voo2doo Posted October 12, 2010 Share Posted October 12, 2010 It has three though? J. Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 12, 2010 Author Share Posted October 12, 2010 hold the motor with the wires flat to the table and wire them up with the esc wires. if it runs backwards swap the outside two around leaving the middle connected as matt said mate Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted October 12, 2010 Share Posted October 12, 2010 so iv decided im gunna use the hull to make a fibreglass copy and. wish i could somehow make the hull a tad bigger so i can run a bigger drive. ooooh make fibre shells or maybe even a mini vac to form polycarb hulls. if they a decent price i would be interested in purchasing a hand made hull copy, you could make some decent money selling to other hobby'ists , you will need to slightly change the hull or topdec so you dont get hammered for copyright infringments. bigger hull : once you have made a fibre copy, you could biuld it up a few layers extra making the boat slightly bigger, more layers the more bigger hull becomes Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 12, 2010 Author Share Posted October 12, 2010 im thinking that polycarb has to have a perfect mould to apply over. the hull is abs plastic as stock so might use that as its more forgiving. thing with fibre is cost also and its not as flexible so may crack. a mini vac iv thought about before perfect for this project Quote Link to comment Share on other sites More sharing options...
voo2doo Posted October 12, 2010 Share Posted October 12, 2010 Fill us in on the progress Aide. . Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 13, 2010 Author Share Posted October 13, 2010 i will do as i go along mate, no worries. cant believe that i broke the impeller on my boat. i was running in shallow water though with little pebbles/stones in the river. my bad for running without the grill over the intake. Quote Link to comment Share on other sites More sharing options...
voo2doo Posted October 13, 2010 Share Posted October 13, 2010 Cant you get a replacement? J I've got a full kit of fibre here too,just waiting on you to teach me.. Cheers James. Quote Link to comment Share on other sites More sharing options...
voo2doo Posted October 14, 2010 Share Posted October 14, 2010 Well ,I installed the motor to the drive and when I started it up the vibration was unbelivable! I think there is a buckle in the prop.Anyway,after trying to straighten it the coupler on the shaft has knackered too(de--threaded it ) so I need a new one,2.25mm ID if anyone has one. Cheers J. Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 17, 2010 Author Share Posted October 17, 2010 sorry about the delay mate, my broadband goes live on tuesday. when you ran it did you make sure the strator was in place, the black plastic bit that goes on the back of the boat, as this holds a bushing that holds the prop shaft dead centre. im wondering if thats your problem. the couplers are available to buy mate >>HERE<< but its from hong kong so its going to be something you'll have to wait on. Quote Link to comment Share on other sites More sharing options...
voo2doo Posted October 18, 2010 Share Posted October 18, 2010 Well ,I bit the bullet and bought the Graupner drive .It has a 3mm OD shaft as oppose to a 2.3mm The construction is alot better but there are no mounting holes to fit it to so I'll have to make brackets. Instructions are great too,just simple to understand. It also has a reverse module as well. This will take a bit to think about as it is lowered into the water but has got to be linked up to the reverse on the ESC somehow. J. Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted October 18, 2010 Share Posted October 18, 2010 (edited) well. i am not sure. maybe add a servo inline to esc and program to react to voltage when reverse kicks on. better idea: have a small micro servo bedded to the rear hull. connect this to the thierd chanel on a triger type handset, now when reverse is required one shuts down throttle a little engages third chanel via switch. this throws the nozzle hood down and acts as the reverse thruster. the motor still turns the same direction to push boat but the nozzle redirects water flow and hence boat travels backwards. i do think most would be using the third chanel method or hardwiring the esc channeling to a servo. the third channel method would be more safe to, one thing you do not want is that impeller being thrown into reverse at high speeds, possible it will shatter/fragment and blow the new drive. so a third channel requires thought and means no mistakes and throwing the impeller into reverse rotation from a 6,000rpm+ forward rotation Edited October 18, 2010 by Tamiyacowboy Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 19, 2010 Author Share Posted October 19, 2010 as tamcowboy said, reverse has to be done by a servo on 3rd channel. If you ran the impeller backwards it would suck air as you reverse the water flow and the jet outlet is mostly out of the water. That drive sure does look nice, you can easily get replacements for it also. Quote Link to comment Share on other sites More sharing options...
