Unofficial "NQD" Tear into Jetboat Thread
11-29-2011, 06:05 AM
#2427
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RE: Unofficial
ORIGINAL: Stein
By looking at it on Google I would say as stock its would be very slow. You would have to rip all the stock stuff out and spend about $150 - $200 for brush less setup for this to make it work good.
ORIGINAL: Big_jim_aus
[img][/img]
http://www.ebay.com.au/itm/400249641...84.m1497.l2649
[img][/img]
New Lightning Water 50cm Rc Jet Aero Boat
[/b]Has anyone tried one of these they look similar but are a little longer I'm in Australia and can get this delivered for $53.http://www.ebay.com.au/itm/400249641...84.m1497.l2649
http://www.youtube.com/user/dragonfi...16/S16V0SZdrtg
http://www.youtube.com/user/dragonfi...15/7miooKDTybM
http://www.youtube.com/user/dragonfi...13/a-MmplBQ_zY
11-29-2011, 02:36 PM
#2428
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RE: Unofficial
cheers for the info will steal the drive for a differnt hull i have an original jet sprint to but it has bin sitting for a few years and the coupling is seased on the shaft. This is going to be interesting. Will try to keep you guys updated with how i go.
12-02-2011, 12:15 AM
#2429
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RE: Unofficial
heres a quick vid of 1st test run of 1st tear into ive done.
turnigy 3900kv 28mm motor birdie 50 amp esc 2s 2200mah nano
[youtube]http://www.youtube.com/watch?v=eTEhEeQqiQo[/youtube]
got another one to do and got this motor on the way to try in it
http://www.hobbyking.com/hobbyking/s...dProduct=17152
later
turnigy 3900kv 28mm motor birdie 50 amp esc 2s 2200mah nano
[youtube]http://www.youtube.com/watch?v=eTEhEeQqiQo[/youtube]
got another one to do and got this motor on the way to try in it
http://www.hobbyking.com/hobbyking/s...dProduct=17152
later
12-11-2011, 05:24 AM
#2430
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RE: Unofficial
Hi all.
thought i would post up the video of my maiden voyage.
im fairly happy with the performance, a little dissapointed with the run time though.
i only got about 4 minutes before the ESC cut to half throttle and the fun was over.
im going to go buy a few more batteries so i can get a bit more run time.
might look at paralleling 2 packs to double the run time.
might just stick to the single packs to keep the weight down.
boat handles great, no issue with picking up prime after loosing it
(only lost prime a couple times when i spun out)
specs are as follows.
4800KV brushles in-runner with water cooling jacket
35A Turnigy marine ESC, also water cooled
brass sleeve mod on the jet drive
Turnigy Nanotech 2200 2S battery. 35C , 70C burst
both motor and ESC were cool to the touch after the run.
the battery was fairly warm, but not so hot that you couldn't hold onto it.
anyway, here's the video.
i haven't painted the boat yet, still tying to work out what colour scheme i want to go with.
[youtube]http://www.youtube.com/watch?v=EYq6pXUWAvc[/youtube]
Jason.
thought i would post up the video of my maiden voyage.
im fairly happy with the performance, a little dissapointed with the run time though.
i only got about 4 minutes before the ESC cut to half throttle and the fun was over.
im going to go buy a few more batteries so i can get a bit more run time.
might look at paralleling 2 packs to double the run time.
might just stick to the single packs to keep the weight down.
boat handles great, no issue with picking up prime after loosing it
(only lost prime a couple times when i spun out)
specs are as follows.
4800KV brushles in-runner with water cooling jacket
35A Turnigy marine ESC, also water cooled
brass sleeve mod on the jet drive
Turnigy Nanotech 2200 2S battery. 35C , 70C burst
both motor and ESC were cool to the touch after the run.
the battery was fairly warm, but not so hot that you couldn't hold onto it.
anyway, here's the video.
i haven't painted the boat yet, still tying to work out what colour scheme i want to go with.
[youtube]http://www.youtube.com/watch?v=EYq6pXUWAvc[/youtube]
Jason.
01-12-2012, 03:12 PM
#2435
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RE: Unofficial
whoa! Sooo much information, I finally made it through all 98 pages 
I've gone to eBay and bought one of these little boats, AU$60 delivered from the Gold Coast, can't go wrong with that
The boat should arrive next week I'd assume, so then I'll be tearing it apart and putting some new gear in it 
With all the information I've read, it seems that you can either go 2S or 3S, as for speed they seem much the same, but what is the advantage of 3S over 2S??
