RE: HK Small Bolt Hydro same as HOTR
Thanks! Not a screenshot. Photo made with DSLR from a boat. You need the camera to follow the boat for a bit smooth background. Alone? Invite a girl (any) to go with you! [;)]
Posted on: 7/15/2011 3:23 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10622021

RE: HK Small Bolt Hydro same as HOTR
One photo from this summer runs.
Posted on: 7/11/2011 7:46 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10616016

RE: HK Small Bolt Hydro same as HOTR
Hi guys! I'm watching this thread, but I have not done many things with my Bolt. Lust runs in 2010 I have finished trying different props with default setup. Have find out that 30&32 props are good enough and I would prefer 30 in many cases with stock setup. This year I bought another one Bolt from HK (in order to not be alone at the pond). Now they comes without ESC, so I ordered Turnigy Marine 60A ESC from HK. (I know it's too big and heavy, but that was the only I could order from HK at that moment). I received 2nd boat, made some soldering with the ESC and almost ready for the first run, but still have not done this. The only thing, that disappointing me is that drive dog's part of drive cable not holds firmly with the flex one (cable is square shaped and just put in the rod). And it is also greased. First I decided to glue it, but seems like it is designed to be so. A little bit strange, because in the first Bolt all the cable with the rod looks like one complete part.
Posted on: 7/11/2011 3:17 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10615717

RE: HK Small Bolt Hydro same as HOTR
sundogz have offered you good charger and supply. Is for me I have this: http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=7028 and this: http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6256 also why 2200 25C? Try 1800 3S 20C or 25C http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9274 or http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6293
Posted on: 2/4/2011 4:30 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10311334

RE: HK Small Bolt Hydro same as HOTR
Sure YES, but it's not a good deal... For this you have to buy 12V supply (same as for ALL). No setup with friendly interface with LCD etc... 0.8A max charge current... Why don't you buy from hobbycity?
Posted on: 2/4/2011 4:19 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10311325

RE: HK Small Bolt Hydro same as HOTR
So yo have paid for one but get 2? If so you should pay to seller you have asked for refund :) Have you problems with 1st seller "force-control"? Now 2 sellers available: http://cgi.ebay.com/60A-Watecool-Waterproof-Brushless-ESC-Boat-watercraft-/380290201867?pt=Radio_Control_Parts_Accessories&hash=item588b0ff90b#ht_3639wt_1139 http://cgi.ebay.com/60A-Watecool-Waterproof-Brushless-ESC-Boat-Hovercraft-/380290533077?pt=UK_ToysGames_RadioControlled_JN&hash=item588b1506d5#ht_3516wt_1139 and http://cgi.ebay.com/60A-Watercool-Waterproof-Brushless-Regler-Rennboote-/300494275745?pt=RC_Modellbau&hash=item45f6dac4a1#ht_946wt_1139 Price about $25 Can't choose which to order... ESC definitely the same. Difference is only in seller and seller's proposal to different countries (1st and 2nd links).
Posted on: 11/19/2010 11:19 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10145334

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: nickster46 Here it is autumn but it feels like winter. It is very very cold (and early dark after noon)[/quote] Same here :( To carakter: which 60A ESC have you received? Is it that cheap ESC from ebay , that become unavailable?
Posted on: 11/12/2010 3:35 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10130519

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: carakter In case any of you guys want nickster's esc on his boat, it has been relisted here . . . http://cgi.ebay.com/60A-Watecool-Waterproof-Brushless-ESC-for-RC-Boat_W0QQitemZ350400473271QQcategoryZ140972QQcmdZViewItemQQ_trksidZp4712.m263QQ_trkparmsZalgo%3DSI%252BSIC%26itu%3DUCI%252BUA%252BFICS%252BIA%252BIEW%252BUFI%252BDDSIC%26otn%3D8%26pmod%3D350400473499%252B380259653445%252B300464874919%26po%3DLVI%26ps%3D63%26clkid%3D5239224785502967723 [/quote] Not available... It's strange thing. I suggested it would be in stock forever :) Please post the link here if found same ESC for the same price.
Posted on: 10/5/2010 2:36 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10048365

