perimeter stringer blanks

General Discussion
1

ok does any one know/remember the company that has perimeter stringer blanks with walker foam on the rails? if so please give me a link

2

Airframe makes them. PM him.

Rio

3

Ken (airframe) with segway composits http://www.segwaycomposites.com/

The perimeter stringer blanks are Gregg Lohr’s but you get them either from Ken or hank at Graphite Masters.

Graphite Masters is selling Ken/Gregg’s blanks. They will deliver glass, blank and RR epoxy in So Cal.

4

I am making the parabolic stringer blanks, but have converted to all EPS foam. They can be built either with a combination of 1 lb, 1.5 lb, or 2 lb foam in the core and 3 lb EPS foam on the rails. The other option is to build the whole bank of the same density foam, such as 2 lb or 2.5 lb. Your call… Just keep in mind that the single density blanks will be a bit less cost, as I don’t have to cannibalize two blanks to make one… To date, the only sizes I make are in the 6’0" to the 6’8" range…

   Thanks!!! 



      Ken
5

oh i didn’t care if was PU on the rails i just used that as an identifying feature. could i get a blank with all 3lb density?what about customized rockers?

6

if I may ask rider…

why 3lb?

have you defined your design goals?

if so, does 3lb offer the best way to achieve those goals?

i ask b/c lower density foam (2 or 2.5) might be your best bet.

correct me if im wrong airframe, but a full 3lb blank would benefit the least from the use of p-stringers, right?

7

I think you are probably correct on the assumption that 3 lb might be a bit overkill. As these are some new parameters, I can’t say for sure what the end result might be. Having said that, I feel the designer should make the best decision for their design, and do what they feel is best. In my earlier post I suggested the 2 lb or 2.5 lb for that reason, but again, that should be an individual decision. As for the sizes, you can look on the Segway web page, and the parabolic blanks available will be based on Greg’s LD-02 and LD-04 series rocker templates. At some time in the future, I may be able to expand the design to other templates. but at the moment my plate is too full to embark on those additions.

 Thanks for asking! 



    Ken
8

That’s really a question for Greg, he is the one with the idea to use varying densities on the rails and in the core…he runs the stringers inboard a coupla inches and needs to stiffen the rail, so he uses higher weight foam there. The bonus to running the stringers in there is that the rail fins mount right on the stringer so you don’t need a stupid suspension system for the rail fins…the rear fin you will need something though, but you probably won’t notice.

Make sure you fully infuse the rail foam…