01-12-2012, 07:46 PM
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RE: Unofficial
I think that in smaller boats such as this the advantage is small, but the higher voltage will require less amps to do the same work. This allows the motor, esc and lipo to run cooler and more efficiently. There have been many reports of the high kv motors (2S) crapping out, (happens quicker on 3S), with few 3S/lower kv rigs failing. We're talking about 20mm motors. If you want a significant advantage go to a larger motor such as a 24mm or 28mm. You will be taxing this size motor much less, and will get better results. Again the 3S has the advantage, but the advantage may be smaller.
01-12-2012, 10:18 PM
#2437
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RE: Unofficial
Sundogz, thanks for your input
From memory the 24mm and 28mm doesn't fit the NQD drive without some modifications, is that right?
Also, those amazing new after-market parts from Thailand, what did they end up costing? If the seller notices this message, please PM me a price to Australia for those parts (cavitation plate, CNCed aluminium jet drive extender etc)
Cheers
Martin
01-13-2012, 06:11 AM
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RE: Unofficial
[quote]ORIGINAL: seehuusen
Sundogz, thanks for your input
From memory the 24mm and 28mm doesn't fit the NQD drive without some modifications, is that right?
If anything, you might have to open up or elongate the mounting holes is all.
If anything, you might have to open up or elongate the mounting holes is all.
01-15-2012, 08:46 PM
#2439
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RE: Unofficial
Sundogz, cheers for confirming that :-)
OK guys, I've made the list of stuff to buy to get this beast up and running. I bought the boat for $59 delivered, and it's on the way
Radio Gear
($65.95)re"> FS-GT3B 2.4Ghz 3ch Transmitter (with 1 receiver) (www.ebay.com.au/itm/400241504107)
($20.01)re"> TRAXXAS REVO 3.3 SUMMIT 1/10 MICRO WATERPROOF (www.ebay.com.au/itm/110806809143)
Motor
($44.03)re"> Leopard 2445/3400KV Inrunner Brushless (24mm motor) (www.ebay.com.au/itm/150673363831)
($ 5.00)re"> I can't find a Cooling jacket, so I'll have to make one from some aluminium tube as described earlier
ESC
Here I'm a bit uncertain, do I got bigger or is 35 amp plenty?
*($37.01)re"> HOBBYWING Seaking-35A Brushless (www.ebay.com.au/itm/270870743629)
*($71.99)re"> HOBBYWING SEAKING 90A Water Cool Ship Brushless (www.ebay.com.au/itm/110769658902)
Battery
wow there's a lot to choose from, but I like experimenting :-)
To start off with, I was just going to get a 2 or 3 cheapo batteries, perhaps more and better as time passes by
(~$10)re"> 11.1V 2200mAh 30C 3S Lipo Rechargeable Battery (www.ebay.com.au/itm/270890566462)
I was thinking to just get this littlecharger, but I'm open to suggestions
($28.92)re"> Turnigy 2S/3S Lipo Charger/Balancer with Power Source (www.ebay.com.au/itm/330608850909)
Total is about AU$221 for the lipo/brushless setup including new transmitter and receiver,
I'm very keen on hearing some input on the choices as well as suggestions
Cheers
Martin
01-16-2012, 04:55 AM
#2440
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RE: Unofficial
@seehuusen
im using the seaking 35A ESC in mine, and it's just about perfect.
runs very cool. im running 2S with the 4800kv watercooled brushless motor.
both the motor and esc are cool to the touch after a run.
battery is a little warm though.
im running turnigy nanotech 2200 2S packs in the boat.
get about 5 minutes off each pack.
i just got a few more of the same battery, and im going to try running two packs
in parallel to give me longer run times, and better life on the batteries.
running two packs should also help with keeping the battery cooler too.
im running the same radio as the one that you bought.
it's a great radio for the money.
also, im using a traxxas slash waterproof receiver box for the RX in the boat.
another thing.
that charger that you linked to is going to be very very slow to charge the batteries.
it will take just under 3 hours to charge one 2200 battery.
so 3hrs charge time, for about 5-6 minutes run time.
i would look at the accucell charger with a 5A power supply.
plenty of them on ebay, and cheap enough too.
they are a good entry level charger.
you will be able to charge a 2200 battery in about 30 minutes.
