Panel H6 question

 Posts: 6
 Joined: February 13th, 2012, 7:22 pm
Panel H6 question
The Explorer plans show H6 as being 94" long by 56.6" wide with the standard build. If taking the Explorer to 22' from the 18.5', that means H6 is now 136" long. Is that correct? Bryan you mentioned when stretching it, that the width is taken up to 11' with the diesel. Does H6 increase in width by 12" then, or is that taken up by the skirt dimensions later? Jim
Re: Panel H6 question
For a 22' craft you would add 18" and 24" to the middle of the craft, including H6.
To be precise, I scaled the 20x10 craft to 22x11 by multiply all dimensions by 1.1, except a few things like the fan diameter. The advantage with scaling is the crafts handling characteristics are retained. Hover height increases, skirt gets bigger, cockpit wider and longer, etc.
A stretched craft tends to be more prone to rolling, high centering on waves, land transitions and so forth.
To be precise, I scaled the 20x10 craft to 22x11 by multiply all dimensions by 1.1, except a few things like the fan diameter. The advantage with scaling is the crafts handling characteristics are retained. Hover height increases, skirt gets bigger, cockpit wider and longer, etc.
A stretched craft tends to be more prone to rolling, high centering on waves, land transitions and so forth.
Bryan
http://sevteckits.com
http://sevteckits.com

 Posts: 6
 Joined: February 13th, 2012, 7:22 pm
Re: Panel H6 question
Could you clarify how the 18" / 24" is placed? Do you mean add 24" to the length of H6 and 18" to width?
Re: Panel H6 question
Hello,
Maybe I can help to clarify this: The Explorer plans as you see them are basically set up for building an 18 foot craft. If you look at the bottom of DWG2, lower right corner within the SEVTEC label you'll see a notation that says "ADD 18IN MIDSHIP FOR 20 FOOT HULL." I think Bryan is making this note by first suggesting the 18" which brings you to the proper 20' measurement. Now, I'm guessing the 24" just represents the additional two feet you're asking about. In total you'd include an additional 42 inches for the 22 foot design. The plans suggest that you add this amount midship, which would also effect the length of the H6 panel (adding 42" to it).
He's also suggesting that if you're going to extend the hull to 22 feet you might consider increasing the hull width to 11 feet as well.
Maybe I can help to clarify this: The Explorer plans as you see them are basically set up for building an 18 foot craft. If you look at the bottom of DWG2, lower right corner within the SEVTEC label you'll see a notation that says "ADD 18IN MIDSHIP FOR 20 FOOT HULL." I think Bryan is making this note by first suggesting the 18" which brings you to the proper 20' measurement. Now, I'm guessing the 24" just represents the additional two feet you're asking about. In total you'd include an additional 42 inches for the 22 foot design. The plans suggest that you add this amount midship, which would also effect the length of the H6 panel (adding 42" to it).
He's also suggesting that if you're going to extend the hull to 22 feet you might consider increasing the hull width to 11 feet as well.
Guy Fichtelman
Sevtec Builder and Pilot since 2001.
http://www.hovercrafter.com
https://www.facebook.com/Hovercrafter

 Posts: 152
 Joined: February 14th, 2012, 3:51 am
Re: Panel H6 question
If you take the normal 18.5 foot hull then add in 18" mid ship as already stated you get the 20 foot hull.
If you multiply all the panels of the 20ft hull by 1.1 it will increase the hull size to 22' X 11'.
Take H6 as an example:
It starts off with dimensions 94" X 56.6" . Add in 18" to the centre and it becomes 94" + 18" = 112". H6 would now be 112" X 56.6" this would be the normal floor pan for a 20 ft hull.
For 22 ft hull you need to increase all the panel sizes by 1.1, so H6 would be 112" X 1.1= 123.2" and 56.6" X 1.1 = 62.26". H6 now would be 123.2" X 62.26"
Apply the same principle to all the other panels on the craft and the skirt, but not the fans & you end up with the 22' X 11' craft.
I had considered building the 22 foot craft for myself, but figured it would be a lot of work scaling up the skirt and would be very easy to miscalculate a panel size somewhere, so I stuck with the 20 foot hull for my current build.
Basically the scaling up keeps the overall dimensions to a 2:1 rectangle 20' X 10' now becomes 22' X 11' so the handling characteristics of the craft remain the same. Look through the sizes of the sev range, they basically use a 2:1 rectangle configuration.
If you multiply all the panels of the 20ft hull by 1.1 it will increase the hull size to 22' X 11'.
Take H6 as an example:
It starts off with dimensions 94" X 56.6" . Add in 18" to the centre and it becomes 94" + 18" = 112". H6 would now be 112" X 56.6" this would be the normal floor pan for a 20 ft hull.
For 22 ft hull you need to increase all the panel sizes by 1.1, so H6 would be 112" X 1.1= 123.2" and 56.6" X 1.1 = 62.26". H6 now would be 123.2" X 62.26"
Apply the same principle to all the other panels on the craft and the skirt, but not the fans & you end up with the 22' X 11' craft.
I had considered building the 22 foot craft for myself, but figured it would be a lot of work scaling up the skirt and would be very easy to miscalculate a panel size somewhere, so I stuck with the 20 foot hull for my current build.
Basically the scaling up keeps the overall dimensions to a 2:1 rectangle 20' X 10' now becomes 22' X 11' so the handling characteristics of the craft remain the same. Look through the sizes of the sev range, they basically use a 2:1 rectangle configuration.

 Posts: 6
 Joined: February 13th, 2012, 7:22 pm
Re: Panel H6 question
Ok now I got it, this makes a whole lot more sense now Thank you for taking the time to explain that one. Maybe an Excel spreadsheet with all the dimensions of the standard, 20' and 22' machines would help. Hmnn, I see another late night  but got a early customer in the morning...
highlandhovercraft wrote:If you take the normal 18.5 foot hull then add in 18" mid ship as already stated you get the 20 foot hull.
If you multiply all the panels of the 20ft hull by 1.1 it will increase the hull size to 22' X 11'.
Take H6 as an example:
It starts off with dimensions 94" X 56.6" . Add in 18" to the centre and it becomes 94" + 18" = 112". H6 would now be 112" X 56.6" this would be the normal floor pan for a 20 ft hull.
For 22 ft hull you need to increase all the panel sizes by 1.1, so H6 would be 112" X 1.1= 123.2" and 56.6" X 1.1 = 62.26". H6 now would be 123.2" X 62.26"
Apply the same principle to all the other panels on the craft and the skirt, but not the fans & you end up with the 22' X 11' craft.
I had considered building the 22 foot craft for myself, but figured it would be a lot of work scaling up the skirt and would be very easy to miscalculate a panel size somewhere, so I stuck with the 20 foot hull for my current build.
Basically the scaling up keeps the overall dimensions to a 2:1 rectangle 20' X 10' now becomes 22' X 11' so the handling characteristics of the craft remain the same. Look through the sizes of the sev range, they basically use a 2:1 rectangle configuration.