voo2doo Posted October 19, 2010 Share Posted October 19, 2010 Oh yes ,I know what the reverse does its just that I'm wondering if there is a way with a two channel tranny ? J. Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted October 19, 2010 Author Share Posted October 19, 2010 i wouldnt think it would be easily possible with a 2ch tx/rx mate. id just take it off, who needs reverse anyway im considering one of these drives as well now after seeing that, ill hold off until youve got it in the boat for now, keep us updated mate Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted October 28, 2010 Share Posted October 28, 2010 As a thought....I have a spare 'reverse mixer' from a Savage reverse kit. This allows the servo on the reverse module to be engaged by a 2channel RX. Basically, after it has been pulled as a 'brake' it then activates the servo and then works as revers on the brake. The motor, of course, still runs forward. Might be possible to use somethign like that to operate the servo and then continue to drive the motor. Use a Y-lead to hook up the reverse mixer and servo Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted November 5, 2010 Share Posted November 5, 2010 Been reading this thread again, and have been following it carefully...and I reckon this is just what I need to give me options in teh world of RC. I thought about a tank....but they are too slow to be interesting for long as I don't have access to enough interesting terrain. What I do have is a couple of boating ponds not too far away......so one of these might just b the perfect Christmas gift for me ..... from me! So...I have started to collect the parts I will need. So far I have: 1 x Traxxas waterproof servo for the steering. Proof agoinst those little splash problems... 1 27Mhz RX/TX combo. Nice and cheap to buy used, as I intend to plasti-dip the RX so it is waterproof. Not going to do the to a Spektrum SR300...... Just need to get the boat, motor/esc and battery now! What gear would you recommend to get decent performance? I presume a boat ESC is better to go for, as they are less likely to suffer from the moisture etc. Don't want to spend a fortune...but do want to have something that will be fast enough to be FUN! Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted November 5, 2010 Share Posted November 5, 2010 small baby pico gas engine. small bottle type fuel cell some decent shaft grease and a prop connector able to accept the oversized nitro drive shaft and step down to a 2mm propshaft a micro nitro jet boat Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted November 6, 2010 Share Posted November 6, 2010 I am thinking of something like this ESC ... http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=7377 2S LiPo but am not sure what motor to put with it Quote Link to comment Share on other sites More sharing options...
aidensere07 Posted November 7, 2010 Author Share Posted November 7, 2010 I am thinking of something like this ESC ... http://www.hobbyking...?idProduct=7377 2S LiPo but am not sure what motor to put with it Hi mate, that esc is also available from the uk from giantcod here. as for the motor id go for a 2040 inrunner with a waterjacket, if you go 2s you want a motor around 4000-5000kv to get roughly 30k Rpm out of the impeller which is pretty much its limit I used this agin from giantcod with a waterjacket from ebay to keep things cool. you'll end up with a boat pretty similar to mine with that setup, yours will use a better esc and its watercooled so thats a bonus. Aiden Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted November 7, 2010 Share Posted November 7, 2010 Thanks Aiden That's just what I needed. Quote Link to comment Share on other sites More sharing options...
Tamiyacowboy Posted April 11, 2011 Share Posted April 11, 2011 you guys still running these jet boats with jet drives. i need some data and thought maybe you guys can help inlet duct size : ? outlet duct size ? impeller size ? thrust in KG : this is fairly easy place a set of scales infront of boat. set to kg and 0 then throttle up keeping the boats nose on the scales. take 2 readings on the thrust produced one at full power and one after 30 seconds still at full power in kg's. if no register on kilograms could you give me them in grams. boats stock weight inc batterys i have an idea of fitting one/two of these drives into a 1/24th scale wooden narrowboat thank you guys Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted May 1, 2011 Share Posted May 1, 2011 Mine blew up it's impellor, and the cost of replacing it was more than the thing was worth. Quote Link to comment Share on other sites More sharing options...
twosheds Posted August 9, 2011 Share Posted August 9, 2011 Just got a Tear into Jet boat, and wondered if anyone could recommend cheap and cheerfully easy mods to get more outta it? I don't need to go mad, but any advice about mild mods would be great! I don't fully understand some of the technical stuff, so if you can let me have links for buying the bits, i can try and research the stuff! Same sorta question, but whats the 'must do mod 'straight outta the box with these boats? Thanks! Quote Link to comment Share on other sites More sharing options...
Nitroholic Posted August 9, 2011 Share Posted August 9, 2011 Yeah...just follow the mods Aiden did....that's what I did with mine. Now we got a source of replacement impellor blades too, so mine is back together. Quote Link to comment Share on other sites More sharing options...
wastegate Posted September 26, 2011 Share Posted September 26, 2011 I've just ordered one of these and will run a turnigy 2836 - 3200Kv outrunner with a 50amp ESC and 3 cell 2200mah batteries. I will use no watercooling at all as I think it won't need it (fingers crossed) but I'll take some amp readings in the bath to double check. Should be fun! Same set up as this one: Quote Link to comment Share on other sites More sharing options...
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