Hotshot 45 build

[kendt]

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Here is the basic hull as it arrived. Purchased here. It had no cowl so I would have to make one.
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At this stage im prepping the hull for the addition of expanding foam. Wood was used to make sure the foam would not distort the thin hull. The low expansion kind was used but I wanted to be extra sure.001.jpg
The next step was to add wood so the bottom of the sponsons could be "blueprinted". I want nice sharp edges as well.003.jpg
A large dip was found in the forward center portion of the hull. Wood was added to correct the problem. measurements were taken at 2"spaces on the sponsons for trueing.It turned out to be a major PITA....

[kendt]

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Here it is with the nearly completed plugs for the cowl and motor cover....More to come soon.

[rcboatmanwithkids2880]

Hi Kendt ,

Will keep an eye on your progress mate , what set up are you considering , BL Motor & ESC etc ??? Proboat Stilleto ?? lower drive looks good on the back

All the best in F/E R/C Boating ,
Brad

[kendt]

I have a cc 1717 motor for it and will run on 6s. The lower unit is a k&b but I also have the bullet drive unit which I could use also. The esc will be the hobbywing 150 platinum pro .The 1717 is pretty beefy motor so the cog will be a bit tricky. If I have to I may go with a slightly smaller motor to reduce the weight on the back.

[kendt]

003.jpg002.jpgHere is a shot of the fiberglass laminates that will be added to the sponsons. They will create a glassy smooth and narrower riding surface and will stop about 1"short of the rear to create a step.They will also be added to the center section. The added material on the sponsons will increase the depth of the tunnel thus reducing air pressure. Whatever I add to the sponsons I want to do the same with the tunnel

[siberianhusky]

Nice! Can't wait to see this one running. Been working on the hydro today, our show was cancelled. I'll have the hardware done today, last of the skin is on the bow section, for now I'll use a flat hatch with just a bulge for the motor, I'll make a plug and mould for a 'glass one over the winter.
Want to have that new boat thrill one last time this season.

[rcboatmanwithkids2880]

H Kendt ,

Recently i ordered a std. size s/s servo mount off an Ebay supplier , though they sent me a mount for the larger size servo instead . Just wondering if fitting the larger size servo is over the top or not . Maybe in 6s configuration as i plan to run in my .45 Hotshot requires the larger servo - what do feel is best ??

All the best with your project mate ,
Brad

[kendt]

Your boat looks great. I love the decals you got. I love the old open cockpit tunnels and hydros.As for the servo You dont need a big one you just need a strong one. I was going to use a 1/4 scale servo i have on hand. But it sticks way out the top of the radio box so i ordered a couple hi torque metal gear units off fleabay. They have much more torque than the big one i have, and fit in the hull much nicer. If that isnt enough there are many standard size units with far more torque than even the ones I got so whichever one I go with I plan to stick to the standard size versions.

[rcboatmanwithkids2880]

Yeah , i will stick with the std size servos as well . Got two set up in my Apparition as " Push - Pull "" system & they put up with the extra weight of sport set up i run 2X 4S , . Just don't want to send the large servo mount back , as it's to much rigmoral - I'll just buy another & hope they get the order right this time ....

Good luck with your build mate , do you know of any famous North American raceboats that used this style of hull , would be intersting to see some pics of one ...

All the best in F/E R/C Boating ,
Brad

[kendt]

This is the best site I have found for these type of hulls http://www.fastonwater.co.uk/bob_spalding.html. What do you plan for your set up. The 1717 I had planned may not go on this boat. Its just darn heavy. When I was looking at how it would balance it looked like it would require some added weight up front, even with my 6s packs as far forward as they'll go.Since the batteries and motor are heavy enough the last thing i want is to add even more weight.I have the bullet drive which is actually lighter than the k&b unit but i doubt the difference is big enough to change the outcome.

[rcboatmanwithkids2880]

Yeah , that's where i got my motivation to replicate my current .45 build , just meant North American pictures of our style of hull . If your considering another BL Motor for your build , then check out the Scorpion 40-25-1100kv ( http://www.innov8tivedesigns.com/pro...roducts_id=569 ) , so it should have a lower centre of gravity & being 8 pole should have plenty of torque . It was pointed out to me good guy on this site by the name of Lohring .

[kendt]

Ya I have looked at the scorpion motors. Even looked at the kits,,,lol. I need to get it in the water and do a bit of testing to see how it will perform. Being a 20 yr old hull and the changes i,ve made its likely smarter not to make any final desicions on motor choice till i get a feel for what its capable of.

[rcboatmanwithkids2880]

As an Outboard configured 6S hull , i don't think there has been much performance gain in the last twenty years since Hotshot .45 was launched on the R/C Boating market just maybe design tinkered with . It has great Hydro & Aerodynamic lines & the dimensions such as being 15 inches wide , provide a good stable ride quality , which may have been overlooked for a decade or so , though i am sure with your boat being launched in the near future , it will highlight a boat that is as worthy today , as twenty or so years ago ....

Good design is timeless , maybe just forgotten about at times !!! . Consider the lives lost , trying to beat Australias Ken Warby's Water Speed Record set in 1978 - That hull he used , should have been more closely studied by those that attempted beating that record since - such as Craig Arfonz ( Spelling ?? )

Brad

[kendt]

Yes it seems like a pretty good design. The main issue is the quality of the molded fiberglass. All the edges are very rounded, not a good thing, and the bottom was a bit out of wack.

[rcboatmanwithkids2880]

My Kit must have been an earlier release ( ?? ) from Dumas as it produced as an all - wood kit , with no pre formed cowling etc. Which saw me use CA glue to form the round cockpit cowl . It was in amazing condition though , with the blueprint & instruction sheet like new , though slightly yellowed with aging . When i opened the box i put the by blueprint in a frame & hung it on my storeroom wall , where most of most of my R/C Boating soldering etc gets done ( see attatchment )

Brad