Fluid Motion Control

For more information, check out Ed Allen’s talk from the 2023 Portland Alt-Az Conference.

Devices

Device	Comment
FRT-E2/E9	Useful for tiny scopes; have very low torque
FRT-G2/C2	Might be useful for small scopes, particularly with reduced ratio installation
FRT-D2	Might be useful for small-to-medium scopes with reduced ratio installation
FRT-L1	Might be useful for small-to-medium scopes with 1-1 installations or small scopes with reduced ratios
FRT-K2/F2	Unsuitable due to motion/backlash from internal design/build tolerances (4 units tested)
FDT-47A	Useful disk-type dampers for small-to-medium scopes with 1-1 installations or larger scopes with reduced ratios. Have passthrough capability and wider temperature range
FDT-57A/63A/70A	Similar to FDT-47A with 1-1 capacity capable of handling even larger scopes. These are physically larger bodied, and have larger square inputs.