Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Pleasure boats, Sports, Race, Power and Leisure Boats: => Topic started by: radiojoe on March 31, 2016, 06:51:39 pm
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Hi all,
I've never really ventured into racing craft before, the quickest boat I have is my old pilot boat which by racing standards is quite leisurely, but they look like good fun so thought I would have a dabble, I've just ordered a Scott Free deep V racer, it looks ok for the price and the revues seemed good, anyone got any opinions on this boat or own one, I'm not thinking of competitive racing or anything like that, it's just to experience a different part of our hobby, anyway more when it arrives. :-))
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Not had one myself, don't think I could handle anything fast.
Where will you run that in Gosport?
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That looks like a lot of fun for the money Joe!
Incidentally, i haven't forgotten about collecting the yacht but my wife has fractured a bone in her neck, so we are a little compromised in the mobility department at the moment! {:-{
Will you give a review of the Scott when you get it?
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I'm also looking at one these as I can't find a nice slow-ish Cabin Cruiser in my budget.
From a few things I've seen and read, the main 'issues' seem to be the flex shaft coming away from the coupler.
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Hi Nivapilot
To be honest she's probably too fast for me too, most likely end up 6" into the bank %% it's all I can do to keep up with my air boat, so I won't run at full throttle at least not right off, I don't actually sail in Gosport, there's no club for rc boats as such just the one at Walpole park although called a model boat club they have been dedicated to racing yachts for as long as I can remember and most likely always will be I could sail at Walpole Park but not much fun on your own {:-{ so I sail at our club on Haling Island about a half hour trip but worth it for the company. :-))
Hi Colin
The yacht is still here waiting for you as long as you still want it that's fine, first you with a broken foot, now your wife with a fractured bone, the mind boggles what you two get up to %%
Yes I thought I would give my thoughts on the boat when it arrives and after the first run for anyone that is interested, just ordered a couple of lipos for it and a receiver that I hope will bond with my wheel TX, same make so fingers crossed. :-))
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Hi Derma
Well this boat is new ground for me, my thoughts are there are a lot of flexi drive boats about if it this was a major problem you would hear a lot more about it, IMO some owners go OTT and fit over rated batteries trying to get the thing to fly almost, and put extra stress on the drive, I would think if you run it with in the designed configuration there should be no problem, but what do I know. %%
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Hi Joe,
Yup, you know the usual Internet horror stories!
I'm still very new to boats so will be good to see your thoughts on this one :-))
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Nothing wrong with flex drives its what we all use on our fast surface drive boats but some of the cheap rtr boats come with sub par ones and parts so be sure to check and double check everything in the boat before you run,also run for one two mins then bring her in and check every screw nut bolt you name it because many dont loctite things and they come loose.Also dont forget to remove the flex and grease it well before you use it then again after use remove and clean it and regrease for next time.Also dont drive too slow or you could blow the esc lol.
Mart
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Thanks for the info Mart, I had planned on spending some time preparing the boat before running for the first time ie. greasing Loctite etc as I do with all my warships, and as I did when I used to build helicopters it's a must for them. :-))
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The flex shafts themselves are a fine piece of engineering, however what I meant was to make sure the grub screws are secure as a few have ran these boats and lost the whole shaft!
I've just purchased a Joysways Bullet which is identical to the old Hobbyking Quanum Aquaholic. I believe the Relentless V2 and Scott Free V2 are the updated versions. Joysways also have the updated version called the Bullet V2 and US1 V2 Cat.
I think the updates include a metal prop, 60amp ESC and runs batteries in series. I think they also changed the canopy securing method.
I'll create my own thread though :D
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Hi Derka
hope you like your boat when you get it let us know what you think, yes Relentless is the cat version and shares the same running gear as Scott Free the only difference I can see is Scott Free has the rudder in line with the prop, as I believe the Bullet dose, as an observation from the photos I've seen you wouldn't want to run aground with these boats, I think the first thing to break would be the rudder pivot, as the rudder would be the first thing to ground.
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Hope you don't mind me posting in your thread.
Had it out today, my first boat, let alone fast one.
Seems to cavitation a lot, but did bite.
Once on the plane it wanted to randomly as far as I know veered of slightly and any correction had to be minor as its very sensitive.
This was made worse by probably running it in a small area with tree roots. You guessed, I hit one and it flipped! The wife went in and swam for it. I think there is a lesson here!
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I bet that was chilly!
