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blackmagic

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Reply with quote  #1 
Here is a video of my boat running at WOT.  My first run is to the west where I don't quite get wide open and after the turn I run wide open for about a minute.  I'm curious to see if anyone has feedback on the how the engine height looks.  Cheers!



Huey

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Reply with quote  #2 
Good video, thanks for posting. Engine height looks spot on so good work. She sounds like she is turning good WOT RPM, what are you seeing and with what prop? She gets out of the hole well at the start and the hull must be a good one to do those sort of speeds in that water-not the smoothest water i have seen and would be fun going 60Kn in that water.
steelhead

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Reply with quote  #3 
What are the water pressure and temperature readings 4000>WOT?
blackmagic

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Quote:
Originally Posted by Huey
Good video, thanks for posting. Engine height looks spot on so good work. She sounds like she is turning good WOT RPM, what are you seeing and with what prop? She gets out of the hole well at the start and the hull must be a good one to do those sort of speeds in that water-not the smoothest water i have seen and would be fun going 60Kn in that water.


Today I was turning 5750 at WOT at about 80% trim with a 24" RX4.  Carrying about 45 gallons of fuel.  I was alone on the boat: 240 lbs.  I have the porta-poti in the cabin: I don't want to guess how much that weighs now... and I have 100 lbs. of ballast in the bow.  The ballast is for running at slow cruise speeds and for keeping the waterline out of the water in the stern at the dock.

In the right conditions and if I emptied the tank and the cabin I'm sure I could get to 61 knots, but I don't do a lot of WOT operation as I want my passengers to be comfortable.

I'm not using any ventilation on the prop.  It just isn't needed.  The boat leaps out of the hole even with a very heavy load.  I didn't open her out of the hole in the video.  I'm thinking I went to 1/2-3/4 throttle.

Glad you enjoyed it.  I want to make a few more videos...  Stuff to watch when I can't get out on the water.  : )

blackmagic

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Quote:
Originally Posted by steelhead
What are the water pressure and temperature readings 4000>WOT?


I don't have a water pressure sender and the temperature usually hoovers just over the halfway mark at WOT if I remember correctly.
muskiemouth

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Reply with quote  #6 
What is the weight of the hull?
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Huey

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Reply with quote  #7 
Good WOT RPM and yes i have not needed to open the vents on a G2/Rx4 prop combo-they do not lack grunt.
blackmagic

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Quote:
Originally Posted by muskiemouth
What is the weight of the hull?


She's 2000 lbs. dry... Here's a pic...

[image]
Huey

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Reply with quote  #9 
What boating is all about.
Mach1

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Reply with quote  #10 
Not getting your boat picture, Just a blank empty white box.
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blackmagic

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Reply with quote  #11 
Quote:
Originally Posted by Mach1
Not getting your boat picture, Just a blank empty white box.


That's funny.  The same thing happened to me over the weekend, but when I just logged on now, it is showing.  Anybody out there have a suggestion or comment on that?
jzambroski

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Reply with quote  #12 
Hey Blackmagic,

You asked for our opinions on engine height. Well here goes. It kinda looks to me like you could come up another FOOT or TWO? Did you forget to weigh anchor? You look like you're going a might bit slow out there with that skimpy little rooster you were leaving in your wake!!!

Seriously now, (all that aside) I do have a real comment / question. Is your motor bolted on tight? I noticed the whole engine and transom bracket looked like it was constantly flexing quite a bit? I know it must have been a bit choppy but...? Maybe it's just me but, I've never seen one wiggle up & down like that.

I couldn't see the image, either. Just a white blotch. But from your video & audio... it looks like you got yourself a "hum ding-er" of a rig! Just make sure you don't get too many people mad at you for getting them wet from being behind your skimpy little rooster tail!

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blackmagic

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Reply with quote  #13 
Quote:
Originally Posted by jzambroski
Hey Blackmagic, You asked for our opinions on engine height. Well here goes. It kinda looks to me like you could come up another FOOT or TWO? Did you forget to weigh anchor? You look like you're going a might bit slow out there with that skimpy little rooster you were leaving in your wake!!! Seriously now, (all that aside) I do have a real comment / question. Is your motor bolted on tight? I noticed the whole engine and transom bracket looked like it was constantly flexing quite a bit? I know it must have been a bit choppy but...? Maybe it's just me but, I've never seen one wiggle up & down like that. I couldn't see the image, either. Just a white blotch. But from your video & audio... it looks like you got yourself a "hum ding-er" of a rig! Just make sure you don't get too many people mad at you for getting them wet from being behind your skimpy little rooster tail!


I guessing that part of what we see there is transom flex.  But I don't think too many people have seen that exact view of their boat or another boat running at wide open throttle in a chop.  So I wonder if themovement isn't just typical.
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