Unofficial "NQD" Tear into Jetboat Thread
06-01-2012, 02:05 PM
#2701
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Location: Sunshine Coast, AUSTRALIA
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RE: Unofficial
Hey mate
I made a list a few pages back, here it is 
I just noticed that someone in Australia is selling this boat as a brushless kit, for AU$199 excluding radio gear, but it's a better setup for 2S than 3S with a 4400KV motor and 50amp ESC. He'll sell you the radio gear for an additional $80, but then I'd rather get the GT3B that I got for less than $50 to be honest
Tear Into 3S setup:
Boat
[/b](AU$59.00)re"> NQD Tear Into jet boat (probably a knock off from China, how do you know anyways?)
Tear Into 3S setup:
Boat
[/b](AU$59.00)re"> NQD Tear Into jet boat (probably a knock off from China, how do you know anyways?)
RadioGear
<o
></o>(AU$44.09)re"> FS-GT3B2.4Ghz3ch Transmitter (with 1 receiver)
<o></o>(AU$19.90)re"> HPI sf-10W waterproof servo<o></o>
Motor
<o></o>(AU$40.00)re"> HOBBYWING Seaking B28 3900Kv Brushless Motor
<o></o>(AU$ 9.56)re"> Universal Joint (motor coupler), 3mm to 2.3mm<o></o>
ESC
<o></o>(AU$52.50)re"> Hobbywing Seaking-60A BrushlessESCfor Boat (Version 2)<o></o>
Battery[/b](light and heavy options to play with weight distribution)
(AU$30.00)re"> 1x 11.1V 2200mAh 30C Lipo Battery
(AU$20.00)re"> 1x 11.1V 1300mAh 30C Lipo Battery
Charger
<o></o>(AU$70.00)eXTREME Racing R-605 Balance Charger + 5A Mains Power<o></o>
Hoses + Glue AU$10
I ran my boat again yesterday arvo on my way home from work, let me tell you, lucky I own a 4WD!!
It's been raining a fair bit where I live, and the creeks are flowing pretty hard (not over flowing, but there's a lot more water in there than usual).
Well I ran my boat aground, on the opposite side of the creek... HAHAHA, I had to put the car in 4WD low, lock the hubs in, drive through the creek and rescue the boat, water was up to the doors on the car, but I love 4WDing, so all up, a great start to the weekend LOL
cheers
Martin
06-02-2012, 12:34 AM
#2702
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RE: Unofficial
Hey guys,
Man this boat is so much fun, especially on the higher c rated batteries!!
So I did the only sensible thing I could think of... had to try it... bought one of theTurnigy nano-tech 2200mah 3S 45~90C Lipo Batteries
At AU$33, it's a bit more than from hobby king, but by the time you've waited for it to be sent, and paid postage for that matter, it's probably about the same... In any case, I paid $30 for a 2200mah 25/50C lipo at the hobby shop, for the price, they're not bad actually but 3 bux more for such a jump in C rating hopefully gives the boat a bit more spark 
but 3 bux more for such a jump in C rating hopefully gives the boat a bit more spark I need to take the boat into some proper river surfing, but I need to make another grate first... Playing with the position of the prop has mad a massive difference in water pickup, further back is definitely the go...
Cheers
Martin
06-02-2012, 06:49 AM
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RE: Unofficial
ORIGINAL: seehuusen
I need to take the boat into some proper river surfing, but I need to make another grate first... Playing with the position of the prop has mad a massive difference in water pickup, further back is definitely the go...
I need to take the boat into some proper river surfing, but I need to make another grate first... Playing with the position of the prop has mad a massive difference in water pickup, further back is definitely the go...
06-02-2012, 04:09 PM
#2704
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RE: Unofficial
Hey Sundogz, nope, I actually mean the position of the prop makes a difference, but the wedge not being all the way back makes a different behaviour, that I noted on the last page creating lift right at the back of the transom, causing the nose to be pushed down
creating lift right at the back of the transom, causing the nose to be pushed downThanks for the tip on the grate, I'll look for something with a mesh like that
Drew a couple of quick pictures to show what I mean:
First pic is a more ideal position it seems, where the front of the blade on the prop isalignedwith the front of the HORIZONTAL part of the wedge
These props have a tendency to make their way forward, and when that happens, this causes a bit of turbulence at the bottom of the prop, which pushes water pressure back down the intake, causing worse flow, and thus less performance. I've tried to show what I mean in the below picture 
I find with the prop further back, I get more suction, and less air through the drive, even on choppy stuff!
Just thought I'd share the findings
Cheers
Martin
PS. Good old photoshop makes it easy to create a different version of whatever you work on So I made a diagram of what happened to me the other day, where the "wedge" moved forward because the screws at the bottom came loose. This created a lot of lift in the rear LOL
So I made a diagram of what happened to me the other day, where the "wedge" moved forward because the screws at the bottom came loose. This created a lot of lift in the rear LOL
06-02-2012, 04:25 PM
#2705
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RE: Unofficial
Once I stop going to play with my boat all the time... hahaha, I'm going to make a mould of the prop as well as the wedge. These will be made out of composites, e.g. fibreglass and resin
I would like to play with different prop pitches, and a two blade design cant be that hard to copy and modify... nor the wedge, which I could then try different angles of the wedge as well as differing horizontal lengths... When I get around to it...
I saw someone had extended the their stator housing, what effect does that have?
Cheers
Martin
06-02-2012, 10:54 PM
#2706
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RE: Unofficial
ORIGINAL: seehuusen
I saw someone had extended the their stator housing, what effect does that have?
I saw someone had extended the their stator housing, what effect does that have?
Cheers
Martin
and it will be coverd with the hatch.
I think it was the water that got into it, it's one of those with a water cooling jacket and wrapped in plastic...