Jason.
im using the seaking 35A ESC in mine, and it's just about perfect.
runs very cool. im running 2S with the 4800kv watercooled brushless motor.
both the motor and esc are cool to the touch after a run.
battery is a little warm though.
im running turnigy nanotech 2200 2S packs in the boat.
get about 5 minutes off each pack.
i just got a few more of the same battery, and im going to try running two packs
in parallel to give me longer run times, and better life on the batteries.
running two packs should also help with keeping the battery cooler too.
im running the same radio as the one that you bought.
it's a great radio for the money.
also, im using a traxxas slash waterproof receiver box for the RX in the boat.
another thing.
that charger that you linked to is going to be very very slow to charge the batteries.
it will take just under 3 hours to charge one 2200 battery.
so 3hrs charge time, for about 5-6 minutes run time.
i would look at the accucell charger with a 5A power supply.
plenty of them on ebay, and cheap enough too.
they are a good entry level charger.
you will be able to charge a 2200 battery in about 30 minutes.
Jason.
01-16-2012, 08:08 AM
#2441
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RE: Unofficial
Seehousen, one thing I would change is to use a mini or a regular (full) size servo because the micros aren't dependable in this boat. They are doing more work than you might think. You can use up to a 5000mah lipo without much of a weight penalty if long runtimes are important.
01-16-2012, 04:30 PM
#2442
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RE: Unofficial
Thanks guys!!
I was thinking of going 2S setup, but I'm uncertain about what motor to get, as I could only find this one, Hobbywing SEAKING 4800KV Brushless Motor Water-cooling (www.ebay.com.au/itm/140419435689) which is a direct fit, but I was hoping for a bit bigger motor for reliability as Sundogz mentioned above... Pricewise the whole setup would be about the same for 3s over 2s, so I'd prefer the superior setup if the price is much the same
Anyone of you guys using Hobbyking in Australia? Apparently there's a warehouse in NSW??
Anyone of you guys using Hobbyking in Australia? Apparently there's a warehouse in NSW??
I'm really happy to hear that someone else have the same radio, makes me feel confident about buying this one, as it's a pretty cheap sorta deal 
So a servo like this one might be a better choice?
HPI E Firestorm 10T Flux hpi sf-10W waterproof servo
Cheers
Martin
01-16-2012, 06:02 PM
#2443
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RE: Unofficial
been using the same radio for about a year now.
there's a 200 page thread on the radio (and the mods that can be done to it)
over on RCtech.
im using the 4800kv motor that you mentioned.
so far no issues with reliability. i think the failures have been from those running 3S with it.
and i figure, if it does fail, it's cheap enough to replace.
have ordered a bucket load of stuff from HobbyKing. (im in Sydney)
though nothing from their NSW warehouse yet. i think they are still setting it up,
and haven't got a huge range of stock yet.
as for the steering servo, im using a micro in my boat, but as sundogz said,
there are people that have had them fail. if mine does fail, im going to try a
high torque micro servo with a metal gear train.
Jason.
there's a 200 page thread on the radio (and the mods that can be done to it)
over on RCtech.
im using the 4800kv motor that you mentioned.
so far no issues with reliability. i think the failures have been from those running 3S with it.
and i figure, if it does fail, it's cheap enough to replace.
have ordered a bucket load of stuff from HobbyKing. (im in Sydney)
though nothing from their NSW warehouse yet. i think they are still setting it up,
and haven't got a huge range of stock yet.
as for the steering servo, im using a micro in my boat, but as sundogz said,
there are people that have had them fail. if mine does fail, im going to try a
high torque micro servo with a metal gear train.
Jason.
01-16-2012, 06:29 PM
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RE: Unofficial
Yes, that servo would be fine if it comes with the control arm (servo horn) to use it. Ratrunner, the 4800 is fine on 2S if it's used with a water jacket. The only issue is they tend to hit top speed somewhere around 75% throttle, after that it is just making more noise, but (the boat) not actually going faster. A 24 or 28mm will break through that (thrust) barrier and allow faster boat speeds.
01-16-2012, 08:21 PM
#2445
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RE: Unofficial
I have noticed the more noise, no extra speed with that motor.
I'm going to set my endpoint on the throttle ch to limit the last 25% or so of throttle.
Jason.
I'm going to set my endpoint on the throttle ch to limit the last 25% or so of throttle.
Jason.
01-16-2012, 09:32 PM
#2446
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RE: Unofficial
SUNDOGZ:You should be looking for 30K rpm's (tops) in this boat, whatever combination of volts and KV's you want to use to do it. Remember to figure in losses due to efficiencies (I have always used a conservative 80% multiplier). So at 11.1v (3s) if you go with a 3200kv that would be 3200x11.1=35,520x80%=284160 which is in line. Actually very good. If you push that envelope too far, you will increase noise and heat but not speed.
I finally found that quote on how many RPMs is ultimate I've found a possible candidate for a bigger motor in a 2S, HOBBYWING Seaking B28 3900Kv Brushless Motor (www.ebay.com.au/itm/HOBBYWING-Seaking-B28-3900Kv-Brushless-Motor-BL143-/280614516731)
What do you reckon of the 3900 on 2S (3900rpm x 7.4v x 80% = 23088rpms) is it too few RPMs??
I actually think I'll go with a 2s setup using the smaller 20mm motor, and upgrade to the 28mm with the right KV setting if necessary, time to place some orders, and chase up my boat as well
I've found a possible candidate for a bigger motor in a 2S, HOBBYWING Seaking B28 3900Kv Brushless Motor (www.ebay.com.au/itm/HOBBYWING-Seaking-B28-3900Kv-Brushless-Motor-BL143-/280614516731)What do you reckon of the 3900 on 2S (3900rpm x 7.4v x 80% = 23088rpms) is it too few RPMs??
I actually think I'll go with a 2s setup using the smaller 20mm motor, and upgrade to the 28mm with the right KV setting if necessary, time to place some orders, and chase up my boat as well
Cheers
Martin
Martin
01-16-2012, 10:05 PM
#2447
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RE: Unofficial
Yes, that info is still valid, but just remember it was in reference to 20mm motors. The smaller 20mm motors are limited by the amount of torque they can produce. The larger (24mm, 28mm) motors can be pushed to higher rpms because they have more torque. That 3900kv HK motor is strong and can be used with 3S resulting in much higher speed. The only snag is locating a coupler to fit 2.3mm to 3mm shafts. I use these in ABC Jetski's (on 2S) and my Tenshock minihydro.
01-16-2012, 10:16 PM
#2448
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RE: Unofficial
sweet! I'll probably get a 20mm 2s setup then and upgrade to the 3s setup with that motor then
Would the 35a ESC still be OK for this sorta power upgrade (might as well buy the right one from the beginning)
Would the 35a ESC still be OK for this sorta power upgrade (might as well buy the right one from the beginning)
01-17-2012, 01:03 PM
#2450
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RE: Unofficial
Thanks for confirming that, I thought as much, but I'm still a bit green on all the electric stuff
I found this Hobbywing Seaking-60A Brushless ESC for Boat (Version 2?) at AU$52.50 ish on fleaBay which is about $15 more than the one I was going to go with, and now I can play with different motors too down the road WOOO
WOOOI'll be getting the boat this week hopefully, give it a test drive and try to fry the original motor etc Then rip the guts out of it and modify the jet drive as per directions earlier in the thread
I'm heading to Europe for a month in a few weeks, so I won't buy all the gear for the brushless setup before I leave, as that would obviously take away from the beer fund while travelling, which of course is a big no no haha
hahaRadio Gear
($65.95) re"> FS-GT3B 2.4Ghz 3ch Transmitter (with 1 receiver)
($19.90) re"> HPI sf-10W waterproof servo
Motor
($37.33)re"> Hobbywing SEAKING 4800KV Brushless Motor Water-cooling
ESC
($52.50)re"> Hobbywing Seaking-60A Brushless ESC for Boat (Version 2)
Battery
(~$30)re"> 2x 2800mAh 30C 2s Lipo Battery - some chinese brand (Red Dragon)
Charger
($74.99)re"> eXTREME Racing R-605 Balance Charger + 5A Mains Power
The total is now ~AU$339 (including the boat at $59) with the changes needed to make this a better boat
That's for everything, if like me, you have nothing... If you had the Transmitter and charger, you'd only be looking at $150 for all the gear and an extra receiver, that's a pretty cheap boat I reckon
(now I'm wondering what is the next bargain boat...)
That's for everything, if like me, you have nothing... If you had the Transmitter and charger, you'd only be looking at $150 for all the gear and an extra receiver, that's a pretty cheap boat I reckon
(now I'm wondering what is the next bargain boat...)Cheers for all your input guys, I really appreciate it[8D]
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