Topic: Whiplash Hydro Build (Read 96426 times)

glennb2006 · « **Reply #100 on:** October 13, 2009, 01:10:55 am »

Thanks Martin, cheaper than a lost model so I will buy some.

I have been busy tonight, managed to add some kevlar to the more vulnerable areas, shown in the pictures. The other seems have been taped and epoxied for additional strength too. Shame it will not be possible to do the top sides when the deck is on. Never mind.

The STBD sponson reinforced. This one takes the stresses of the turn fin.

The port sponson. Strengthened to take the day to day battering and forces encountered in the event of mishaps!!

The turn fin bracket, shaped on the edges (the bevels) to hopefully deflect water up and over with minimal interference during turns.

The whiplash GV that got me back on track with building the wooden one again.

I hope the wooden one is as strong, and at least as quick as, the GV version. It flies.

My conundrum with the 6mm engine mount rubbers has been sorted too, I found someone who sells 6mm captive nuts.

More soon hopefully.

Glenn

martno1fan · « **Reply #101 on:** October 13, 2009, 10:56:53 am »

Hi Glenn not sure what room you have to work on the deck from inside when fitting etc but what i would do now is get some trangular stock and glue it to all top edges of the hull to give more gluing area if you cant get in to glass it that should help stop it popping in a crash.That said mate the Rocket deck held up pretty well in a 61MPH Flip ,she went 8 ft in the air sumersaulted and wham but just a 2" popped seam where the cowl fits ,all outer edges were fine.Have to say i was worried when i saw her take flight but was amazed at the outcome,yup wooden boats are pretty strong lol.Like the look of your new GV whip,what you got planned for the scheme of the wooden one? i kinda like the part wood part paint look myself.
Mart

glennb2006 · « **Reply #102 on:** October 14, 2009, 11:19:11 pm »

A little on some areas where I can maybe get fingers in the glass the top on, but most of it no access. I already fitted the 1/8" strips to all the tops as doublers, see how it goes, I am sure it'll be fine.

The pool floats arrived today so I can get the sponsons filled with foam.

It's getting there.

Glenn

martno1fan · « **Reply #103 on:** October 15, 2009, 04:40:38 pm »

Im sure you will get there mate good luck with it

.
Mart

glennb2006 · « **Reply #104 on:** October 18, 2009, 08:14:21 pm »

Got some more done this weekend.

The engine is mounted, though I had to pinch the mounts from my Whip GV - if anyone has some hypertorque style mounts for sale I am interested, they need to have the rubber brackets on the power take off end in line with the centreline of the crankshaft.

A couple of pictures:

This one shows the motor in position, the rubbers have been marked for the holes to be put in for the blind nuts.

This shot shows the stuffing tube through the hull. There is a short piece of brass tube that the actual stuffing tube runs through, makes it easy to change the shaft tube if needed in future. As can be seen, I pushed the tube all the way into the collet for alignment purposes.
The outer tube was tacked with araldite and has now been bonded into place with resin and microfibres, makes a paste that dries solidly. Should hold the tube firm.

It's getting there slowly.

Glenn

glennb2006 · « **Reply #105 on:** October 21, 2009, 12:45:19 am »

Some more work has been done, I got the prop shaft bent into shape and in position, the fuel tank (bag) is in place and the priceless foam flotation is installed.

Some pictures below.

The engine and flotation foam installed. (This engine is the one from my GRP Whiplash, I will be fitting another Zenoah that I have into this model).

The fuel bag. An empty IV bag.

The bottom of the boat with the tube in. I think I will elongate the slot in the strut further to allow me to get the prop centreline a bit higher.

Just about run out of excuses not to fit the deck now!!

Glenn

glennb2006 · « **Reply #106 on:** November 16, 2009, 12:48:36 am »

Starboard side deck fitted, I'll put pictures of the port side going on / clamped. What a challenge!!

Glenn

glennb2006 · « **Reply #107 on:** November 19, 2009, 01:28:00 am »

OK, so I really have been getting on with it the last few days, as you will notice, the model crept back into the house, the ambient has dropped and for the epoxy to work correctly, it needs room temperature. Which is not found in my garage!!

Some pictures showing the port side deck being fitted, a mix of slow epoxy and microfibres was employed to mix up a a glue which was placed on all the hull spars prior to fitting the deck. This stuff dries as hard as bell metal.

The deck underside was coated in epoxy resin prior to fitting. The challenge being to ensure it was all touching where it should be for the duration of the drying process.

Flotation was previously installed prior to deck fitting.

Interestingly, too much clamping force was often an issue, with the wood being flexible, it was very easy to pull things out of shape and away from contacting the frameworks.

The fwd end of port side deck going on.

ANother shot, further aft. Note the two 4mm screws, these go into captive nuts in three layers of ply under the deck, this is the tuned pipe aft mounting. Or will be..

A wider shot - lots of clamps needed for building these things. The deck has been very challenging both port and starboard, mainly due to the compund curves, the port side in particular as the anti-trip caused issues with clamping. Got there in the end though.

