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Author Topic: Bullet blimp.  (Read 20315 times)

synchro1

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Re: Bullet blimp.
« Reply #75 on: May 01, 2021, 03:12:27 PM »
This ingenious swivel gear pearl is the "Gimmick" pictured below. Inserting a craft stick between slits in the sides of a plastic bottle would anchor the propeller inside the rim to produce a ducted thrust vortex. The pearl allows the rubber band to counter rotate the cycloidal wing while allowing the bearing to spin the propeller too. A thin dowel can hold the rubber band to the back.

synchro1

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Re: Bullet blimp.
« Reply #76 on: May 01, 2021, 04:19:36 PM »
Sodhart glues the soda straw to the top of the soda can. It glues to the craft stick the same way. The pearl acts as a friction gear set between two short lengths of plastic soda straw! This is a master stroke of gimmickery! The pearl ball is actually standing still while both sides are rotating in opposition. A quick and dirty Barrel Gear! The problem with the Pepsi can is that the spiraling fins are catching a reverse back wash from the propeller. Minimized drag and Máximum  vortex thrust achieved when channeled through the center!

This is a "Cyclo Gyro" not a helicopter. We can fashion a couple of cool spiral fins cut from a second bottle. This experimental design will fly ten times better with the propeller inside the rim of the cycloidal gyro wing.
« Last Edit: May 01, 2021, 07:28:37 PM by synchro1 »

synchro1

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Re: Bullet blimp.
« Reply #77 on: May 01, 2021, 07:44:31 PM »
Propellers inside the ring:

synchro1

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Re: Bullet blimp.
« Reply #78 on: May 02, 2021, 04:02:03 PM »
I wrote Siddheath Creations on YouTube and suggested positioning the propeller inside the cone, and he replied and said he will try it! So let's wait for the next upgraded version!

synchro1

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Re: Bullet blimp.
« Reply #79 on: May 02, 2021, 09:01:06 PM »
Ducted 3 blade fan is ideal!

synchro1

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Re: Bullet blimp.
« Reply #80 on: May 03, 2021, 03:53:30 PM »
Replacing the swivel with a counter rotating barrel gear would allow the rubber band to power both the cone and the propeller. The 3 blade propeller would be connected to a wire that passes through holes in the opposite facing gears and the craft stick frame. The top gear would attach to the propeller and the bottom one to the craft stick and the cone. The loose end of the rubber band would connect to a dowel in the rear.

synchro1

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Re: Bullet blimp.
« Reply #81 on: May 03, 2021, 10:24:47 PM »
This counter rotating assembly has a hollow tube that can house a rubber band! A 3D print job is begging.

synchro1

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Re: Bullet blimp.
« Reply #82 on: May 04, 2021, 03:33:44 PM »
This part is all we need! It can attach at the collars to the propeller and cone cross strut.

synchro1

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Re: Bullet blimp.
« Reply #83 on: May 06, 2021, 10:04:26 PM »
4 plastic miter gears and a PVC cross tee can combine to make a counter rotating gear assembly. Two caps can hold the side gears in place!

synchro1

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Re: Bullet blimp.
« Reply #84 on: May 07, 2021, 05:59:35 AM »
4 miter gears assembly :

synchro1

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Re: Bullet blimp.
« Reply #85 on: May 07, 2021, 07:37:15 PM »
These face and barrel gears are at 90 degrees and seat with no frame 🌹One face gear on the cone frame and a second behind the 3 blade propeller would compress the two barrel gears with the rubber band pressure and keep them in place.
The barrel gears are "Free Riding"!The barrel gears are pulled toward the center and the block pushs them off. We should be able to build a working model from toy store parts now.

synchro1

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Re: Bullet blimp.
« Reply #86 on: May 07, 2021, 11:52:43 PM »
This ebay gear package is under $4.00 from China,  and includes a 3 blade propeller the 2 face gears and 2 barrel gears.

synchro1

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Re: Bullet blimp.
« Reply #87 on: May 08, 2021, 04:37:31 PM »
The pale Green face gear on top can attach directly to the back of the propeller. The bottom yellow side to the cone mount. Pressure from the elastic band will keep the barrel gears fixed in position. We may need to widen the center holes in the face gears with a drill. This design could set a distance record fror a wind up rubber band toy aircraft.


https://www.youtube.com/watch?v=xda1WgL9fd0

synchro1

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Re: Bullet blimp.
« Reply #88 on: May 08, 2021, 05:48:44 PM »
Toy gears from Amazon. I can see the matching face and barrel gears in this four dollar toy gear set on Amazon. The cone can be enlarged in diameter to a ring with a slender tube trailing behind for the rubber band. The Cyclo rotor wing area and the propeller diameter can be enlarged or reduced with the extension of the rubber band housing. The " Dragonfly "  Turbo prop cyclo ring! Amphibplanetary Mars flyer.!

synchro1

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Re: Bullet blimp.
« Reply #89 on: January 26, 2022, 08:09:42 PM »
Imagine if Elon Musk adopted these Mercedes aerobatic fins to his heat shield titles.