Re: The Flyer Crawl?
A couple of additions that I have communicated off list on this subject.
The Flyer motors had double lead worms, that doubled top end speed by reducing the gear ratio 50%. The S-N-S slow speed motor actually just has a single lead worm (on the same can motor used with their double lead motors) the result is doubling the gear ratio and cutting speeds in half at every voltage. My concern is that the single lead worm has a different worm pitch that could cause premature gear wear in the worm gears (axle and smoke piston) designed for the double lead worm used by Flyer. The second option is using a double lead worm with a slower RPM motor. Anyone have a source for a Flyer double lead worm for a 2mm or 2.4mm shaft?
Flyer used universal 7-15 volt motors that would run on both AC and DC. Their transformers were mostly 7-15 volts to match the motors. When Flyer introduced DC motor models they also introduced a rectifier to convert AC to DC. The rectifier loses 2-3 volts so to retain the top end 15 volts for DC motors; Flyer introduced 5-18 volt transformers with the same model numbers as some of their larger AC 7-15 volt transformers. Rather than rectify in the loco, I rectify the power supply with a large diode bridge rectifier and supply DC power to the tracks. Stock Flyer locos with universal motors and reversing units work fine on DC. Only newer locos like Lionel AC and AM AC locos actually require only AC power.
Modern DC can motors start turning around 1.5 - 2 volts DC, universal 7-15 volt motors start turning around 7 volts, AC or DC. I suspect this significant difference in starting voltage produces different results with DC motor controllers (which can be purchased from China on eBay for a reasonable price and with or without PWM, Pulse Width Modulation). I would expect a PWM DC motor controller might work better with a Flyer 7-15 volt motor than a motor controller without PWM. I expect better results from a modern can motor than the old Flyer 7-15 volt universal motor.
I have Timko and S-N-S motors in my inventory. Previously I have tested DC motors for use in HO to O scale models as part of my support of the RepowerAndRegear list (results available at http://shastasprings.com/repower/Motor_RPM_Table-2013.htm)
If there is interest I will test the Timko w/flywheel and S-N-S motors (full speed, half speed, 0-8-0, and Casey Jones) I have on hand.
On 2018-05-15 08:47, Thomas Stoltz wrote: