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What brand uprights have accelerated action?
#2444529 07/25/15 09:07 PM
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Generally speaking can you guys name some brands that have historically made uprights that have a quick action?

I currently have a Kawai console model with pretty damn slow action.

I've read about Steinway's accelerated action. Is that on their grands only? If not, does it include their older Steinway models and Boston & Essex brands?

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Re: What brand uprights have accelerated action?
DeadPoets #2444540 07/25/15 10:12 PM
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The Fandrich & Sons equipped with Fandrich vertical action

Re: What brand uprights have accelerated action?
DeadPoets #2444544 07/25/15 10:27 PM
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Old Mason & Hamlins. However, the original repetition springs have usually collapsed and it is hard to replace them.


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Re: What brand uprights have accelerated action?
DeadPoets #2444627 07/26/15 01:18 PM
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The old Steinway uprights with the designation; "Vertigrand" has the string plane tilted slightly back from vertical. This allowed for a more favorable center of gravity, (CG) on the hammer butt assembly towards returning the hammer from the string. They also had very light hammers which helps the CG issue.

In the late 1940's and early 1950's both the American action makers Pratt-Read and Woods and Brooks made what I call a "pusher jack" action. The hammer CG was very good for return. Piano makers put them in small consoles which didn't do much to help serious pianists. These pusher actions had to be more expensive also. I have one in an Everett console that has the damper action separate from the hammer action. Unfortunately the scale design of the Everett is poor and getting it to top performance would be a very expensive rebuild process. So it sits in my "museum".

I have done a couple of standard uprights where I use a tapered carbon fiber hammer shank which allows very narrow, (and thus light) hammers which then allows insertion of a small amount of solder into the catcher to serve as a counterweight whose position improves CG of the hammer. The shanks are expensive to make.


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Re: What brand uprights have accelerated action?
Ed A. Hall #2444693 07/26/15 06:06 PM
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Originally Posted by Ed A. Hall
The Fandrich & Sons equipped with Fandrich vertical action
Also the Fandrich.


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Re: What brand uprights have accelerated action?
DeadPoets #2444739 07/26/15 10:53 PM
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No idea if this is the same thing (and I've never seen one) - but I read recently the PianoBuyer profile for SAUTER states:

"The larger verticals use an action, designed and patented by Sauter, that contains an auxiliary jack spring to aid in faster repetition. Sauter calls this the R2 Double Escapement action. (Although the term double escapement does not apply here as it has historically been used, the mechanism has some of the same effects.)"


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Re: What brand uprights have accelerated action?
DeadPoets #2444740 07/26/15 10:56 PM
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Re: What brand uprights have accelerated action?
DeadPoets #2444764 07/27/15 01:01 AM
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As mentioned by Backto Study Piano, Sauter's RR action is designed to accelerate action response using an extra spring. It's available on several 122 cm and 130 cm models, and I've heard from a couple of sources that it's actually installed in models that don't even charge a premium for it. The RR has been around for 50 years with some improvements along the way.

Seiler has an SMR (super magnet repetition) action which uses magnets that repel each other to accelerate key return. However, it's only available on their most expensive vertical (132 cm.) and it's a special order. The SMR has been around for 20 years.

I don't know if 20 years or even 50 years makes these actions historic, but they are super fast.


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