Polishing intake manifolds

by Eugene Klimenko in General Tech Discussion 6 years ago

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Re: Polishing intake manifolds

by Eugene Klimenko » 6 years ago

Eugene Klimenko

12 74 1

https://drive.google.com/file/d/1u4-VeiMaF0l3x3xXeqi8O7ldjpzuZ2Vu/view?usp=sharing
https://drive.google.com/file/d/0B9ZeEB_79LEPUFZNbmdoOWNVVDA/view?usp=sharing

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Re: Polishing intake manifolds

by Kevin Stewart » 6 years ago

Kevin Stewart

3 400 1.18k

As a design engineer I can tell you that resource is limited during product development and whilst the engineers try their best to cover everything and design the best product they can, it is never perfect. There is always a list of outstanding actions or improvements that cound never be completed during the main development.

After produciton release, designs are only modified if there are major problems in the field, obsolescence or risk from a competitor. All this has to be paid for by someone and so nothing more than the bear minimum is done. Sometimes you might be lucky, the engineers may manage to persuade management that they can mop up some other issues whilst carrying out a scheduled change and the improvement you wanted gets included.

With any design change comes risk. Sometimes you are better of staying with what you have rather than introducing new problems. Appetite to improve old products diminishes with time as newer products have issues that have to be attended to.

I have no idea whether the designers investigated the effect of different diameter balance tubes. It is possible that they did and it is possible that they chose the current size in order to meet various design requirements. Unless you have a copy of the original requirements and design specifications you will never know the rationale behind the design decisions. This will be closely guarded proprietary information only known by the immediate design team and the safety assessor.

For these reasons it is always difficult to make design changes as an external 3rd party since you can never carry out a full and complete impact assessment. You therefore run the risk that your change has a negative impact on an important requirement. Hopefully this will not be a safety or compliance requirement which are not always obvious.

Don't get me wrong, I love second guessing my colleagues as much as anyone else but you have to be aware of the potential consequences...

Thank you said by: Ken Ryan, Eugene Klimenko, RotaxOwner Admin, Bill Hertzel

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Re: Polishing intake manifolds

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.97k

Also from my experience in the product engineering and marketing world...
The engineers will attempt to modify and perfect the design until the end of time.
This means that the project will never be completed.
At some point, someone says, "it is good enough as it is, we need to start selling these things."

There is an old engineering adage that pretty well sums it up...
"At some point, you just have to Shoot the Engineers and Start Production."

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Thank you said by: RotaxOwner Admin

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Re: Polishing intake manifolds

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.97k

... I will stop and talk to them at Oshkosh, maybe they will explain the pros and cons of installing large size balancing pipe. Just like everybody else, I like to think that in the process of developing this engine, they did tests with different tube sizes...

Eugene,
Did you make it to Oshkosh?
What did "Rotax" Have to say?

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: Polishing intake manifolds

by Eugene Klimenko » 6 years ago

Eugene Klimenko

12 74 1

No, I didn't. In July we found urself in the middle of another project, called brest cancer. Maybe next year.

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