RE: HK Small Bolt Hydro same as HOTR
I haven't been charged for tax fees. HK from HK :) Think you shouldn't worry...
Posted on: 9/24/2010 7:48 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10023822

RE: HK Small Bolt Hydro same as HOTR
Why NOT? If you already have this opportunity to spend time at the countryside (village). Doesn't matter how far it is. Why not to buy another toy to play with? :) I can say more I go with helicopter+airplane+boat :)
Posted on: 9/17/2010 7:46 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10008258

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: carakter The nearest decent pond I can go to is an hour and a half away from me. . . [/quote] Not so far away :) The lake, where I can run it now is 160km away :) And it takes about 2-3hours driving to it. (I need real boat to swim for Small bolt if flipped because it's quite cold water now and there it is)
Posted on: 9/17/2010 4:26 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10008167

RE: HK Small Bolt Hydro same as HOTR
I have used glue gun for this purpose... And also 1 zip tie over.
Posted on: 9/17/2010 4:19 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10008162

RE: HK Small Bolt Hydro same as HOTR
M3x3
Posted on: 9/16/2010 4:47 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10005918

RE: HK Small Bolt Hydro same as HOTR
If you don't have a lot of baterries with Deans to use and plan to buy other from HK, you should look for XT60. Replace connector on ESC or make adapter cable. Also for me XT60 are better to connect/disconnect. You don't have to get 2.4GHz from HK, but I think it's good idea. I have bought HK GT2. It works well. I placed receiver in 2 small plastic bag with 2x 20cm servo leads and antenna cable coming out. And I placed antenna at the left inside the hull. Stock steel antenna lay with manual :)
Posted on: 9/15/2010 9:50 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10003437

RE: HK Small Bolt Hydro same as HOTR
Receiver would be supplied from the stock ESC, when you connect it in the THROTTLE channel of Rx. You don't need extra BEC or battery. Throw away that manual. You only need to mount the rudder according to it. Other useful things mentioned here. I made XT60 male -> Deans female adapter with good 12 AWG (14 or 16 fits) wires about 5-7cm.
Posted on: 9/15/2010 4:54 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=10003323

RE: HK Small Bolt Hydro same as HOTR
You better set it to 3.3V/cell. For Li-ion and Li-Po batteries it's ALWAYS better NOT to discharge it completely. (And even for Ni-Mh). It is only good to full discharge for Ni-Cd. Discharging below 2.7V damage Li-xx cell. More often you discharge it below 3V = less battery life. I'm saying it's better finish run (at least full speed) before it's slowing down. You can make it by measuring runtime and using clock or approximately. But even know this, I've stopped a many times when cut-off appeared. It's not good.
Posted on: 9/13/2010 11:26 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9998912

RE: HK Small Bolt Hydro same as HOTR
Batteries usually become hot and puff at the end of the cycle. It's better to run with over-rated current till 3.3-3.7V each cell than discharge battery with smaller current, but down to 2.7-2.9V/cell. Don't let them run till the cut-off (stop run by estimating time) or increase cut-off voltage if this setting available for the ESC (for non-stock ESC). Also check if batteries balanced well with your charger.
Posted on: 9/13/2010 9:34 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9998642

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: carakter Question is, are we really realizing savings? With burned motors left and right, maybe we have to re-think our position.[/quote] Yes, we are, I think. I've heard several offers to replace ESC with reliable one. For example "Castle creations". Look for it's price. Then they offer to replace motor. Then batteries. And then whole boat... Probably you just want to burn motors... If not, why are you trying outrunners? As for Pekka's burned stock motor - it can have burned because of ESC. I mean if ESC die it will cause motor to die. Have your ESC survived, when stock motor burned? Also a bit durty connectors maybe. I think that (as nickster46 tested) 4S battery is the best improvement for this boat. Or 3S with ~3500kv inrunner.
Posted on: 9/10/2010 3:15 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9992065

RE: HK Small Bolt Hydro same as HOTR
It is definitely possible. The only thing that matters - which wattmeter to choose.
Posted on: 9/6/2010 9:06 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9983469

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: nickster46 Maybe I will try the 5750kv motor on 4s this week [/quote] And don't forget to put a piece of meat nearby :) Think it will be able to fry well :)
Posted on: 9/6/2010 6:40 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9983308

