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Old Jan 15, 2013, 01:56 AM
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chidago if you have a spare it would be helpful , its the section which bolts through the transom , which has the pivot points for the steering and reverse buckets moulded to it . . many thanks jon
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Old Jan 15, 2013, 02:48 AM
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chidago if you have a spare it would be helpful , its the section which bolts through the transom , which has the pivot points for the steering and reverse buckets moulded to it . . many thanks jon
Jon, The NQD jet is cheaper than a complete Graupner unit and it's comparatively easy and cheap to drill it for a suitable bearing, BUT it doesn't feature the mounts for the reverse bucket. To do a like for like replacement you'll need to depend on Chi's generosity if he can find one in his spares box, or spring for a complete new unit. Which will at least give you some spare parts!

Chi, no wonder there aren't many mini-jets elsewhere if Graupner US has so many. You guys have snaffled them all. Makes sense though. There are some big (full-size) ferries and such here, with multiple jets, but few personal-use boats so it follows there are fewer model ones too. And while we have many rivers and streams suitable for the model ones, we don't have many places you could use a full-size river jetboat.
Have you had a chance to quiz your friend about the phantom drag hydro yet?
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Old Jan 15, 2013, 05:58 AM
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Originally Posted by chidago View Post
G, if you want to just have a river runner, get a longer hull..the nqd is to short
i have the brushless jet boat for rock crawling and rivers but i would love to be the first to get a fully functioning nitro jetboat. someone tried it on youtube but they never got further than a fish tank i think they destroyed the prop shaft and gave up.

found the video
Working correctly (0 min 30 sec)
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Old Jan 15, 2013, 07:36 AM
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Jon, I will check thru my stuff this week end, if I have one, you can PM me your address..

Mad, the drag boat was made about 2 yrs ago, not in stock, dunno if it will be again, they are in the middle of a bankrupcy filing now, graupner germany, and are going thru the reorganization now..

G, most kmb jets work well with a combustion engine, glow or gas..so do the bigger graupners, or, mhz..

WP, in my lookin around, the gopro is said to do a bit better on vid, but the slight difference might not be worth the weight and mounting options, plus the added size on the waterproof case the gopro needs..the contour is small, 1 button record-on-off.
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Old Jan 15, 2013, 09:53 AM
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Geo, would be very easy to wreck that small shaft, a one cyl.,2 stroke engine is the most violent power delivery there is..cant balance em, smallest number of cylinders that balance are 3, and with a solid motor to jet coupling is sure death, plus its a solid shaft. flex shaft would help tremendously, as the flex/spring shaft acts as a cushion for the BANG of the engine..electrics are completely smooth, thats why they work good for our kind of application..

This is the first electric stuff I have ever done, never wanted to be tied to batteries, I like gas..as long as you have gas in your can, you keep running..

But, electric works best for some applications.
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Old Jan 15, 2013, 11:49 AM
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Geo - I agree with everything Chi said about this. You might do better if you change to Steve's aftermarket flex-shaft conversion to cushion the power strokes but it's still only a 2.3mm shaft and even a .12 nitro motor would probably overload it in short order. But don't let anyone put you off trying.

Chi - didn't know that about Graupner. How the mighty have fallen. If a top-drawer old established company like that with a loyal customer-base in their home country can fail, then what chance for anyone (who's not Chinese) to make it in today's modelling world.
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Old Jan 15, 2013, 12:26 PM
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T, lookin at the new contour roam 2..its waterproof, less $$, and smaller.. 34mm wide, 100mm long..

http://store.contour.com/ae/us/camer...m-2/invt/1800/
Yea it is good, I already have the gopro though. Need to find some shallower waters to run in first.
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Old Jan 15, 2013, 12:45 PM
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Mad, they are MUCH better off now..they will stay in business...same old story, kids inherited the company, dont work, spend money..lol they will be fine, just gotta do the reorg.

