Topic: Kenny builds the FAIRMILE D (Read 34041 times)

Lash151 · « **Reply #50 on:** September 03, 2012, 05:29:14 pm »

Hi Kenny... the hull looks great. What was the name of the U-Pol filler, it sounds interesting?
Lee

Stavros · « **Reply #51 on:** September 03, 2012, 05:56:14 pm »

TOP Stop is readily available in Halfords or Even use Easy Light horses for courses.Search Top Stop on ebay as well.
TBH it doesnt matter wich one you use BOTH are as good as each other.
I use either or in the workshop on a Daily basis and simply wont use anything else,it is flexible and SO SO easy to sand.Others will reccomend Isopon P38 BUT I will Guarantee you one thing they havn't tried this stuff.I do filler work and paint ,on a daily basis so the last thing I need is filler that takes time to rub down ,I need something that will ease the hard work and Guys and Dolls this is the stuff to use Believe you Me I do know what I am talking about.This stuff is ready to sand in 10 mins and if you leave it for 12mnths it will not be rock hard and unsandable.

Dave

Tug-Kenny RIP · « **Reply #52 on:** September 03, 2012, 07:16:57 pm »

Today I filled in the 'dings' with some more U-Pol and sanded flat. I've used the rest of yellow filler/Primer to re-cover the marks and this is the final job.

Grey undercoat soon. Can't stop smiling.

Stavros · « **Reply #53 on:** September 03, 2012, 07:23:49 pm »

See super STAV to the rescue AGAIN,me thinks I will just have to CHARGE for consultations

Dave

Tug-Kenny RIP · « **Reply #54 on:** September 03, 2012, 07:37:24 pm »

RAAArtyGunner · « **Reply #55 on:** September 03, 2012, 09:56:22 pm »

Quote from: Tug---Kenny on September 03, 2012, 04:20:18 pm

It's probably better to imagine it.

Makes it hard for us with no imagination

Tug-Kenny RIP · « **Reply #56 on:** September 03, 2012, 10:37:09 pm »

Better that way, believe me.

Tug-Kenny RIP · « **Reply #57 on:** September 05, 2012, 08:24:19 pm »

Started fitting the MMB's prop tubes today and need to think of buying props.

Can anyone tell me the number of blades I should get for some 35 mm propellers please. Cornwall boats have 3 bladed ones in stock but are out of stock on the 4 bladed ones (which I somehow prefer !)

Cheers folks.

Shipmate60 · « **Reply #58 on:** September 05, 2012, 08:37:43 pm »

What motors and voltage will you be running Ken?

Bob

Tug-Kenny RIP · « **Reply #59 on:** September 05, 2012, 08:46:39 pm »

Hiya Bob,

Haven't decided on the motors yet. My main problem seems to be the shallowness of the hull.

When the tubes are finally fixed into place there will not be the high enough angle for my 900's. I have been studying the sizes available in the 12 volt range and cannot decide yet. I've worked out that the 35mm props govern the angle back into the boat if laid correctly. I'm even thinking of dropping the angle away from the hull bottom, but this would put them below the keel line.

I am working from wartime pictures which leaves a lot to the imagination. I want a boat that will fly.

. I was considering brushless but discounted the Lipo idea, so back to the drawing board.

ken

Stavros · « **Reply #60 on:** September 05, 2012, 09:04:40 pm »

Longer shafts My boy

Dave

Tug-Kenny RIP · « **Reply #61 on:** September 05, 2012, 09:19:52 pm »

Hi Stav,

They are specially made and are 13 inches long. The motors are already way ahead of normal, and two are beyond the middle of the boat. I'm thinking I should have gone the 'belt drive from above' approach.

I will post some pictures before I go any further, as the slots in my nice new hull are rather longer than I would have liked.

Stavros · « **Reply #62 on:** September 05, 2012, 09:21:50 pm »

nothing stopping you mounting the 900's upside down so to speak,dont it in the past and it works

Dave

Tug-Kenny RIP · « **Reply #63 on:** September 05, 2012, 09:37:19 pm »

mmm!!!! I'll check it out.

Shipmate60 · « **Reply #64 on:** September 05, 2012, 09:44:24 pm »

How many 900 motors are you thinking of using?

Bob

Tug-Kenny RIP · « **Reply #65 on:** September 05, 2012, 09:57:07 pm »

I only have two at the moment and was thinking of driving two props each. (somehow) Failing that, then perhaps 4 smaller types of motor.

Shipmate60 · « **Reply #66 on:** September 05, 2012, 10:10:41 pm »

Kenny that is quite simple.
Cut the tubes so they are all in line inside the hull.
As the shafts leave the outer shaft fit Toothed Belt Gears to each shaft.
Fit out the outer shaft as normal si it is always direct drive and take the belt to the other shaft.
With this way any problem with the belt you still have 1 driven shaft on each side to get her home.

Bob

Tug-Kenny RIP · « **Reply #67 on:** September 05, 2012, 10:16:19 pm »

hey that man. What a thinker. Smashing idea. I'll line it up tomorrow and try it.

Andyn · « **Reply #68 on:** September 05, 2012, 10:17:56 pm »

Don't bother using 900's if you're only using 35mm props, waste of a good motor better used elsewhere...

Tug-Kenny RIP · « **Reply #69 on:** September 05, 2012, 10:25:45 pm »

Four bladed and four of them ? maybe 24 volts.

RAAArtyGunner · « **Reply #70 on:** September 05, 2012, 11:30:03 pm »

Quote from: shipmate60 on September 05, 2012, 10:10:41 pm

Kenny that is quite simple.
Cut the tubes so they are all in line inside the hull.
As the shafts leave the outer shaft fit Toothed Belt Gears to each shaft.
Fit out the outer shaft as normal si it is always direct drive and take the belt to the other shaft.
With this way any problem with the belt you still have 1 driven shaft on each side to get her home.

Bob

Neat idea,

Tug-Kenny RIP · « **Reply #71 on:** September 06, 2012, 10:18:18 am »

I've taken a few pictures to show the line up of the tubes.

Tug-Kenny RIP · « **Reply #72 on:** September 06, 2012, 10:22:26 am »

I placed the 900 motors in to get the line up, but they do look rather large. You may be right Andy.

Note. They wouldn't be 'side by slde', but spaced apart. They only show this way because the magnets clamped them together.

gra2 · « **Reply #73 on:** September 06, 2012, 02:24:53 pm »

G/day Ken,

My info indicates these boats would have been lucky to do 30 knots in real life why do you need such large motors.
My boat has two Graupner speed 600 and two 545 motors with a 8.4 v nimh battery powering each pair of motors and its quite fast enough when required.
I will get a photo of a side on view of my prop shafts for you should have done it when i did the other photos for you.
Hope this will help with your build.

Gra

Tug-Kenny RIP · « **Reply #74 on:** September 06, 2012, 05:21:59 pm »

Hi Gra,

Thank you for that. I've rooted through my 'stores' and come up with some 500's which I've just placed in for the photo.

I must say it does look the part as the shape is just right. I shall be pricing up a set of 12 volt 600's now.

Here's a picture of the angle I have to use for the prop tubes. They do hang lower than the keel but there is no way around this. It should be OK in the water with enough thrust for 30 MPH. (not scaled down

)

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Author Topic: Kenny builds the FAIRMILE D (Read 34041 times)

Stavros

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Stavros