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Author Topic: Show Your Newest Creation  (Read 91452 times)
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climber
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« Reply #1300 on: February 26, 2019, 03:38:01 PM »

ffkiwi wrote:

> Some more details on the timer setup-components etc and the method of programming it would be appreciated.

The controller is an Atmel Tiny 45 in the tiny 8-TSSOP package.  It's programmed through a little 6 pin connector tab with ground, reset, VCC, and three programming lines, MISO, MOSI and SCK.  At least, that's how I upload firmware.   To adjust the D/T time I have a little external controller I use at the field with a potentiometer forming a voltage divider leading to one of the analog to digital converters.  I set up the firmware so that this voltage can give me 10 choices of time to pick from.  Usually from 30 seconds to 180 seconds and a five second test mode.  An LED on board flashes at me to indicate the time I've chosen and to let me know the D/T has been activated. 
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climber
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« Reply #1301 on: March 23, 2019, 11:11:05 PM »

My Mr. Smoothie peanut all done!  And, my winding tube I use with it.

The bits of wire are roller hooks.  I wind the motor outside with one end on the roller hook all hooked up with the stooge and the other on the winder.  When done, I put the roller hook into the winding tube and hook the prop up to the other end.  I load the winding tube rotated 90 degrees and turn it to the right to hook the roller hook on to the motor peg.  I can withdraw the winding tube, install the noseblock and off I go.
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OZPAF
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« Reply #1302 on: March 25, 2019, 05:00:23 AM »

That's pretty clever. I'm curious as to why the second wire piece with the small loop is needed?

John
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climber
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« Reply #1303 on: March 25, 2019, 11:54:29 AM »

OSPAF wrote:

> I'm curious as to why the second wire piece with the small loop is needed?

They are both versions of roller hooks.  The one on the left is older and the one on the right is what I am making now.  I found that the one on the left would fall out when I pulled the motor out of the airplane.  Even if I tightly braided the motor I would still lose it.  The hook with the little loop on the right stays put and works quite nicely. 
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OZPAF
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« Reply #1304 on: March 25, 2019, 08:53:50 PM »

Thanks Climber. Definitely filed for future use.

John
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billdennis747
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« Reply #1305 on: May 18, 2019, 05:13:25 PM »

Finished the Eddie Riding Bristol. It's taken longer than it should because I've built it twice; two sets of wings, tail and rudder (warped to hell) replacement centre section. It's a very flimsy device but came out at 13.7 oz which is 4.0 oz/sq ft and balanced perfectly. It glides nicely so I'll go to Barkston tomorrow and throw it at the scenery. Looking forward to running the Amco .87
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billdennis747
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« Reply #1306 on: May 20, 2019, 05:23:26 AM »

I couldn't get the Amco to run consistently but it was enough to see the trim is pretty well spot on. At 4oz/sq ft I could almost jog alongside it. Nothing flies as well as a rubber scale model converted to diesel, but they are on the flimsy side.
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Squirrelnet
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« Reply #1307 on: May 20, 2019, 08:55:51 AM »

Glad to hear the Bristol flies well, look forward to seeing in the air soon.

Shame the Amco is inconsistant, my impression was they were pretty good. Is that through rose-tinted nostalgia or does it need some work?

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billdennis747
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« Reply #1308 on: May 20, 2019, 09:37:28 AM »

Chris, this engine last flew in the late 60s/early 70s, in Eric Coates' Blackburn White Falcon. He replaced it with a Mills 75 so perhaps it was clapped out then! I shall hand it over to an engine magician - it may need a rebore.
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