T, I was initially gonna do the gopro, but, the size and weight put me off on it..I aint done anything yet, I have a tiny one I used to put on my planes I use, but, the vid is ..
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Old Jan 15, 2013, 01:42 PM
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T, I was initially gonna do the gopro, but, the size and weight put me off on it..I aint done anything yet, I have a tiny one I used to put on my planes I use, but, the vid is ..
Contour roam2 is currently the equivalent of $310 in the UK, therefore only sold in a few pro extreme-sports shops. And for the amount I'd use it, spending that kinda dough doesn't make sense. I'll stick with my keyring cam for on-board shots and Nikon still camera with a video facility for everything else. I'll just enjoy other peoples Contour/gopro vids. As I've said before, I would rather spend my hard-earned on wine,women and song. And just waste anything I had left.
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Old Jan 15, 2013, 03:20 PM
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I'm completely new to RC. I'm getitng A blackjack and I just got my NQD. It's fun but this nicad battery annoys me. I'm trying to do a build and I been reading this.
Let me know what your thoughts are on these (follow another forum build)

motor
http://www.hobbyking.com/hobbyking/s...00kv_300w.html

esc
http://www.hobbyking.com/hobbyking/s...hless_Boat_ESC

battery:
http://www.hobbyking.com/hobbyking/s...~50C_Lipo_Pack

I'm looking for a receiver also. Can you guys make some good recommendation. Want to keep this build around 100s.

As far as the servo. Should I replace it? I'm still confuse on how to put the new motor in with the original coupler? Trying to sorted through the pages.

Also currently. when i turn Right, after let go it return back to center but it stay slightly offset to right which mean after a right turn boat tend to continue doing right turn slightly until I go left and let go. I try unscrewing that bottom screw where the wire pull on the jet but apparently that isn't the screw to change the tension of the cable...

any ideas?

Thank you.
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Old Jan 15, 2013, 04:02 PM
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Originally Posted by johnyeros View Post
I'm completely new to RC. I'm getitng A blackjack and I just got my NQD. It's fun but this nicad battery annoys me. I'm trying to do a build and I been reading this.
Let me know what your thoughts are on these (follow another forum build)

motor
http://www.hobbyking.com/hobbyking/s...00kv_300w.html

esc
http://www.hobbyking.com/hobbyking/s...hless_Boat_ESC

battery:
http://www.hobbyking.com/hobbyking/s...~50C_Lipo_Pack

I'm looking for a receiver also. Can you guys make some good recommendation. Want to keep this build around 100s.

As far as the servo. Should I replace it? I'm still confuse on how to put the new motor in with the original coupler? Trying to sorted through the pages.

Also currently. when i turn Right, after let go it return back to center but it stay slightly offset to right which mean after a right turn boat tend to continue doing right turn slightly until I go left and let go. I try unscrewing that bottom screw where the wire pull on the jet but apparently that isn't the screw to change the tension of the cable...

any ideas?

Thank you.
Your choices look good on the motor/esc/battery end of things. You will need to replace the servo because it's not compatible with a hobby grade rx. Any regular old 9g micro servo will do, but bonus points if you can find a waterproof one.

As for the tx/rx, I would go with this:

http://www.hobbyking.com/hobbyking/s...und_Radio.html

I have the screenless version of this one, which works really well, but of course right after I bought it they came out with the screen one I linked to that has model memory and everything for $10 more.

For the coupler you could try this:
http://www.ebay.com/itm/DR-3mm-x-3mm...item1c2819b3f0

or this:
http://www.ebay.com/itm/BF-3mm-x-3mm...item19d239a7a6

and get a piece of 1/8in OD brass tubing which conveniently has an ID that is the same as the impeller shaft for the NQD. Drill a hole in it for the set screw, stuff in your coupler, and you're good to go!
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Old Jan 15, 2013, 04:07 PM
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mad iknow the nqd version is a much cheaper unit , i had one in my first dory project with a stock brushed 400 motor , but without reverse the model has its limitations , i bought the graupner minijet because of the reverse capability , and made a bigger dory to put the unit into , my main interest is in sailing , the intention is to use the jet drive to rescue yachts if the keels get caught amongst the sea weed !
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Old Jan 15, 2013, 04:28 PM
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Fire, those cushioned couplers are interesting, guy will give $$ back if you dont like em too..

Thanks for posting the link..
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Old Jan 15, 2013, 04:36 PM
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Originally Posted by chidago View Post
Fire, those cushioned couplers are interesting, guy will give $$ back if you dont like em too..

Thanks for posting the link..
No problem, I came across them randomly yesterday while searching for a 3mm flex shaft for someone else. Thought they looked interesting as well, and they come in a variety of shaft sizes.
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Old Jan 15, 2013, 06:35 PM
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WP, PM for you..
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