6. What turbine caps do I use for extended VT?
Most of our turbine caps are not rated for the full VT range of the probe. GFT caps have the widest VT range. For use at XVT the GFT caps may have to be glued in. Glue the caps into the rotor with a good high temperature epoxy. The caps will then have to be drilled out to remove from the rotor so the caps would definitely be one-time use.
(For some of our early probe models, to achieve spinning at the extreme limits it is necessary to use an axial screw turbine cap in most cases. This is a set of turbine caps with a screw running through the center of the rotor from one turbine cap to the other. This screw is inserted into one of the turbine caps and put into the rotor. The other cap threads onto the screw and is pulled tightly into the rotor at the same time. With this arrangement the caps can not get loose and come out of the rotor while it is spinning.)
Please refer to the MAS Spinner Assembly Materials page for more details concerning rotor and cap choices.