I must say now it is nearing completion, it has suddenly become a hugely rigid item, probably more so than the GRP version I have too, and there is still the centre deck section to fit.

I might be nearly converted to wood. (In fact I ordered my next project which is wood already) Come on Mart - bring it on.

But so far, the kit has been pretty straightforward to put together. I think another one would take two weeks to get where this one is now. Live and learn though.

Now to trim back the lips and start sanding prior to coating the whole thing in epoxy.

Glenn

martno1fan · « **Reply #108 on:** November 21, 2009, 11:17:04 am »

Its looking good now mate

,the top decks are a pain to get on with all the curves as you found out.I'm glad you are slowly coming to realise wood has its uses

.The fact they stay more rigid than glass ones should hopefully make her run faster than the glass one but time will tell.I know thats what the guys used to say about them but there are ways to make the glass ones more rigid,adding a bulkhead here or there where possible or even part bulkheads works well.Once shes finished it will be interesting to see what the weight difference is between the two.On a side note mate i have some cool plans here for a 50" kneeler style hydro for outboard setups but i plan on making a few adjustments to allow inboard setups also.It doesn't have a cowl as such so ill need to design one.Ill start a thread next year on the build.So whens the big day sometime in the new year i guess?.
Mart

glennb2006 · « **Reply #109 on:** November 22, 2009, 03:59:16 am »

Quote from: martno1fan on November 21, 2009, 11:17:04 am

Its looking good now mate ,the top decks are a pain to get on with all the curves as you found out.I'm glad you are slowly coming to realise wood has its uses .The fact they stay more rigid than glass ones should hopefully make her run faster than the glass one but time will tell.I know thats what the guys used to say about them but there are ways to make the glass ones more rigid,adding a bulkhead here or there where possible or even part bulkheads works well.Once shes finished it will be interesting to see what the weight difference is between the two.On a side note mate i have some cool plans here for a 50" kneeler style hydro for outboard setups but i plan on making a few adjustments to allow inboard setups also.It doesn't have a cowl as such so ill need to design one.Ill start a thread next year on the build.So whens the big day sometime in the new year i guess?.
Mart

Well it's coming along. I never doubted it would be capable in wood, I am still nto convinced it is the best material for a boat. It is very light though I must say, and any errors can be easily repaired. As I said, it is also very rigid now and feels strong. The real advantage in this compared to the other Whip I have is that all the edges are really sharp, so it should break the water well and be low in drag if I get it right.

Next job will be to fit the cowl, which is one of those pressure jobs, one chance to get it right, and very visible. The start to fit our radio box to suit radio install. Then more sanding and coat the wood in epoxy.

I also need to mod a motor to go into it, I might do some more port work to the motor I have in the GV and use that, though I have another untouched Zenoah waiting to be ground to pieces!

Always something to do.

I am aiming for the New Year to get this wet Martin, though time pressure is really mounting at the moment as work is a bear and got lots going on in the personal life. Might even get to go boating one of these days with my other boats.

Glenn

martno1fan · « **Reply #110 on:** November 22, 2009, 09:38:50 am »

I'm sure you will get it done and it should run great with a modded motor,you make a good point about the sharp edges.Problem with glass hulls is its hard to make the edges sharp without having issues with the parts coming out of the moulds easily.
You can sharpen them up but what many glass boat manufacturers don't do is use a bog of resin and fibres in the corners and sharp edges so you cant sharpen them up much without going through to the cloth or matt

.You might wanna ask Brian if they do that on his hulls before trying it

.I do that on all my boats so people can sharpen them if they want that extra bit from them but as you say wood can be done sharp from the start so its not an issue.
Glenn i have been boating 6 times this year

,i just haven't had the time ive been too busy.Good luck with getting her finished and ill look forward to seeing some vids when you do.
Mart

glennb2006 · « **Reply #111 on:** November 24, 2009, 01:56:07 am »

The Whip GV is fast enough as it is right now, not really had much chance to work on it for speed as yet, base set up form where I got it and it over 70MPH, so not too shabby so far. It is not running the right prop either, bit too big but the motor turns it, though need some motor work done too to get some more go out of it.

The wood whip comes on, and I will put some photos up tomorrow, as it is now the Epoxy is drying (again), this time on the cover, got it cut and fitted so there is some progress. A job done that I was not looking forwards to.

Lots and lots of sanding to do. Next job will be to fit out radio box, install linkages etc. Then I can glue the deck on.

Nearly there.

