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Hydraulic brake conversion for a Yak 50?

 
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jbsoar(at)gmail.com
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PostPosted: Sat Feb 02, 2019 5:17 am    Post subject: Hydraulic brake conversion for a Yak 50? Reply with quote

Fellow Yak-List contributors:
Can anyone share their experiences with hydraulic brakes on a Yak 50?  Are parts or a kit available to make this conversion?  Is the modification worthwhile?
Thank you.

John B


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coolade2(at)gmail.com
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PostPosted: Sat Feb 02, 2019 1:16 pm    Post subject: Hydraulic brake conversion for a Yak 50? Reply with quote

John B I recently sold several brake pedals at auction to Dave Guzman who runs Southwest Aviation in Tulsa, the pedals were designed by Les Crowder and are on several Yak 52s. The Aircraft mod is strait forward, with a sleeve on the axle to accept the Cessna type wheel and brake cylinder, reservoir has been installed in various places. Yak 52TW mounted it forward of the firewall which I believe is best, good luck and feel free to contact me if you have questions—-Ade Hale. Tulsa (918/850 9086).

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On Feb 2, 2019, at 7:05 AM, John B <jbsoar(at)gmail.com> wrote:

Fellow Yak-List contributors:

Can anyone share their experiences with hydraulic brakes on a Yak 50? Are parts or a kit available to make this conversion? Is the modification worthwhile?

Thank you.

John B


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mark.bitterlich(at)navy.m
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PostPosted: Mon Feb 04, 2019 10:46 am    Post subject: Hydraulic brake conversion for a Yak 50? Reply with quote

The hydraulic brake conversion for the YAK-50 designed by Les Crowder originally used a small reservoir on each brake pedal. He also had new axles milled out which replaced the Russian axles and not a sleeve (for the 50). Les experimented with a whole slew of ideas for improving both the 50 and 52, and changed designs several times, so I have no doubt that what you have seen, with a central reservoir is accurate. He also experimented with new valve covers with drains on each that allowed oil to go back into the sump when not running, which then ran to an electric pump that sent all that oil back to the oil tank. Sometimes known as a "Clean Kit", other versions of this exist that just pump the oil from the sump back to the tank. He also designed some of the first early intake tube drain kits. He was a really nice guy, and always a pleasure to speak with. George Coy was also involved with a lot of this and knew Les better than I.

Responding to JB, the modification is worthwhile in two ways:

1. You no longer lose air that you will need to start the engine "next time" by using it up braking the aircraft "this time".
2. Wheel landings in a 50 are relatively easy. Until you need to use any braking while doing so (using the original system). Les Crowder's design used Cleveland wheels and brakes of the same ilk used on a Cessna 180. These are powerful brakes and allow a tremendous amount of braking power when used on a 50, giving an extremely wide range of control.

Mgb

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