen from another post

Ryan

RE: NQD Hydro
 

ryan_t888


Your a Life Saver !

Now How do I go about Getting a Rudder and Rudder mount Done? and then Connecting it to the Servo?

RE: NQD Hydro
 

Look/search on www.towerhobbies.com to find what you are looking for. (rudder/mount/pushrods) Then go to your LHS to find something similar, or order off of Tower.

Once you have the mount, rudder and pushrods needed, you can start mounting the rudder and servo. Then install a pushrod to connect the two.

Ryan

RE: NQD Hydro
 

hi guys
i am new to boating and forums so bare with me. I have also got a nqd hydro with plans to modify.
it shares the concept with moppie, where i am going to use two 480's in stock location one fwd and one rev, controlling them with a old novak duster 2 i got laying around from a car, and a turn fin donated by a buddy from one of his boats.
also need a opinion what props to use i dont know if a 45 will be to much for the 480s.
and for power i am thinking about using my 3s 11.1v lipos out a heli but i dont know how the unstable *******s will react to moisture.
if i can figure out how to post pics i a several of my progress so i little help please

RE: NQD Hydro
 

it sure did smoke.. But it ran in this condition. I'm sure 8.4v is at the very limit. I bet if you installed larger motors with the 8.4v I bet you smoke the controller.

I did run a 7.2v 3000mah without any problems..

RE: NQD Hydro
 

hi guys

also need a opinion what props to use i dont know if a 45 will be to much for the 480s. [/quote]

If you go to 45mm be carefull about the clearance. The 40mm I have on just clear..

RE: NQD Hydro
 

A 45mm prop(42mm for sub-submerged drive) is just perfect for my 700 series motor. I would imagine a ~38-40mm would be more suited for the 400series motors.

Ryan

RE: NQD Hydro
 

NQD... Closing another chapter!

I'm coming close to the end of my NQD Book.. If you look back to the beginning of this thread there have been a few others that have already done this...been there.. i.e., the need for speed. And they have done a great job[sm=thumbup.gif]

So the question is, without puting 12 cells in, a 700 motor, ESC system, what is possible?? My gaol was was less than $100 USD.

I have always been on the opinion that weight is the big obstacle.. Weight can be over come by sheer power (700 motor) and once the boat in up on plane the 700 just takes off.... So not a bad idea..
My approach was:
The original props are not the best selection. Nor- are the motors. Along the way I found the limits of the NQD control system (8.4v).
I also learned that the steering system is crap because as soon a you enter a turn you slow down..

I've thrown in a few pictures for those who can use the information. I'm going to package this and that's all. I will., for sure take, a few VID so you can make your conclusion as to what to do...

Good Luck.[sm=rolleyes.gif]

RE: NQD Hydro
 

Thanks Moppie. I have my hobby buddy coming over tomorrow to peruse this forum thread specifically for photos. We're going to go with the 700 motor route a new ESC, prop, rudder, transmitter, the works. It's not the cheapest route but I would rather have a $350 version of the NQD that goes as fast as it looks like it should as opposed to having the NQD version that makes for a great dust collector. :)

RE: NQD Hydro
 

When it hits the water I'll let you know... Good luck on you end..

RE: NQD Hydro
 

thats a lkot of wire , alto of wire = voltage lose and resistance ,
if i were you i would cut the wires back to 3 inchs or les !

RE: NQD Hydro
 

I am building a twin 550s reduction belt drive system.
the 550s run at 22,000rpm at 8.4v
the reduction drive is down to 1:4 and should produce tons of torque to a single 50-55 prop.

will post pictures in a few days of the progress.

RE: NQD Hydro
 

Interesting

Ryan

RE: NQD Hydro
 

Here are some pictures of the packaged goods.. Sorry, I did not run the boat over the weekend.
Not sure I agree on the 3 inch.. I have good wire gauge and good solder..

RE: NQD Hydro
 

I hit the H2O today with the new set up.. Not very happy with the results [&o]. It seems that the 45mm props are just to big for the 480 motors to turn with any speed. But at the same time the batteries seemed to be on the low side.

Next Steps...Fully charges batteries through the cycle charger.. Hit the water..Then change the props to 40mm, then to 35 mm..if necessary.

RE: NQD Hydro
 

Well, I hate to admit it but I've decided after careful consideration to forget spending the money to upgrade the NQD hydro. Between hearing the trials and errors and the fact that I bought a 1/12 Miss Bud nitro AND I'm having a 1/8 scale 1982 Miss Pay N Pak built, I just don't have the money to upgrade this boat. So what I am going to do is just use it as a rescue boat for my other hydros.

It can put put itself out to save my gas hydros when or if they get stranded.