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Hi Derka
I don't know how new you are to RC but very often people new to it over compensate on the TX especially with fast models, you could try a shorter servo arm on the rudder servo this has the effect of gearing down the rudder movement till you get used to it, just a suggestion :-)) ho and can your wife accompany me on the first run of Scott Free if she likes swimming that much. %% %% {-) {-)
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http://youtu.be/yvHYtd_9P9Q
A quick video. Stopped recording before the incident. :embarrassed:
Think I'll try in the sea next, need more space
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Looks good mate all you need to do is trim the rudder a tad to overcome the veering to one side,this is usually to the right as its caused by the prop rotation and its called prop walk.Also lessen the rudder throw a little and that should help the over steer.
Cavitation is normal for fast boats but a change of prop will also help,buy a few props and experiment,id advise trying some cnc alloy props that come balanced and sharp.If you do a bit of research you should find out the right props to try.
Mart
ps dont ever swim for a boat ,many people have drowned doing this and many of them were good swimmers.
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Build yourself a Springer tug, you can then do your own recovery and they are great fun and dead easy to build.
In fact, it is almost illegal not to have one! %)
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Just had a quick Google. They look fine. Something slow for the wife to drive/pilot?
Not sure how to go about building though, only ever built RC cars like Tamiya etc. A second rescue boat or inflatable is needed!
Hoping to get today again if I can time the tide right. I'm not running there again :embarrassed:
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Totally agree a Springer is well worth having, I nearly always have mine in the car just in case, you can make them very basic just to do the recovery job or as detailed as you like, there are a lot of build examples on here. a good investment even if just to keep swmbo dry. %%
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You can buy a full lazer cut kit for a springer as well as all hardware fittings etc from zippkits in the States,great price and cheap shipping as it comes flat packed.If you ask Joe he will also mark the value at under £40 that way no import duty to pay lol.Might need top order my self one and a few spares the price is so rediculous at $29 ,you can buy a kentucky wheelhouse kit for just $12 to go with the tug kit too %% .
Mart
http://zippkits.com/~zippkits/index.php?main_page=index&cPath=86&zenid=2844499e4df846ff8b4d8763a142b984 (http://zippkits.com/~zippkits/index.php?main_page=index&cPath=86&zenid=2844499e4df846ff8b4d8763a142b984)
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Andy Griggs does a set of glass fibre/styrene mouldings/printed sheets for a
Regular size Springer.
Check him out on Models by Design.
Ned
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Unfortunately, the cheapest shipping quote from Zippkits to the UK was $64........
The Models by design version is 50 quid if you do not fancy scratch building.
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I built Gopha Girl from bits and pieces I had around the workshop, I had a spare motor and a prop shaft that was left over from the Deans kits that I upgraded, a prop that I'd had for years, the only thing I bought was the Mtronics ESC about £19, plus a lot of fun building it without the constraints of a plan etc. Ho forgot I did buy the Skipper Sam. %%
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I'm looking on eBay for a second rescue boat ;)
Second run today, much better!
https://m.youtube.com/watch?feature=youtu.be&v=zSRwDCKHRmw
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yep this time it looked like you were in control and not the boat %% {-)
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Unfortunately, the cheapest shipping quote from Zippkits to the UK was $64........
The Models by design version is 50 quid if you do not fancy scratch building.
Thats only around £44 ,the kits only £20,not bad at all knowing the quality of the kits having built a few .
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Second run seemed a lot better mate :-)) ,dont forget though fast surface drive boats turn better and easier to the right due to prop rotation , also its easier on your driveline,less strain on it.
Mart
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I'll have to remember to go clockwise next time.
The handling is ok, I think when not planing you can/have to use more rudder control, but once it pops into the plane, only tiny adjustments are needed.
I've knocked the dual rate down to less then 50% to help.
Battery is a 2200mAH 30c 3S LiPo. I have a large 5000mAH 3s. Assuming I can fit it in, Is there down sides to running such a large, heavy battery? I guess handling will be affected.
As you look at the boat from the rear, the ESC is on the right and battery on left. I guess it would help with torque from the prop.
The ESC says it can handle 2-4S but I'm unsure the 2815 (according the manual) 1900kV out runner will be ok.
To be honest it's more than fast enough!!
