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NoWingsAttached
NoWingsAttached
Unobtainium Member
Last Activity: 12-12-2017, 11:59 AM
Joined: 05-21-2006
Location: Columbia, SC
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  • In closing, this is disturbing on many levels:

    Post #1
    New Approach to Yamaha RX-1 conversion
    04-23-2014, 10:16 AM
    Hello all, I am new to the forum...I am using this forum to find out who may be interested in purchasing a adapter or possibly a complete set up ready to...
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    Last edited by NoWingsAttached; 12-12-2017, 11:54 AM.

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  • It has just come to the attention of many of us on FB last week that Teal had a Rotax hardy disk fail on his first (Honda) conversion, predating the 2014 Yamaha RX1 adapters he fabricated and sells here. And although I became aware of a Yamaha RX1 Skytrax RXC hardy disk failure last April 2017 I found...
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    Last edited by NoWingsAttached; 12-12-2017, 11:37 AM.

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  • The Mohawk GTI [Yamaha YG4i (Apex 150HP fuel injected engine)] adapter sales really took off since I introduced them January 2017 Some folks flying tractor FW wanted a shorter power plant right away, without waiting for my 2015 Silent Drive to be a production PSRU, so I offered them Rotax C...
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    Last edited by NoWingsAttached; 12-12-2017, 10:40 AM.

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  • NoWingsAttached
    replied to Anything new on Yamaha conversions?
    My Mohawk GTI Apex adapters are selling well. Until I get more hours on the Silent Drive the gearboxes I am encouraging my customers to use at this time are Mohawk AK7 - a cousin of the Air Trikes SPG4 with several design changes specific to my adapters. Gears and bearings are the same, but the drive...
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    Last edited by NoWingsAttached; 12-12-2017, 09:58 AM. Reason: change "diameter" to "radius"

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  • I never read up on this stuff, some of it came from what Jake told me while we were discussing designing some headers for the YG4 together since he does all of my welding, other stuff is what I've read casually. Thanks much for the references, I'd like to read up on it more!...
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  • I just realized after going back thru this thread that Teal did post thrust numbers significantly lower than we are getting, but my post above said everyone should be getting the same thing. I don't understand the difference, maybe intake and exhaust? Hard to say.

    I think he was trying...
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    Last edited by NoWingsAttached; 12-09-2017, 03:58 PM.

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  • NoWingsAttached
    replied to Tango Gyro
    I hope the forum admin here adds Tango to the list of gyro manufacturers soon...
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  • NoWingsAttached
    replied to Tango Gyro
    I have flown a variety of tandem gyros: Sno Bird, Air Command CLT and low-rider, Dominator, MTO, and Tango. I am very open about my likes and dislikes. Ask me anything you want, email me at info@mohawkaerocraft.com.

    After Flying the Tango I came away with a list of likes and things I would...
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    Last edited by NoWingsAttached; 12-06-2017, 12:05 PM.

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  • NoWingsAttached
    replied to Tango Gyro
    For 2018 I am now offering a Mohawk AK7 3.47:1 kit which will push the thrust envelope even farther. We are happily comfortable with what the 3:1 did in 2017, now its time to move onwards and upwards and take it to the next level. Boosted Mohawk engines are going be on the horizon very soon, since...
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  • NoWingsAttached
    replied to Tango Gyro
    He is using a 3:1 Mohawk AK7 gearbox and the universal "BMW" donut used with all of the Minsk gearboxes : Tango, Mohawk AK7, and Air Trikes SPG4 - all basically the same gearbox with a few slight variations in shaft lengths and alignment trimmings. Tango and Mohawk AK7 gearboxes are now completely...
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  • NoWingsAttached
    replied to Tango Gyro
    You can get a Tango Gyro built for the Rotax 912/914....
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  • NoWingsAttached
    replied to Tango Gyro
    I am not aware of a lifetime guarantee on a sprague (sic) clutch, although there is a lifetime guarantee provided on my roller ramp clutch. When I offered the roller clutches in January 2017 with a life-time guarantee I meant that I would stand behind it for as long as you own it. I still do, and always...
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    Last edited by NoWingsAttached; 12-06-2017, 09:06 AM. Reason: grammar and sp

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  • When calculating the bearing life, the mfr engineering takes into account two components of force: axial and radial. The double-row angular contact bearings are made to take loads from any direction in a sphere, 360 around, vertical, horizontal, it doesn't matter. Neither does it matter if the axial...
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    Last edited by NoWingsAttached; 12-05-2017, 02:42 PM.

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  • NoWingsAttached
    replied to Kermit continuing flight log
    Excellent work, great to see the Kermit is so GREAT! I see a question earlier about the life of the Rotax C gearbox, and your response about HP.

    In discussing what a particular type gearbox limits are, although it may seem convenient to conversationally express what has been found in the...
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    Last edited by NoWingsAttached; 11-30-2017, 11:29 AM.

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  • NoWingsAttached
    replied to 2 place gyroplane options
    Nah. Here's a link to a funny video on how I got that name, way back in 1959. Then the vid morphs into flying my Honey Bee.

    https://www.youtube.com/watch?v=cVwMfjjS_uk...
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  • Vance,

    I understand you perfectly. My response to your quote ended at the double line, after which I went on to speak in general and add some more, perhaps interesting, information regarding the forces working on the rotor bearings.

    Thanks for the note about the accelerometer,...
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    Last edited by NoWingsAttached; 11-29-2017, 08:35 PM.

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  • Bearing preferences: MRC makes good quality bearings at affordable prices. Timken (also sold as FAG) have really great numbers on the cut sheets, they usually cost a bit more. SKF will work, and is very cheap, but NTN is a far better bearing for about the same price. As requested, here are the different...
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    Last edited by NoWingsAttached; 11-29-2017, 08:42 PM. Reason: Additional info & add quote

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  • SKF is at the bottom of the acceptable class of bearing, but it is acceptable for rotorhead use. (Which reminds me a of a joke we had back in medical school at U of M: What do you call a medical student who graduates at the bottom of his class? "Doctor". That was usually followed with: What...
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    Last edited by NoWingsAttached; 11-29-2017, 03:38 PM.

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  • NoWingsAttached
    started a topic Rotor Bearing Life: Calculate Yours!

    Rotor Bearing Life: Calculate Yours!

    Attached is the "Bearing Life Wksht II.xls", an interactive worksheet which calculates your rotorhead bearing's life with your input of flying weight, rotor speed (RRPM) and your bearing's "Cr" spec as found in the manufacturer's data sheet. I embedded an image of it below so you...
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    Last edited by NoWingsAttached; 11-25-2017, 04:46 PM.

  • Updates to bearing life info! GOOD NEWS, too. I finally found the exact type of ball bearings Rotax C uses: 25mm ID, P/N 6305. The updated math shows that 90% of the bearings will last to 1000 hrs on a RX1 YG4! Whew. I was really worried there at first, using info for a 6205 gave us some pretty...
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