RE: HK Small Bolt Hydro same as HOTR
I think we can't talk about motor+ESC temperature after run... Because of watercooling. It is quite effective. But motor or ESC can be burn in deep during run, even when surface (watercooled) seems just warm after run. So we must make measurements. Yesterday I was able to run my boat for 4 packs :) I also have bought 1.4x30 and 1.4x32 props. It was cool. I tested standart 1.4x27 prop, then 1.4x30, then 1.4x32. I wanted to put Turnigy Wattmeter into the boat and make measurements during run, but unfortunately I haven't been able to do it, because it is too big and tight :( What can I say: First run with stock prop. Next pack with increased size prop. It's running better with 1.4x30. I can't say, I saw, speed definitely increased much, but it seems to be so. Next pack tested with 32 prop. It also seems like speed increased, but just a bit. After 1.4x32 I tested stock 1.4x27 and it's interesting that I haven't seen much difference. With 30 and 32 props boat begin to plane very fast. Seems like immediately, while with stock prop it can be easily seen that it needs time for speed up and only then it begins to plane with interesting "sound". I like this sound, but can't hear this transition from run to plane with 30 and 32 diameter prop :( Also 1.4x32 propeller, I have bought (same type as stock) is too long. I mean that with it I'm not able to screw-on the nut fully. Only about half the screw. So I will choose stock or 1.4x30 (I think same as Octura 430). It will be very good to make measurements of speed with help of radar and Power measurements with Wattmeter inside the boat. What I think of: how much amps draw the stock motor with 430 prop when running at full speed? We can put 1800-2200mAh 3S battery inside. Usually it is rated to 20C. Some 25C-30C. But even with 20C current (36A-44A) we will get less then 3min runtime. (I run almost all the time at full throttle). 3min is quite few for me. (Assuming time it takes to wipe out and retape the hull). So it seems to me that there is NO REASON to make a setup that will draw more than 35A. Or at least 45A. If stock setup with 430 or 432 prop consumes about 20A it is possible to increase power some way. (By changing motor for example). If it consumes about 30A it's no way to modify anything, because we will reach limit by battery or acceptable runtime.
Posted on: 9/6/2010 6:35 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9983303

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: carakter Hopefully, I can test the 4200Kv outrunner this weekend - on 2S and 3S . . . with the stock prop. [/quote] I think no reason to test 4200kv motor on 2S (7.4x4200=~30,000rpm) so it seems to work same like the stock motor. Only thing you get is increased current (You want to get at least same as stock or more power from battery, but with less voltage battery it must draw more current). Increased current will increase voltage drop (and power loss) on connectors, wires, ESC etc. So increasing kv and reducing voltage to 2S is worst case I think. Unfortunately I can't do the same things now. It's getting a bit cold and windy. And I'm able to run the boat at quite big lake and only at the weekends. So I always wait for wind to calm down. Want to buy 40x30 prop. Than maybe 40x32. Don't want to change motor. About shaft: I disassemble it again to clean and grease it well. But I could NOT solder shaft end (from the motor side). I tried to do it at different temperature setting at the 60W iron 350-450C. I have soldered a lot of things, but soldering steel is always very hard task. Shaft don't want to tin. I tried to clean it from old grease, but it can't be down completely. Have used very good flux and good solder. The only thing I think of is to use soldering acid, but actually worry about it because it will cause rusting. Have you done it when the shaft was still ungreased at all? Are you sure it has soldered well or just covered with solder?
Posted on: 9/2/2010 5:56 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9975637

