New Years Day Test Run - Top Speed 48mph

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Retroman
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Location: Great South Bay, Long Island, NY. Building a Zip/Flying Saucer

New Years Day Test Run - Top Speed 48mph

Post by Retroman » Sun Jan 01, 2012 6:53 pm

Hey Guys, Im finding it hard to believe, The GPS on my wifes phone says 48mph. Im not sure how accurate that is. What do you think?

http://www.youtube.com/watch?v=ygqBEtgD9XM

NO WAY
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RetroMan
Built A Zip/Flying Saucer. I do my boating on South Oyster Bay, Long Island, NY
Documenting my build on YouTube @ http://www.youtube.com/SuperUnknownMC

upspirate

Re: New Years Day Test Run - Top Speed 48mph

Post by upspirate » Sun Jan 01, 2012 7:17 pm

Try checking it against the car speedo when in the car.

12' with a 40HP Merc....yep could very well be!!!

Did you ever check it with the Johnson??

Cold damp dense weather could help the power out too....maybe not quite as fast in hot summer air.

Retroman
Posts: 199
Joined: Mon Apr 25, 2011 5:08 am
Location: Great South Bay, Long Island, NY. Building a Zip/Flying Saucer

Re: New Years Day Test Run - Top Speed 48mph

Post by Retroman » Sun Jan 01, 2012 7:19 pm

25 mph with the 30hp Johnson.
RetroMan
Built A Zip/Flying Saucer. I do my boating on South Oyster Bay, Long Island, NY
Documenting my build on YouTube @ http://www.youtube.com/SuperUnknownMC

upspirate

Re: New Years Day Test Run - Top Speed 48mph

Post by upspirate » Sun Jan 01, 2012 7:23 pm

Now you know why the hassle with a Merc!! :wink:

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vupilot
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Re: New Years Day Test Run - Top Speed 48mph

Post by vupilot » Sun Jan 01, 2012 9:21 pm

If its accurate that's FLYING! . I've yet to see an inaccurate GPS. You sure you arent messing with us and had it set on Kilometers per hour? :lol:


For comparison I get 30mph with my 1975 40hp Mercury on a much heavier slightly longer Zip

Retroman
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Joined: Mon Apr 25, 2011 5:08 am
Location: Great South Bay, Long Island, NY. Building a Zip/Flying Saucer

Re: New Years Day Test Run - Top Speed 48mph

Post by Retroman » Sun Jan 01, 2012 10:00 pm

Thanks Chris, she must of had it on kilometers. I calculated it to be 30 mph. Sounds more like it to me. Im carrying on like a school girl in that video, I cannot believe that didnt occur to me. Wow, not so high on life now.
Damn cant believe it, If it sounds to good to be true, it probably is. I never used one of these smiley face things before, but it seems called for now. :( :( :( :(
RetroMan
Built A Zip/Flying Saucer. I do my boating on South Oyster Bay, Long Island, NY
Documenting my build on YouTube @ http://www.youtube.com/SuperUnknownMC

upspirate

Re: New Years Day Test Run - Top Speed 48mph

Post by upspirate » Sun Jan 01, 2012 10:30 pm

A friend told me his new 49cc scooter with him and his wife would run 50 some MPH. I told him I'd never seen one that did.....same thing... kilos....he was let down big time!!

Retroman
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Re: New Years Day Test Run - Top Speed 48mph

Post by Retroman » Sun Jan 01, 2012 10:40 pm

I knew it was to good to be true. all part of the fun. Still had a great time.
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RetroMan
Built A Zip/Flying Saucer. I do my boating on South Oyster Bay, Long Island, NY
Documenting my build on YouTube @ http://www.youtube.com/SuperUnknownMC

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travis24
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Re: New Years Day Test Run - Top Speed 48mph

Post by travis24 » Mon Jan 02, 2012 2:41 pm

looks like way to much fun. Motor sounds great keep up the great work. I found a Mark 55 myself will be picking it up on the 21st.

Travis 8) :D :D :D
It's like anything you Build. You have to be Patient.

Measure Twice, cut Once.

Keep em Alive ! Vintage & Antique outboards

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vupilot
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Re: New Years Day Test Run - Top Speed 48mph

Post by vupilot » Mon Jan 02, 2012 5:22 pm

30 eh? Hmm. I would have guessed it would do more being shorter and lighter. What prop are you running?

Retroman
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Re: New Years Day Test Run - Top Speed 48mph

Post by Retroman » Mon Jan 02, 2012 6:36 pm

not sure what prop Chris. 2 blades part #22914. Yeah, i should be doing a little better i thought that also. Im made no adjustments to the carbs, or the transome height. Im sure the motor can come up a bit. I was running at maximum negative trim. I did try adjusting the trim. 1st time i tried it on the 3 rd holefrom the tramson, 2nd try was the second hole from the transome. Both times the bow was bouncing around, i was unconfortable so i went back to the hole closest the transom and I was pleased with the ride. my friend and I are each, at least 250lbs, I had a battery, 6 gallons of gas and a few tools bags. She had the GPS on KILOMETERS, Im almost posative anyway.............................my wife is a riot...those are the things that make me love her more. I went from such a high, to such a low. Thank god it was only because of the speed of my boat. I kinda feel fortunate. Those are the problems that you want. Karen you are the bomb. love you.

That spot in the picture, between us, is our spot, thats where we hang out during the season.................We call it "The Point of No Return" 12 weeks till spring.
Remember, there are "No Worries Beyond This Point"
Videos of the point:

http://www.youtube.com/watch?v=c7kBAb9-oxs

http://www.youtube.com/watch?v=KDPrYoNk ... re=related
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RetroMan
Built A Zip/Flying Saucer. I do my boating on South Oyster Bay, Long Island, NY
Documenting my build on YouTube @ http://www.youtube.com/SuperUnknownMC

Moeregaard
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Re: New Years Day Test Run - Top Speed 48mph

Post by Moeregaard » Mon Jan 09, 2012 1:53 pm

We typically see 30-31 MPH @ 5600 RPM with the 1956 Mk 55 on our Zip. Switching to an 11"-pitch prop drops the RPM to approximately 4800 RPM with no increase in performance. Our motor has never been overhauled, so it's possible that a fresh Mk 55 would add a couple of knots to our top end. Once I get that Merc 500 in the garage put back together, a "couple more knots" will not be a problem.

-Mark Shipley
A boat is just a wooden box with no right angles.

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Iggy
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Re: New Years Day Test Run - Top Speed 48mph

Post by Iggy » Mon Jan 09, 2012 3:42 pm

On these small boats I am sure 30 mph feels a lot faster... closer to the water, lighter on the waves!

I believe 50 kph = 31.25 mph, a respectable speed for that engine/boat.

Nothing else I've built with my 2 hands goes anywhere close to that speed ;)
Ian (aka Iggy)
My Malahini Build

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