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Home✈️Aircraft🚁HelicopterAudacity Models P6 Pantera - Tiger 50 › Aluminum swahsplate update.
05-22-2007 04:31 AM  13 years ago
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ProModeler

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Sanford, FL (Orlando area)

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Aluminum swahsplate update.
We've been working on an aluminum swashplate for quite some time. This seemingly simple option is consuming huge amounts of time. You see, 120° doesn't really work. Some have advocated a 140° swashplate, but guess what? That's not quite right either! Thus, despite years of making these things, some time cracking the books reveals 135° is what really works. So back to the drawing board for us and the new swashplate is in the works and will soon see the light of day.

This is the protype we learned simply didn't work right.

Here's the CAD drawing of what's coming.

I hope you enjoy a peek at what's going on behind the scenes. These along with working with dealers, updating the manual, creating the website, etc. keep me in a persistent state known as . . .

Mach 2 with my hair on fire!

John Beech
AMA # 47381
IRCHA #745
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05-22-2007 05:14 AM  13 years ago
alcastan

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Cancun, Mexico

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135?
John, and as I remember there is actually no radio that supports 135 ccpm mix, am I right?
correct me if I'm wrong
Alejandro,
Momma used to say, life's like a box of chocolates, you never know what you're gonna get!
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05-22-2007 05:32 AM  13 years ago
racingstripe

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Sacramento, CA

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John,

Why isn't 140 quite right?

If anything, I would have thought you would set yourself apart from the crowd by going with "137.5 degree CCPM"?

alcastan,

true, many radios do not have a pre-packaged "135 CCPM" option. However, all you need is one program mix to make the correction. You can vary the mix percentage to accommodate 135/140/137.5 etc.

andy-
Proofread carefully to see if you any words out.
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05-22-2007 05:52 AM  13 years ago
gian

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AZ

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Ok- learn me... What gets slaved to what in this mix?
Thanks in advance!
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05-22-2007 06:26 AM  13 years ago
Eury

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Dover NH USA

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I dunno the exact answer to your question, but if you do a search in the radio forum, the mix has been posted a couple times. IIRC, the last time I saw it, it was titled something like "140 degree CCPM 9c", or something similarNick Crego

Citizen #0168
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05-22-2007 12:23 PM  13 years ago
CHARGE

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FUTURE PLANET EARTH

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so why doesn't 140 work I have it on all 3 of my 90 size vigors and vibes,and I have 120 on my both of my panteras and both of my tigers,the new swash looks good hope to test it out soon.I hope I can notice a difference.TomA positive outlook is all that is required
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05-22-2007 02:20 PM  13 years ago
ProModeler

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Sanford, FL (Orlando area)

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A fellow I know independently came to me with his research of 120° vs. 140° and how 135° was the real answer, at which point I revealed to him what we had come up with ourselves. Frankly, I wasn't going to get into it and simply planned to offer our 135° swashplate as a "140°" swashplate option and leave it at that.

Anyway, he expressed surprise that we were on top of it, especially when I said something along the lines of, "It's too much trouble to explain and most folks don't give a hoot about the math." I explained further how I didn't want to get the product marketing bogged down in technicalities as there are always skeptics and they might do us harm. Thus, I was planning on leaving well enough alone in this case.

Then he mentioned he was submitting the mathematical proof to a magazine for publishing, which peaked my interest though I seriously doubted the popular press would pick up on it. Then again, occasionally the magazines play a role in raising the conciousness of all of us to many issues, including 120° vs. 140° CCPM, and so I thought to myself, why not go into the differences and explain how 135° is the "right" number? Then on further reflection I said to myself, "Nah, not worth the confusion because 5° is barely noticable and nobody will know the difference - nor care!" Remember, I'm both an engineer and a mathematic teacher and I "know" how quickly people's eyes can glaze over.

Then yesterday, he called to tell me his rather technical article had been accepted for print and thus, I will refrain from explaining further about the whys and limit myself to information about the product itself. His article will hit the streets soon enough. Anyway, it's enough satisfaction to know some pretty good dinkum thinkums are amongst our customers this is a hobby we engage in for fun, so I think the smart thing to do is wait for the results to speak for themselves.

Meanwhile, to be perfectly honest, if I wanted to be rich there are better ways of going about it than making better swashplates and helicopters. The fact is I get my fun out of making these things and getting them right (and doing it at a resonable cost) is just as much fun for me as the flying itself.

John Beech
AMA # 47381
IRCHA #745
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05-22-2007 02:30 PM  13 years ago
gian

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AZ

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EURY- Found it- Thanks! It's "9C can do 140° ccpm" for those interested.
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05-22-2007 03:14 PM  13 years ago
CHARGE

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Thanks JB I will keep my eyes open for the article.always willing to learn something new.TomA positive outlook is all that is required
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05-26-2007 05:50 AM  13 years ago
pertti

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deltona,FL

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This swashplate angle thing sounds mysterious. All the movements
for the swashplate are computed by the radio by few sin and cos
functions and the only thing that can not be controlled is the speed of the change, limited by current servo technology, causing intermediate swashplate positions to be something else than they should.
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05-29-2007 04:34 AM  13 years ago
ole

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South East Minnesota

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I am glad someone did the math, now when can we look forward to getting this new swash plate? I am looking forward to trying a mix to get 135 degrees to work.
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