Thread Tools
This thread is privately moderated by VicT, who may elect to delete unwanted replies.
May 23, 2019, 05:56 PM
Registered User
Thread OP
Mini-HowTo

Motor glider cowl for Turbo Timber


I purchased a spare cowl and made a ply firewall to fit a 55 mm O.D. Aluminum Turbo Spinner. A yoke and collet matches it and holds 10x6 folding blades. A bungee ensures positive blade retraction. Extension is symmetrical avoiding start up imbalance loads. Heat damage from the sun warped the black painted plastic and it was removed and replaced with clear .012 inch thick plastic from a pastry container. Canopy glue was used to glue the clear to the white plastic and for screening over the turbine duct openings.

Dive performance with power off is increased due to reduction in prop drag. With a 4S 1500 100C pack amp draw is only 33 amps with 470 Watts of power. On a 20 second full power climb at 80 degrees (SAFE selected On) she climbed to an estimated 1000 ft and after trimming for a 200 ft left hand circle stayed at altitude for 10 minutes power off!

An ISDT BC 8-S shows battery remaining in percentage and in voltage. It can be viewed while running up the motor while straddling the fuselage from behind the prop.
Sign up now
to remove ads between posts


Quick Reply
Message:
Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Decent 4s brand for a Turbo Timber? paulwgraber Electric Plane Talk 5 Apr 29, 2019 08:20 PM
Discussion Timber X or Turbo Timber ttaylor63 Electric Plane Talk 4 Mar 16, 2019 11:08 PM