# Why no bimetal Shutter?

**URL:** <https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161>\
**Category:** General Yo-Yo\
**Created:** [September 18, 2018, 5:20pm UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161 "2018-09-18T17:20:29Z")\
**Posts on this page:** 5\
**Page:** 6

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**Author:** ![codinghorror](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/codinghorror/32/8052_2.png) [@codinghorror](https://forums.yoyoexpert.com/u/codinghorror)\
**Post date:** [February 25, 2019, 3:04am UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161/104 "2019-02-25T03:04:20Z")

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> [@YoYoExpertGarrett](#):
>
> Just a few free minutes and photoshop.

Wait a minute, you posted

 ![bi-shutter](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/a/3/a/a3a74d4477978acf4d7b49e04ed8e4af468f5242.jpeg)

And the actual real one is

 ![image](https://us1.discourse-cdn.com/flex015/uploads/yoyoexpert1/original/4X/a/9/e/a9e52e526e1bca69bf419d92b13ab4b2219248fd.jpeg)

Ok, yostradamus

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**Author:** ![Evan\_the\_yoyo\_boy](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/evan_the_yoyo_boy/32/65657_2.png) [@Evan\_the\_yoyo\_boy](https://forums.yoyoexpert.com/u/Evan_the_yoyo_boy)\
**Post date:** [February 25, 2019, 3:19am UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161/105 "2019-02-25T03:19:28Z")

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> [@kksimon](#):
>
> the BS Shutter

This is an awesome name for the shutter. I hope Gentry Stein sees this. :joy:

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**Author:** ![MarkD](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/markd/32/40845_2.png) [@MarkD](https://forums.yoyoexpert.com/u/MarkD)\
**Post date:** [February 25, 2019, 3:50am UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161/106 "2019-02-25T03:50:12Z")

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> [@TheThrowingGnome](#):
>
> What about a bi-metal shutter, but use 7075 for the rings? Not sure if this would make much difference or is even possible

It’s possible, and would make a very modest difference. There’s a couple Topyo yoyos that use two different aluminum alloys.

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**Author:** ![Marm](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/marm/32/46204_2.png) [@Marm](https://forums.yoyoexpert.com/u/Marm)\
**Post date:** [February 25, 2019, 4:22am UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161/107 "2019-02-25T04:22:38Z")

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Yeah I was looking at this and thought the same thing :thinking:

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**Author:** ![JWaugh](https://sea1.discourse-cdn.com/flex015/user_avatar/forums.yoyoexpert.com/jwaugh/32/42366_2.png) [@JWaugh](https://forums.yoyoexpert.com/u/JWaugh)\
**Post date:** [February 26, 2019, 12:01am UTC](https://forums.yoyoexpert.com/t/why-no-bimetal-shutter/293161/108 "2019-02-26T00:01:34Z")

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Quantum and Photon I think.

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