What is the largest boat ever made with a planing hull?

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KC8QVO

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I'm just curious if anyone knows what the largest boat made with a planing hull is/was? I've seen some mega yachts while staying in a harbor hotel near one of my offices in the past and it got me thinking - some of these ~100ft boats can't possibly plane, can they?
 
Texasmark

Texasmark

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I'm going to say hydrofoil type boats like the ferries running between places like UK and Europe mainland. You have to get up to pretty good speed to be able to successfully deploy the hydrofoils and I would thing 30 mph at least would be required, which would be a planing hull.

Mark
 
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Slip Away

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I assumed the OP was looking for a true planning hull that is always in the water, which is the Riva 122, whereas the Hydrofoil does get good speed, but once up on the foils, most of the planning hull is not in the water.
 
alldodge

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How about a 416 footer
lcs_independence.jpg
 
Watermann

Watermann

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Pershing makes some rather large 100'+ planing hull yachts like this one...

 
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minuteman62-64

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Weren't the WWII PT boats planning hulls? At 90-100 ft. long (not to say I'm that old - just from watching the History Channel and McHale's Navy :) )?
 
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KC8QVO

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rallyart said:
Well, 140' and plenty fast.
http://millenniumsuperyachts.com/millennium-140-specs.html
It holds about 15,000 gallons of fuel but I'm guessing it could burn through that pretty fast.
Click to expand...

Yea, 40kts on twin diesel engines, 70kts combined with twin turbines? Hmm.. I think I'll get one for fishing - that should get me in all the narrow shallow bays and coves just fine. How about a bow mounted trolling motor? I didn't see that in the features/options list.
 
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tomhath

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minuteman62-64 said:
Weren't the WWII PT boats planning hulls? At 90-100 ft. long (not to say I'm that old - just from watching the History Channel and McHale's Navy :) )?
Click to expand...

PT boats were 70-80 ft long, with 3 or 4 1200 HP or 1500 HP engines; they burned around 170 gallons of gasoline per hour at WOT. Needless to say, things didn't end well when a plywood boat carrying that much gas was hit by gunfire.
 
smokeonthewater

smokeonthewater

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I assume you meant EACH....

According to what I could find, fuel burn of the 3 engines in a PT boat was 474 GPH.... probably specifically the early lower hp models... Obviously higher hp models would burn more fuel.
[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular][FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Fuel Consumption
at 40 knots:[/FONT][/FONT]		[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular][FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Top speed at 40 knots, running three engines, 474 gallons per hour. Full fuel load (3,000 gallons) 6.3 hours.[/FONT][/FONT]
[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular][FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Fuel Consumption
at [FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]2000 rpm[/FONT]:[/FONT][/FONT]		[FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular][FONT=Arial,Helvetica,Geneva,Swiss,SunSans-Regular]Maximum sustained speed at 2000 rpm, running three engines, 292 gallons per hour. Full fuel load (3,000 gallons) 10.3 hours, range radius of 259 miles at 35 knots, 518 miles total.[/FONT][/FONT]
 
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Scott Danforth

Scott Danforth

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Many 40 and 50 meter boats that plane. Some will do 70 knots
 
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