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looks really good on the water I do hope however that you have fully washed it down with tap water to remove all the salt residue from it
Dave
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Usually you only need 15 deg of movement on the rudder at speed,yes they wont turn well when going slow.Personally id have battery central for better balance , not sure if you can alter that in your hull without major surgery ?.Many use 2 lipos one either side for balance,still 3 s configuration but higher mah and longer runtimes.Your kv of 1900 should be fine upto 5 s as thats only a tad under 30 k rpm loaded which is perfect for a fast boat but yes maybe an upgraded esc :embarrassed: ,however 4 s should be no problem i would think so probably fine to try that .
Also as Dave suggests maintenance after running in salt water is a must,rinse down after and also remove driveline and clean and regrease
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The boat arrived today, and a little while after the two lipos came along with the receiver, so all systems go or so I thought, had a look at the boat first, even knowing the measurements it looked bigger that I had imagined, I nearly bought the hydopro inception (joysway alpha) at just over a meter glad I didn't now Scott Free is ample size for our club lake, obviously blow moulded it feels quite sturdy, and has a really nice finish, overall I quite like it, though one thing I noticed was the hole in the front of the one piece hollow hatch that locates over a stud is drilled right though, that could allow ingress of water into the hollow void so I injected some P38 in and I'll drill out just enough for the stud, I know they say you should seal round the hatch with tape but what a pain getting tape round the front radius of the hatch, so won't be doing that, the batteries two 2s 4000's were a pain to get in place, but having done it once I guess I'll get used to it, next the binding of the new receiver with my flysky wheel Tx you guessed it didn't happen, tried several times, the Tx is a FS-GT2E and the new receiver is the same make but a FS-GR3E, so have now ordered a Fly Sky computer system cheep as chips and dose what it says on the box, and I can play around with the EPA on the rudder.
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I would def use tape to seal the hatch mate or when it flips your electrics wont be happy.Trust me its not if but when you flip a fast boat lol.You can use a good quality electrical tape to seal it, should stretch to the shape if you do it right .
Mart
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It looks pretty good Joe, sort of instant lunacy really %%
Enjoy your first outing.
Simon
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Lunacy that's the word, it will most likely end up shorter with a flat bow when I get though with it. %% %% {-) {-)
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Looks very nice!
My hatch on my Joysway Bullet is the same, I didn't even notice till I saw you mention it. Ill have to do the same.
Is yours running a 60amp esc?
You have a metal 3 blade prop too.
Mine is 2 blade nylon 40mm diam and 1.4 pitch.
These are fast, take some space and getting use to but great fun. Im paranoid about flipping it though!
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Lunacy that's the word, it will most likely end up shorter with a flat bow when I get though with it. %% %% {-) {-)
That's alright Joe, I am sure you will be able to re-model as a landing craft {-)
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Hi Simon, that would be one fast landing craft. %% {-)
Hi Derka, yes a 60amp ESC, a large out runner, running on 4s (two 2s in series) and a three blade metal prop, I've flipped my air boat a few times some times you get away with it by letting it dry out but I have replaced the ESC and the motor it's all good fun ain't it. {-) {-)
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Finished the locator on the front of the hatch drilled just deep enough to take the stud to make sure it didn't snatch and go too deep I put a depth stop on the drill, I'm not trying to teach grandma to such eggs, but it may help anybody really new to modelling, to remove the flexi shaft the instruction book says undo the two grub screws in the coupling, but they must have changed the coupling because this one is more like a drill chuck or compression nut, so you just need two spanners to loosen the coupling and the shaft slides out, it's actually easier the fiddling with two grub screws make shaft maintenance simple.
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Hi,
I have one of these, and so far it has been a great model for me, apart from one thing, I want to run it from a "Pistol Grip" controller such as the FS-GT3B, but because there is no reverse I cannot use the controller without an elastic band pulling the throttle fully "back" into reverse - what controller are you usinng?
(See my thread - http://www.modelboatmayhem.co.uk/forum/index.php/topic,54457.0.html (http://www.modelboatmayhem.co.uk/forum/index.php/topic,54457.0.html)
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Hi I'm still waiting for a new flysky wheel 2.4g to come I don't have a receiver that works with the one I've got so I'll let you know how I get on with it. but have to say The wheel Tx I use with my air boat I've removed the centre detent and have a elastic band on that mainly because I'm using a Hobbyking ESC and I couldn't be bothered to get a programming card to remove the reverse function. %%
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The FlySky GT3B came this morning so I was able to complete the set up of the boat first fitted the receiver in the balloon not an easy job but eventually got it in without tearing the balloon, and then spent some time getting to know the new Tx it's actually quite a nice piece of kit very easy to set up and programme, I've always had stick Tx's in the past but having bought a cheep wheel Tx for my airboat I'm finding them very intuitive especially on faster models coming towards you, so I can see me using the new 10 model memory one a lot, so on to the calibration of the ESC this was done with no problems so the throttle is between centre position and full ahead I decided to leave the self centering in and just use half the movement as I will probably be using this TX on boats with reverse.