RE: HK Small Bolt Hydro same as HOTR
OK. If we need to increase speed, first that we can do is to increase prop size (or pitch?). It's good idea and we all know about it, and most tested it. We get increased speed and increased current. We have to carry about current not to exceed limit for the ESC and for the motor. (We can measure it with Wattmeter or at least check that ESC&motor not hot). MOSFETs in stock ESC can withstand continuous current up to 85A (but with very good cooling). So rate 30-40A with watercooling seems to be normal. ESC will withstand more current but also can burn even at rated currents and stock setup (as mine). We should measure speed and compare it to calculated speed. Voltage*kv=rpm (~12*~2600=~30,000rpm), pitch=1.4" it must give about 30mph speed. (http://www.props4u.com/prop_chart.htm) It's very interesting that nothing said there about propeller diameter. Don't know if this matter on not. If speed differ very much, than we have more propeller slippage. (Don't know still on how to decrease it - to change pitch or diameter). If we need to increase rpm best way to do it is to increase voltage (change 3S to 4S). But first we should check if the motor and the ESC can withstand this voltage. Don't know about the stock setup & 4S, but I wouldn't check it. So if we can't change 3S to 4S and not satisfied with stock setup and different props, we can change motor to another with different kv. This motor must withstand Max current of at least 20-30A I think. Because we need to increase speed, we need to get more Watts at least. Now we can calculate new data on RPM and find out new speed. But nothing said on how to reach this "ideal" speed. What I wanted to say: we have talked about 5750kv motor, that in our setup must give more than 50mph while sinking probably much more than 50A. But with 10A max current it must burn very fast. In reality it can't deliver so much power and not burned because of watercooling and other things. Let's try inrunner motor with a bit higher kv (say no more than 3500) with max current rating of more 30-40A while watercooled. Or it must be at least same diameter motor and not shorter by lenght.
Posted on: 9/1/2010 8:23 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9973560

RE: HK Small Bolt Hydro same as HOTR
Sure in this case motor give very much rpm, and with the prop used it must have very big speed, that can't be reached. So big part of energy transfer to heat. It's bad... Battery definitely must NOT become hot. It usually becomes hot at the end of the charge. Usually you must stop using it at this time to prevent puffing. I'll try to write down some calculation later.
Posted on: 9/1/2010 6:16 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9973436

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: carakter @Yura - you seem to be good at calculating things . . can you be our resident engineer / mathematician and do the calculations for the proposed setups? [/quote] What do you mean "our resident engineer"? :) [quote]Also, outrunners produce more torque compared to inrunners . . which is why it's the motor of choice for planes and helis.[/quote
Posted on: 9/1/2010 4:33 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9973375

RE: HK Small Bolt Hydro same as HOTR
Also this motors have max Amp about 10A How much Amps, do you think it can withstand with watercooling?
Posted on: 8/31/2010 4:19 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9971019

RE: HK Small Bolt Hydro same as HOTR
Wish you a good play with this thing! :) (For me) I don't think 5750kv is a good idea if you plan your boat to make more than 20-30 runs... Are you sure your shaft or strut bearing will be satisfied with such rpm? Please calculate efficiency (I mean take your battery voltage, kv ratio, prop you use and calculate theoretical max speed, than measure your real speed). Sure, you see the real speed less than 60-70% of theoretical. It's not good, I think. What is the reason for such increasing kv? You also can increase prop diameter, you know. Doesn't it help? Thanks you said us that this motors will fit perfect to the mount and watercool jacket! From the link you provided I would choose 3850kv motor for the test... But I need to test 40x30 and 40x32 props first...
Posted on: 8/31/2010 4:06 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9971009

RE: HK Small Bolt Hydro same as HOTR
[quote]ORIGINAL: Motorcrosskid does anyone have range problems with the hobbyking gt2 radio? [/quote] Mine work well in the range where I can see my boat normally and in the range I can swim to flipped boat :)
Posted on: 8/24/2010 1:46 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9955858

RE: HK Small Bolt Hydro same as HOTR
To beejay1: I also agree that your problem is 90% in battery or it's charging. Also take a look on connectors and clean it if needed. I also can't see water coming out - it's very hard, because it's not strong water flow even at high speeds...
Posted on: 8/23/2010 8:41 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9953622

RE: HK Small Bolt Hydro same as HOTR
I just applied a bit of epoxy around servo mount. Also I decreased moving range (D/R ajust available on my transmitter) from maximum to the middle. And I have bent pushrod to avoid touching the edges of the hole. After this useless servo load that was just bending the floor decreased.
Posted on: 8/19/2010 4:27 AM by Author "Yura" in the forum "Speed - Electric"
http://www.rcuniverse.com/forum/fb.asp?m=9944429