Precedent Perkasa 37 inch

[harry smith 1Participant @harrysmith1]

Another unfinished boat !!

[harry smith 1Participant @harrysmith1]

Hello Gentleman

My mate gave me this boat because of health problems.

He was given the boat a number of years ago and had fix down the deck and removed the wheelhouse which was glue to the deck.

No raised rear section and was short by 1/2 inch to the stern.

This required cutting the two sections apart, installing full length stringers with cross pieces.

Removed all the plastic windows which had more glue than window.

Removed the 3/16 shaft and bushes.

Installed custom bushes and 4mm stainless drive shaft.

Installed a 3639-1100kv 800Watt brushless motor, 60 Amp car ESC and a 3 blade 37mm prop.

Has the wheelhouse was in state I removed a lot of the forward section and installed double 10mm magnets at the front of the wheelhouse and a single double magnet at the stern.

I can stick my fingers in the window holes and lift the whole boat with battery, so I do not think it's coming off in a hurry !!

Regards to you all and a Merry Christmas and Happy New Year

Harry Smith

[harry smith 1Participant @harrysmith1]

Hi All

More pics from the build .

Harry

[harry smith 1Participant @harrysmith1]

HI All

The two cabin sections back together and undercoated.

Deck undercoated.

The lot of filler/undercoat on the hull bottom.

The bottom was that bad I target spray filled and sanded.

After getting right, spray on Revell Matt 37 which the local car paint shop colour match up for me.

The only problem you can only light spray matt and wait for it to dry.

Then spray again.

Worked out cheaper than 14mm paint pots and a better finish.

Harry

[harry smith 1Participant @harrysmith1]

Hi All

Added a bit of deck green and finished fixing up the stern.

Harry

[harry smith 1Participant @harrysmith1]

Hi All

I have been cracking on with the boat, also making some of the fittings.

The boat has had it's first voyage in very windy and choppy waves .

The boat handle the conditions very well and at 60% throttle look about scale speed.

The boat turned well with the balance point 375mm from the stern.

Pushing the boat at full throttle into the wind and waves, it at a few points that only the last 100mm was still on the water!!

I was surprise of the speed and handling.

I was thinking of swapping the motor for more power, but that idea has been scrapped.

Harry

[Dave MilbournParticipant @davemilbourn48782]

I was thinking of swapping the motor for more power, but that idea has been scrapped.

Blimey, Harry! Are you feeling unwell? ;o)

DM

[harry smith 1Participant @harrysmith1]

Hi Dave

Yes Dave I am Fairy unwell !!!

Too much Fairy bread.

Harry

[Dave MilbournParticipant @davemilbourn48782]

That's Fairey with an E……unless you're into the kind with wings that allegedly live at the bottom of the garden. I checked ours once and all we had there was slugs. I don't suppose they bother you too much in that climate.

Have a bonza Christmas.

DM

[harry smith 1Participant @harrysmith1]

Hi Dave

I check the bottom of our garden, no Fairey's or fairy's only Elve Pressly !!!

Only 18 degrees with light rain today.

Have a great Christmas.

Kind regards to the whole forum tribe.

Harry Smith

[harry smith 1Participant @harrysmith1]

Hi All

Added all the deck bits I had made so far.

Ordering some bits next year.

Looks like fair weather for Saturday's sailing and maybe 17 with cloud.

Harry

[harry smith 1Participant @harrysmith1]

Hi All

Ran the boat on Saturday and added some weight to move the CG forward 15mm.

This made the boat better in a straight line, but the turning was bad because the rudder angle to the boat's planning angle.

I will have to change the angle to help keep the bow up in the turns.

Harry

[harry smith 1Participant @harrysmith1]

HI All

This is a link to you tube which shows the Precedent Perkasa on it's first voyage.

**LINK**

Harry

[harry smith 1Participant @harrysmith1]

Hi All

I have change the rudder angle and rack it 8 degrees forward.

This help to turning a bit, but I still was not to my liking.

Removed the rudder blade and made a new one with the leading edge parallel to the shaft.

Ran the boat in rough water this morning with maximum power at 80%.

The boat turn with the bow only dipping slightly.

Very happy with the modification .

Next test is full power with a fully charge battery or two.

Harry

[harry smith 1Participant @harrysmith1]

Hi All

Adding a few pics of the new rudder setup, also have change the battery setup.

Removed some lead weight(920 grams) and mounted the battery forward to get back to the CG point.

I can move the battery to change the CG.

In the full forward position the boat cannot keep the bow up in the turns, so it was back to the turning problem.

So more playing around, but without the lead weight in the boat, it has increased the boat speed.

Working on the radio mast and cooling mast at present.

Harry

[ashley needhamParticipant @ashleyneedham69188]

coming on well Harry.

my electric bike only has 250 watts, to put things in perspective…

Ashley

[harry smith 1Participant @harrysmith1]

Hi Ashley

No pedals installed in the boat, so that 's why the 800Watts !!!!

Harry

[harry smith 1Participant @harrysmith1]

Hi All

The boat had a vibration problem from the start and I finally added two stingers with the new battery mount.

The forward new bearing is shot from this, so I replace it with a roller bearing.

Check the drive shaft inti the solid coupling and it slides in very easily.

Added a small bit of 4mm fuel tubing for safety(stop the shaft dropping out if the grub screw comes undone.

End of summer today with the forecast today of 25 follow by 32,36,27 and 23.

Back into total fire bans for the next three days.

Harry

[ashley needhamParticipant @ashleyneedham69188]

Harry. Only 23 degrees! You will freeze over! We pray for 23 over here….

Suprised you removed lead ballast..didn’t think things like this were fitted with ballast? Where is the roller bearing in the picture? And how did you manage to fit it on the existing tube please.

Ashley

[harry smith 1Participant @harrysmith1]

HI Ashley

The roller bearing has a chrome end with you can see between fuel tubing and the 8mm brass tube.

These bearings are used in rc cars.

The lead ballast was a quick fix at the time, but with the new battery mount it's not required.

Also it slowed the boat down and I cannot have that !!!!!

I do have a standard image to maintain !!!!!

Harry

[harry smith 1Participant @harrysmith1]

Hi Ashley

This is our basic drive line setup.

From the left, Nylon 4mm lock nut, prop, drive dog, Teflon washer, Teflon lower bearing, outer tube, 4mm stainless shaft with fuel tubing, 4mm roller bearing and metal uni-joint(4mm to motor shaft size).

We do make our own solid aluminum coupling with Allen key grub screws, but without an alignment tool the uni joint works OK.

Harry

[harry smith 1Participant @harrysmith1]

Hi All

Close to finished, may add some more bits like hand rails around the cabin later.

Harry

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