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As some of you have seen, I am working on a wood kit of a single motor P open class cat.
I have been updating the plans, building and modifying the shockerman plans since 2008, and end goal is to make a laser cut kit available to you all.
By now, there is not much about the original plans that hasn?t been modified.
The work has really picked up since COVID, when I started working with a friend who has a 2D CNC machine. In the past two years, I have built 4 iterations; the first one not even getting skin before a redesign killed it.
The second one got abandoned after I started really not liking the huge flat deck and getting too heavy, now it is sitting in its almost complete primer in the boneyard. 14.5 in wide and 5lb just the hull. (First pic)
The third turned into a twin when I couldn’t get the COG far enough back, partially due to removing the overhang (effectively moving the cog back .75inch) and more significantly, lowering the rear deck too much. (Second pic)
The fourth is almost ready for sealing. 13in wide and still tough to get cog much under 33%. And, now I’m concerned about weight.. she will likely tip just over 4lb before hardware when all sealed up.
What weight is a good range for a hull to be single motor P racing? I know this has a long list under the “it depends” reply..
I have noticed a big one is altitude; specifically air density. Here in mile high land, air is thin and dry.. opposite of Houston racing.
Next is how much lift the hull produces. Tunnel dimensions and how much and how fast it rises above the baseline towards the front.
Then the sponson design, and on and on.
Is 4lb too heavy or normal for a p cat bare hull?
I have been updating the plans, building and modifying the shockerman plans since 2008, and end goal is to make a laser cut kit available to you all.
By now, there is not much about the original plans that hasn?t been modified.
The work has really picked up since COVID, when I started working with a friend who has a 2D CNC machine. In the past two years, I have built 4 iterations; the first one not even getting skin before a redesign killed it.
The second one got abandoned after I started really not liking the huge flat deck and getting too heavy, now it is sitting in its almost complete primer in the boneyard. 14.5 in wide and 5lb just the hull. (First pic)
The third turned into a twin when I couldn’t get the COG far enough back, partially due to removing the overhang (effectively moving the cog back .75inch) and more significantly, lowering the rear deck too much. (Second pic)
The fourth is almost ready for sealing. 13in wide and still tough to get cog much under 33%. And, now I’m concerned about weight.. she will likely tip just over 4lb before hardware when all sealed up.
What weight is a good range for a hull to be single motor P racing? I know this has a long list under the “it depends” reply..
I have noticed a big one is altitude; specifically air density. Here in mile high land, air is thin and dry.. opposite of Houston racing.
Next is how much lift the hull produces. Tunnel dimensions and how much and how fast it rises above the baseline towards the front.
Then the sponson design, and on and on.
Is 4lb too heavy or normal for a p cat bare hull?
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