Front View	Rear View
Left Side View	Right Side View

Technical Details

Carroll Bassett gave me his Bassett Metal Studios Electric M.A.D. in 2023.

The Bassett Metal Studios Electric M.A.D. is 288 mm. tall, 158 mm. wide, 138 mm. thick, and weighs 6040 g.

This ascender uses a prototype Dumore Corporation PR00021 permanent magnet gear motor. The motor draws 5.5 A FLC at 24 V DC, and produces 60 in–lbf (6.8 N–m) torque at 36 rpm through a worm drive. A cable connects the motor to a 150x100x55 mm. black box (not shown) containing a circuit board and supporting two terminals on its surface. Two wires connect the motor to a control box with an on-off switch and a speed control lever. This box is connected to a terminal box by a lamp cord.

Carroll mounted the motor on a 1/4" (6.35 mm.) aluminum plate using an aluminum angle bracket. He mounted the control box directly to the plate. The terminal box is mounted to the control box. The circuit board box hangs free.

Carroll attached a V-pulley to the worm drive output. This V-pulley is 64 mm. in diameter with a 32 mm. minor diameter. It has 12 semicircular grooves on each side. A 60 mm. U-groove idler pulley sits above the drive pulley.

There is a 40 mm. long, 16 mm. diameter post attached to the top of the ascender with a hex cap screw.

The main attachment eye is bent from 9.5 mm. 304 stainless steel. The teardrop-shaped eye is welded, 37 mm. tall, and 20 mm. wide. The other end is bent 90° and secured to the aluminum plate with a 3/8"-16 UNC lock nut. A 1.5 mm. stainless steel plate with a secondary eye is held in place by this nut.

The motor has two nameplates that provide information already summarized.

Comments

I have not had a chance to test this ascender because I don't have a suitable battery at the moment.

Carroll told me that this ascender did not give adequate performance, and attributed this to the batteries available at the time. I'm curious to see how well it will work with modern batteries. From the nameplate data, I can easily calculate that the motor is relatively underpowered compared to typical gasoline engine ascenders.

Dumore's web site provides general information but no specifics for this prototype. I've written to them, trying to get additional technical information about this specific motor.

The top post was for attaching a progress capture ascender. Carroll used a Rock Exotica Rescucender.