So very happy with the FS-GT3B £25 very well spent, I could have spent hundreds of pounds on a computer radio but it wouldn't perform any better than this one.
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The rx on that radio is the one i tested under water after seeing it done on the net and it worked so even if they take a dunk its not a problem lol.I use the newer gt3c and i love it i dont even use my expensive futaba gear any more.
Mart
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As in my thread, I have this boat, and the same Tx/Rx, which now work together. :} I took mine out today and ran 2 set s of batteries through it, I love the way it sits dead straight when it gets up on the plane. Reasuringly, you can also see a stream of water coming out of the water cooling hole (it must have a better name) on the side, when at 1/2 throttle, at full throttle the boat is gone before I could see.
I have used the same Rx in many model cars, a lot being off road models - that has had the Rx suffer everything from being completely submerged, to being covered in baked on clay, and never yet had one fail on me, which for a £5-£6 unit is amazing.
All I have ever done after one got wet was spray it with GT85 (which I always have on hand for the rc cars) and leave to dry. I have even taken apart the unit and just covered the PCB with tape where space has been an issue, again with no issues.
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:-))Glad you got your calibration issue sorted, when I re calibrated the ESC to my new radio I also had two reverse the throttle channel but apart from that it was fine.
I have found one issue with the GT3B Tx when I display the voltage it says 4.5 volts even though I have 8 fully charged batteries in there, so it should be 12 volts or very close, every thing works just as it should I'm thinking maybe it's a firmware error I can see no way of changing the voltage read out but as long as it performs I'll live with that. {:-{
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The gt3c comes with a lipo battery pack and its rechargeable using a usb cable or usb charger plug,its def worth the extra few £.
Mart
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First outing with the Scott Free today, this boat is insane, soon rolled it off one of our marker bouys and flipped it Springer to the recue, surprisingly little water in it, she was still running fine, but very soon realised our club lake is far too small for it, especially having an island in the center and you guessed it that's where she ended up nose up on the island, Good old Greg (SailorGreg) came up with some rope which we stretched across the lake and over the boat to pull it off, this is where I gave up, she needs a massive amount of area to run in, so I can't see me getting much use out of her, so she may well be up for sale shortly.
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Try the harbour......or Stokes bay.... :-))
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Yes I'm sure there are places where I could run her Walpole park lake for instance is 1/4 mile long but I prefer to sail in the club environment, so I've decided to offer it for sale, and get something not quite so fast.
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Sorry to hear your selling her mate,maybe if your into building you could build a nice little Riva and run her at scale speeds.There are plans available,pretty sure i have one somewhere that i planned on building.
Mart
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yes your right, and I've been thinking along the same lines, or possibly scratch building a small speedboat after I've finished my present build I'll be given it some thought. :-))
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Well, it was pretty spectacular while it lasted - in short bursts at least! Glad to be of assistance.
I'm sure if you had persevered you could have enlarged the lake, chip by chip. Of course you would have needed to reinforce the bow a little. {-)
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Cheers Greg, do you think it would be possible for the club to move to Langstone Harbour %% %% {-)
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With this boat now up for sale, I've been thinking about what to replace it with I'm looking for something with a bit of speed but a bit more sedate than the off shore power boat, although our club lake was obviously too small for it I have to confess at 71 my old brain couldn't really keep up with it at one point it did a u-turn leapt out of the water like a demented flying fish plopped back in and tore off heading toward the island in the middle of the lake and despite throttling back had enough momentum to beach on the said island, so I have now decided to scratch build a fast,ish cabin cruiser based on the 1960s Diva I like the retro look of her and have spent an enjoyable day drawing up the plan and frame templates, it's over 40 years since I scratch built a hard chine hull so no doubt I'll be correcting a few mistakes along the way, I don't normally have two builds going at the same time but after I've got this one off the drawing board I can potter along with this one and Brocklesby.
Joe.