Glenn

martno1fan · « **Reply #112 on:** November 24, 2009, 09:59:24 am »

I'm sure you will be able to get her to 80 mph no problem once you get chance to dial her in etc,the rocket does 58-61mph without ridepads depending on water conditions which isn't too shabby.With them i had her to 68 and thats with the base setup i did when i built the boat,no prop changes or alterations other than strut height to account for the ridepads etc ,Fastest ive heard of one doing is 69 not sure anyones hit 70 yet so i havent done too bad with it.
Im sure the whip will easy reach 80+ as its a much smaller lighter boat,different animal all together anyway.They run more like a rigger than a hydro from what ive seen,very fast boats for sure.To be honest 60 is fast enough for me on a narrow lake

,in any case im retiring her to concentrate on my own hydros from now on.Might clean her up and give her a new paint job and sell her on as a bare hull.
Mart

Mal X · « **Reply #113 on:** November 24, 2009, 04:46:22 pm »

that looks fantastic, i've just brought my first fast electric boat today, i've brought the Robbe Magin 1

if i enjoy this and all goes well, then i'll be be getting a fast cat from:-

http://www.swissmodelpowerboatteam.ch/135er.html

this one is 135 cm long

Mal X · « **Reply #114 on:** November 24, 2009, 04:49:14 pm »

Quote from: Mal X on November 24, 2009, 04:46:22 pm

that looks fantastic, i've just brought my first fast electric boat today, i've brought the Robbe Magin 1

if i enjoy this and all goes well, then i'll be be getting a fast cat from:-

http://www.swissmodelpowerboatteam.ch/135er.html

this one is 135 cm long, but they also make some truly massive hulls

glennb2006 · « **Reply #115 on:** November 24, 2009, 10:24:17 pm »

Quote from: Mal X on November 24, 2009, 04:46:22 pm

that looks fantastic, i've just brought my first fast electric boat today, i've brought the Robbe Magin 1

if i enjoy this and all goes well, then i'll be be getting a fast cat from:-

http://www.swissmodelpowerboatteam.ch/135er.html

this one is 135 cm long

Very good, enjoy the Robbe, not run one but it looks afun place to start. The HPR boats are things of beuty, well made, very expensive. Need some big motors to run them too.

Something to aim for though.

I'm nearly at the end of this my first wood build. (Should say, first wood build since I was 14). So it has been interesting for me, I think I'd build another a lot quicker, cleaner and a little differently, but now just looking forward to getting the motor sorted and ready to go into it. My engine mounts arrived today so off we go again.

Glenn

Mal X · « **Reply #116 on:** November 25, 2009, 12:43:13 am »

yes i'm trying to build her as light as possible, but also to find the most powerful brushless motor to suit her, all of this is new to me, because i used to build tugboats only.

these Hydroplanes look awesome on youtube

Mal X · « **Reply #117 on:** November 25, 2009, 08:15:45 am »

The smaller cat hull 115cm is 260 quid and the 135cm hull is 346 quid, so they're very expensive, but top quality.

i can get a 32'' hull for miles cheaper, but i'd rather have the far larger 115cm, plus it's a far better build

Mal X · « **Reply #118 on:** November 28, 2009, 11:41:59 pm »

i saw one on youtube tonight with a jet turbine model aircraft engine

it sounded exactly like a jet fighter, it was a Budweiser; it sounded totally awesome

but this one wasn't as fast as yours, no way, i think it did about 70 mph, yours will be 80 to 90mph.

john j · « **Reply #119 on:** November 28, 2009, 11:56:09 pm »

It still brings a smile to my face when i fire it up three years on !

http://www.youtube.com/watch?v=yT1uSHB4oAs

http://www.youtube.com/watch?v=b20o85ffmkQ

If i had a suitable boat, i would love to try it out (if i could find somewhere suitable)

Mal X · « **Reply #120 on:** November 29, 2009, 12:58:10 am »

flipping heck WoW

that looks great.

i had a P51 Mustang years ago, that looked great too.

i dont know how much damage would be done to a jet turbine if you crashed at 90 mph on water though, but it sure does sound the part

john j · « **Reply #121 on:** November 29, 2009, 01:38:53 am »

Quote from: Mal X on November 29, 2009, 12:58:10 am

i dont know how much damage would be done to a jet turbine if you crashed at 90 mph on water though, but it sure does sound the part

Yeah, that is a big concern. It`s bad enough when you get a reciever wet, let alone a £500 ECU not to mention the turbine itself, and you also need two seperate proportional channels to operate the turbine, so 2.4 might be the solution to that.

That said, i would be prepaired to try it if anybody can recommend a suitable boat ?

Mal X · « **Reply #122 on:** November 29, 2009, 01:49:18 am »

Quote from: john j on November 29, 2009, 01:38:53 am

Yeah, that is a big concern. It`s bad enough when you get a reciever wet, let alone a £500 ECU not to mention the turbine itself, and you also need two seperate proportional channels to operate the turbine, so 2.4 might be the solution to that.

That said, i would be prepaired to try it if anybody can recommend a suitable boat ?

no i cant think of one, because all RC fast electric boats crash dont they, only much slower scale boats are stable and even they get wet inside.

john j · « **Reply #123 on:** November 29, 2009, 01:53:42 am »

Quote from: Mal X on November 29, 2009, 01:49:18 am

no i cant think of one, because all RC fast electric boats crash dont they

Even on calm water?

john j · « **Reply #124 on:** November 29, 2009, 02:00:35 am »

Would fitting a Gyro to it help keep it Die straight, or is this not the cause of crashes ?

(maybe we should start another thread for this one)

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Author Topic: Whiplash Hydro Build (Read 96426 times)

Mal X

Mal X

Mal X

Mal X

Mal X

john j

Mal X

john j

Mal X

john j

john j