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Title: Catapult launcher for Skywalker X8 Post by: sbajare on November 24, 2014, 04:21:42 PM hi,
built a catapult launcher for skywalker x8 using locally available materials. boom is 8ft x 50mm sq. aluminium, ball bearings and aluminium strips. used heavy duty catapult rubber. total pull is 16 kgs. now increased to 22kgs. tested on field and result was fantastic. plan on refining the design and make it better. pics below will upload video in short time Title: Re: Catapult launcher for Skywalker X8 Post by: ashok baijal on November 24, 2014, 06:59:20 PM Great. {:)}
Waiting for video 8-) What is the source of the catapult rubber? Title: Re: Catapult launcher for Skywalker X8 Post by: sanjayrai55 on November 24, 2014, 07:04:42 PM Nice one Sandeep. Did you use surgical rubber?
Title: Re: Catapult launcher for Skywalker X8 Post by: iamahuman on November 24, 2014, 08:14:29 PM I'm guessing it's bungee cord?
Title: Re: Catapult launcher for Skywalker X8 Post by: sbajare on November 24, 2014, 10:03:01 PM 20mm dia rubber tube used for making catapult. this rubber has fantastic flexibility. costed 120rs for 3ft.
used 2nos but length reduced to maximise pull. trial pull showed 8kg torque. now increased to 11.5kgs as I plan to add 1kg payload. regds Title: Re: Catapult launcher for Skywalker X8 Post by: sbajare on November 25, 2014, 01:21:51 PM hi,
pics below Title: Re: Catapult launcher for Skywalker X8 Post by: allthatido on November 25, 2014, 01:44:44 PM We need a video Sandeep ji..photo doesn't do justice to this creation
Title: Re: Catapult launcher for Skywalker X8 Post by: K K Iyer on November 25, 2014, 02:34:16 PM @sbajare,
That ball bearing idea is fantastic! As usual you come out with something new every few months. Great. More photos please. Not able to see: - carriage restraint mechanism at full cock - carriage release mechanism - method of retaining model on the carriage - what happens when the carriage hits the forward stop Regards. Title: Re: Catapult launcher for Skywalker X8 Post by: sbajare on November 25, 2014, 10:26:39 PM hi,
trying to edit video and upload same. Iyer sir, will post details with pics. right now busy wit trials. there is a pin locking the carriage. releasing is simply by pressing lever. the cradle hits the front legs but working on damping the hit by using springs or rubber stopper. regds Title: Re: Catapult launcher for Skywalker X8 Post by: sbajare on November 26, 2014, 11:53:05 AM http://youtu.be/_5eXaOcoy1Q (http://youtu.be/_5eXaOcoy1Q)
video as per request Title: Re: Catapult launcher for Skywalker X8 Post by: manojswizera on November 26, 2014, 12:39:21 PM Awesome sandeepji. :hatsoff:
Title: Re: Catapult launcher for Skywalker X8 Post by: K K Iyer on November 26, 2014, 12:47:55 PM Great job {:)}
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