C19 Stretch and re-build - Launched!!

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TomW1
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Re: C19 Stretch and re-build - Engine on!

Post by TomW1 »

TomTom wrote: Thu Dec 09, 2021 3:31 am
TomW1 wrote: Thu Dec 09, 2021 12:39 am Man TomTom what a great job. That Yamaha 150 should make her fly.

Tom
Do we get a speed “guesstimate” out of you Tom?!! I sadly have no idea what she weighs!

TomTom depending on load and fuel on board you should be able to reach mid to upper 40's. Again I used the C21's weights added some weight for all your beautiful wood and used my usual numbers for people, gear and supplies.

Tom
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

OneWayTraffic wrote: Thu Dec 09, 2021 1:16 pm https://drive.google.com/file/d/1nxgvP0 ... sp=sharing

Chapter 8.

the length given here is for each cable. It later states that you can add ~ 4m in total length to the cables. (2m for +ve and 2m for -ve.) AWG 2. If your model is more recent things might be different but not that different I would think. Of course a bigger wire would have less voltage drop.

I snipped a couple of the sections.
This is most useful! Thanks

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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

TomW1 wrote: Thu Dec 09, 2021 8:15 pm
TomTom wrote: Thu Dec 09, 2021 3:31 am
TomW1 wrote: Thu Dec 09, 2021 12:39 am Man TomTom what a great job. That Yamaha 150 should make her fly.

Tom
Do we get a speed “guesstimate” out of you Tom?!! I sadly have no idea what she weighs!

TomTom depending on load and fuel on board you should be able to reach mid to upper 40's. Again I used the C21's weights added some weight for all your beautiful wood and used my usual numbers for people, gear and supplies.

Tom
I love your optimism! I doubt I would go that fast even if I could!

TomTom
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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

APLJaK wrote: Thu Dec 09, 2021 6:50 pm
TomTom wrote: Thu Dec 09, 2021 3:31 am
TomW1 wrote: Thu Dec 09, 2021 12:39 am Man TomTom what a great job. That Yamaha 150 should make her fly.

Tom
Do we get a speed “guesstimate” out of you Tom?!! I sadly have no idea what she weighs!
If it helps, my CX19, with a Yamaha F115 sitting on a single axle EZLoader came in at 1500kg. I figure about 300kg for the trailer? So right around 1200kg for the boat (with cuddy) and motor (170kg). The boat had minimal fuel onboard when I weighed it (perhaps 50L = 36kg).
Interesting. Somehow I am pretty good at making things too heavy - but she did seem to float quite light on her lines so I may be surprised!

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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

Rmarsh wrote: Thu Dec 09, 2021 8:18 am Amazing.!!!! You are a very talented man.
I think most people would say pig-headed over talented! But thank you anyways!

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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

Jaysen wrote: Thu Dec 09, 2021 12:40 pm That would be ideal but likely impractical.

As to gauge, co sides going “up one” from recommendation of you can afford it. Ex: if math says 4 go 2. Thicker cables never hurt unless your chase tubes are too small or corner radius is to tight.
Yes - I agree the heavier the better. Not worried about the chase tube as much as where it has to go into the engine through the rubber grommet alongside the rest of the wiring, the control cables and the fuel line. I have heard you can constrict the fuel here if you aren’t careful.

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Re: C19 Stretch and re-build - Engine on!

Post by TomW1 »

TomTom wrote: Fri Dec 10, 2021 5:05 am
TomW1 wrote: Thu Dec 09, 2021 8:15 pm
TomTom wrote: Thu Dec 09, 2021 3:31 am

Do we get a speed “guesstimate” out of you Tom?!! I sadly have no idea what she weighs!

TomTom depending on load and fuel on board you should be able to reach mid to upper 40's. Again I used the C21's weights added some weight for all your beautiful wood and used my usual numbers for people, gear and supplies.

Tom
I love your optimism! I doubt I would go that fast even if I could!
Yep TomTom you don't need to run her at wide open throttle. Remember a C19 wiith a 115 runs 42 in real life, so your C21 with a 150 would not be unreasonable to reach my numbers. I think the mid 40's say 43-47 are very reasonable. It just depends on your load. I just don't know how much that extra wood added to the weight. Also the 150 weighs a little more than 100lbs over the 115. Good luck.

Tom
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

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Re: C19 Stretch and re-build - Engine on!

Post by TomTom »

Image

Image

Launched yesterday! Still floating today. Hit 36 knots with 2 on board at 5400 rpm. Planing hump pretty much gone. 8 kts at 2100 rpm. Very pleased with the outcome.

Happy New Year everyone.

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Re: C19 Stretch and re-build - Launched!!

Post by cape man »

Awesome!
The world always seems brighter when you've just made something that wasn't there before - Neil Gaiman

fallguy1000
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Re: C19 Stretch and re-build - Launched!!

Post by fallguy1000 »

Is there a pod for the engine or is that an illusion?

When you fish, do you troll? How fast?
My boat build is here -------->

viewtopic.php?f=12&t=62495

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