Speeds of 42 Sonics
12-08-2004, 11:58 AM
#21
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Location: Galveston, Texas
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Re: Speeds of 42 Sonics
What I did to measure my prop centerlines was take a laser level and placed it on the bottom of the cavitation plate. Took the spot on the transom were it hit and measured down to the bottom of the keel, 11 7/8". Then I measured from the cavitation plate to the prop centerline, 8 1/4". took 11 7/8" minus 8 1/4" and got 3 3/4" up from keel for prop centerline.
12-09-2004, 07:51 AM
#22
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Re: Speeds of 42 Sonics
captwk,
I understand how you made your measurement. The only reason I suggested the method I did was your method assumes everyone has the drives the same distance from the center of the boat. If the drives on the boat I measure is a little further then the prop will be a little deeper in the water eventhough it is the same distance from the bottom of the keel. I dought that there is much difference from one Sonic to another but this way tells you how far in the water the prop is.
Seems like your method, using the laser is very accurate. I would suggest doing the same process only shoot it straight forward (right in front of the drive) on the transom and measure down to the bottom of the boat at that location, not the bottom of the keel.
Rick
I understand how you made your measurement. The only reason I suggested the method I did was your method assumes everyone has the drives the same distance from the center of the boat. If the drives on the boat I measure is a little further then the prop will be a little deeper in the water eventhough it is the same distance from the bottom of the keel. I dought that there is much difference from one Sonic to another but this way tells you how far in the water the prop is.
Seems like your method, using the laser is very accurate. I would suggest doing the same process only shoot it straight forward (right in front of the drive) on the transom and measure down to the bottom of the boat at that location, not the bottom of the keel.
Rick
12-15-2004, 11:24 AM
#24
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Re: Speeds of 42 Sonics
The 42 Sonic is an evoloution of my old 38 foot Banana...which then became a Coyote and finally Sonic. You can see photos of this boat running in the photo section.
The boat was all fiberglass. We laid it up very light and came up with a 3800 pound 38 foot boat, hull and deck ready for rigging. The engines I ran were 496 cu in with two four barrel 1050 carbs on each engine. The drives were #3's. Fuel was Av gas.
The fastest we ever saw on the Nordskog speedo was 96mph. In a 205 mile race in the Bahamas we averaged over 83 mph. Remember this was in 1979 and the boat was an all out race boat.
I am sure the quality of the build of a modern day Sonic is very good and much improvement has been done in the area of weight savings. I understand that production boats carry a lot more weight, but I just wanted to let you know what speed the boat was capable of and it was stable at that speed.
Sonic has done a beautiful job in the evolution of this boat and it turns heads everywhere it pulls in. Good luck in your pursuit of more speed.
Charlie McCarthy
The boat was all fiberglass. We laid it up very light and came up with a 3800 pound 38 foot boat, hull and deck ready for rigging. The engines I ran were 496 cu in with two four barrel 1050 carbs on each engine. The drives were #3's. Fuel was Av gas.
The fastest we ever saw on the Nordskog speedo was 96mph. In a 205 mile race in the Bahamas we averaged over 83 mph. Remember this was in 1979 and the boat was an all out race boat.
I am sure the quality of the build of a modern day Sonic is very good and much improvement has been done in the area of weight savings. I understand that production boats carry a lot more weight, but I just wanted to let you know what speed the boat was capable of and it was stable at that speed.
Sonic has done a beautiful job in the evolution of this boat and it turns heads everywhere it pulls in. Good luck in your pursuit of more speed.
Charlie McCarthy
