Carbon Fibre
- Thread starter Judders
- Start date
savageseadog
Well-Known Member
There seems to be quite a number of satisfactory CF masts of reasonable age around? How does the "stiffness" CF reconciled with what I know of CF masts and fishing rods, both of which seem to be perfectly flexible
Ubergeekian
Well-Known Member
Stiffness of a structure results from a combination of material and design. Make 'em thin enough and they'll bend a treat.
boguing
Well-Known Member
CF in it's various flavours (and with right sticky stuff/temp/pressures is fantastic stuff.
You just need to read up on the cases where it failed.
Pete Goss's Philips cat, and various canting keels seem to have failed through insufficient/uncured bonding. In these cases inspection proved difficult. (Until they broke!).
The utterly fanntastic stiffness can cause problems when in a structure incorporating less stiff stuff - foam cores as an example.
It's not great when it suffers impact damage, because it's very hard to survey for damage.
To wrap up my critical comments.
I mentioned conductivity earlier. Has resistance, gets hot, burns. Bit unique in boating terms.
Difficulty in surveying damage. Will the Qantas A380 fly with the old wing repaired - or a new wing?
Friend of mine knows more than a little about this stuff (bit like Seajet). The aforementioned 380 has a Carbon Horizontal Stabiliser, with an Alloy spar. Consider what happens as the Carbon expands and the Alloy contracts in low temps on every flight. We hope that it's allowed for..
Like any other material, find it's limits and have fun.
Reason for Fred Drift is that RR's RB211 got mentioned. My Dad was Chief Engineer on the engine (which has evolved into the Trent 900) and they were really pushing at limits. It was designed to power the L-1011 TriStar, which was the first three engine 'plane to qualify for ETOPS.
He done a good job!
You just need to read up on the cases where it failed.
Pete Goss's Philips cat, and various canting keels seem to have failed through insufficient/uncured bonding. In these cases inspection proved difficult. (Until they broke!).
The utterly fanntastic stiffness can cause problems when in a structure incorporating less stiff stuff - foam cores as an example.
It's not great when it suffers impact damage, because it's very hard to survey for damage.
To wrap up my critical comments.
I mentioned conductivity earlier. Has resistance, gets hot, burns. Bit unique in boating terms.
Difficulty in surveying damage. Will the Qantas A380 fly with the old wing repaired - or a new wing?
Friend of mine knows more than a little about this stuff (bit like Seajet). The aforementioned 380 has a Carbon Horizontal Stabiliser, with an Alloy spar. Consider what happens as the Carbon expands and the Alloy contracts in low temps on every flight. We hope that it's allowed for..
Like any other material, find it's limits and have fun.
Reason for Fred Drift is that RR's RB211 got mentioned. My Dad was Chief Engineer on the engine (which has evolved into the Trent 900) and they were really pushing at limits. It was designed to power the L-1011 TriStar, which was the first three engine 'plane to qualify for ETOPS.
He done a good job!
Bobobolinsky
Well-Known Member
There is no point in replacing flat ply with CF, unless you are building an uber trimaran.
wiggy
Well-Known Member
Back to your question try carbonology, easy to find via Google
