Question to you 650 guys on Vne - Zenith Aircraft Builders and Flyers2024-03-29T08:28:15Zhttps://zenith.aero/forum/topics/question-to-you-650-guys-on-vne?feed=yes&xn_auth=noGeorge, Thank you for asking…tag:zenith.aero,2020-12-30:2606393:Comment:7975202020-12-30T01:36:53.266ZRon Hansenhttps://zenith.aero/profile/RonHansen
<p>George, Thank you for asking this question and thank you to everyone else who provided honest non company line answers. I just joined the group planning to ask this exact question as I don't know of any other kit plane that advertises their cruise speed to be the same as Vne. I flew a factory demo ride with Roger a long time ago (prior to the "B" thing) and noticed he never got close to 160 IAS, but assumed he was just keeping the throttle back since we never went more than about 8 miles…</p>
<p>George, Thank you for asking this question and thank you to everyone else who provided honest non company line answers. I just joined the group planning to ask this exact question as I don't know of any other kit plane that advertises their cruise speed to be the same as Vne. I flew a factory demo ride with Roger a long time ago (prior to the "B" thing) and noticed he never got close to 160 IAS, but assumed he was just keeping the throttle back since we never went more than about 8 miles from the airport. It's both bothersome and a relief that the factory is publishing a badly exaggerated cruise speed that won't actually put me 1 MPH away from being a test pilot. I dreamed of a 601-HD, then a 601-XL, then a 650, was briefly distracted by the Cruzer, and now I'm finally in a good position to either get started or buy one that's already built. If I do end up building, a Viking 130 will be hired to play Rudolph for my new sleigh. One safety concern on that decision was having too much snort if it could easily overspeed the aircraft. Apparently, that's just not something to worry about. </p> I named my 3rd child Grace. L…tag:zenith.aero,2020-08-04:2606393:Comment:7309582020-08-04T01:02:22.669ZGeorge Burnshttps://zenith.aero/profile/GEORGEWBURNS
<p>I named my 3rd child Grace. Luckily, nobody her age knows enough to tease her about it.</p>
<p>I named my 3rd child Grace. Luckily, nobody her age knows enough to tease her about it.</p> Say hello to Gracietag:zenith.aero,2020-08-03:2606393:Comment:7309232020-08-03T19:41:24.471ZDavid Krakowskyhttps://zenith.aero/profile/DavidKrakowsky
Say hello to Gracie
Say hello to Gracie I agree with everything you a…tag:zenith.aero,2020-08-03:2606393:Comment:7308922020-08-03T15:48:53.177ZGeorge Burnshttps://zenith.aero/profile/GEORGEWBURNS
<p>I agree with everything you are saying. I guess what I'm getting at is, it just seems "sketch" as the kids would say these days. And I need look no further than the design and performance specs on the CH-640 to show you what I mean. Max Cruise speed (Vc) is listed at 160mph, while Vne is listed @ 175mph. That's a 15mph safety buffer. MY POINT IS..... there IS no such buffer for the 650. …</p>
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<p>I agree with everything you are saying. I guess what I'm getting at is, it just seems "sketch" as the kids would say these days. And I need look no further than the design and performance specs on the CH-640 to show you what I mean. Max Cruise speed (Vc) is listed at 160mph, while Vne is listed @ 175mph. That's a 15mph safety buffer. MY POINT IS..... there IS no such buffer for the 650. </p>
<p><a href="http://www.zenair640.info/performances--specifications.html">http://www.zenair640.info/performances--specifications.html</a></p>
<p><a href="http://www.zenithair.net/specs-ch650/">http://www.zenithair.net/specs-ch650/</a></p>
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<p>Note* NOW I SEE IT!!! The max cruise for the 650 is listed @ 138mph. Then they throw that 75% cruise @ 8000ft = 160mph TAS line in there. Which is what got me asking the question in the first place. I think Ian Robb has the most appropriate answer here. That 160 TAS is the crux of the issue. </p> Each design has an envelope o…tag:zenith.aero,2020-08-03:2606393:Comment:7308772020-08-03T13:41:49.992Zchristopher fryatthttps://zenith.aero/profile/christopherfryatt
<p>Each design has an envelope of operation. The designer provides the load envelope of what's shown in plans. You couple exceed recommended limits and yes you have become a test pilot, id wear a chute and find some generous insurer for life insurance ( of course the T.P. may not care about family, certainly little respect for those below )</p>
<p>Each design has an envelope of operation. The designer provides the load envelope of what's shown in plans. You couple exceed recommended limits and yes you have become a test pilot, id wear a chute and find some generous insurer for life insurance ( of course the T.P. may not care about family, certainly little respect for those below )</p> Hi George
I’m not following y…tag:zenith.aero,2020-08-01:2606393:Comment:7307062020-08-01T23:58:55.686ZDavid Krakowskyhttps://zenith.aero/profile/DavidKrakowsky
Hi George<br />
I’m not following your question.<br />
Who, what, why, when, where???<br />
I own a 601XLB that was factory built by AMD, who are no longer in business.<br />
The 601/650 are not usually able to attain those air speeds. There may be a couple of high power planes that exist that may be able to reach those speeds, if there are I would hope they would join in the conversation.<br />
Dave
Hi George<br />
I’m not following your question.<br />
Who, what, why, when, where???<br />
I own a 601XLB that was factory built by AMD, who are no longer in business.<br />
The 601/650 are not usually able to attain those air speeds. There may be a couple of high power planes that exist that may be able to reach those speeds, if there are I would hope they would join in the conversation.<br />
Dave The only unreasonable one is…tag:zenith.aero,2020-08-01:2606393:Comment:7307002020-08-01T22:00:10.679ZGeorge Burnshttps://zenith.aero/profile/GEORGEWBURNS
<p>The only unreasonable one is the retractable gear. But my question still stands, because this guy did it. It exists. So IS he in danger? Notice his altimeter was I believe reading in the 4000 range. If he headed on up to 8 or 9000, would his plane disintegrate on the first unseen pocket of turbulence? How fragile is that "B" modification? </p>
<p>The only unreasonable one is the retractable gear. But my question still stands, because this guy did it. It exists. So IS he in danger? Notice his altimeter was I believe reading in the 4000 range. If he headed on up to 8 or 9000, would his plane disintegrate on the first unseen pocket of turbulence? How fragile is that "B" modification? </p> The only mod you left off was…tag:zenith.aero,2020-07-31:2606393:Comment:7305342020-07-31T00:54:50.436ZDavid Krakowskyhttps://zenith.aero/profile/DavidKrakowsky
The only mod you left off was a rocket assist!
The only mod you left off was a rocket assist! If you see 160 mph in a 601/6…tag:zenith.aero,2020-07-30:2606393:Comment:7305762020-07-30T23:36:46.826ZJay Carterhttps://zenith.aero/profile/JayMCarter
<p>If you see 160 mph in a 601/650, you have other other problems to worry about.</p>
<p>If you see 160 mph in a 601/650, you have other other problems to worry about.</p> https://www.propellor.com/
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