31 Dec 2025, 16:37 [ UTC - 5; DST ]
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 11:10 |
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Joined: 12/03/14 Posts: 20980 Post Likes: +26458 Company: Ciholas, Inc Location: KEHR
Aircraft: C560V
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Username Protected wrote: However, Alan Klapmeier a long time ago commented on Eclipse and the original Kestrel that the planes were designed around the FAA standard adult. As such, the planes were too small, and could never sell. That's easy to fix, hire really tiny models: Attachment: eclipse-tiny-people-1.png Dang, the plane looks enormous. Not sure if this was photoshopped, or those are really small people. Screen measurements put him at about 5 foot 5 inches. Mike C.
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_________________ Email mikec (at) ciholas.com
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 13:14 |
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Joined: 11/06/10 Posts: 12201 Post Likes: +3086 Company: Looking Location: Outside Boston, or some hotel somewhere
Aircraft: None
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Username Protected wrote: But you're incorrect in the characterization of the IS&S panel architecture as "crap"--for many reasons, that's a false conclusion.
Ken, Maybe crap was a little harsh  I was thinking of a few things. The crash or almost crash caused by throttle quadrants getting stuck by pushing to far. All the custom FADEC teething and related issues. Custom database.... Reality is, Garmin is proprietary in many ways. They just have the market share to be the "standard". As such, Eclipse was considered the odd ball. A lot of the performance items you mentioned could likely have been solved a lot cheaper and helped sales by installing larger engines de-tuned to existing thrust levels. This increases available performance up higher. Tim
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 13:34 |
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Joined: 01/30/08 Posts: 1262 Post Likes: +1166 Location: San Diego CA.
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Username Protected wrote: EA500 was certified under Part 23 amendment 55. I think that means the rule they worked with was FAR 23.53(b) from amendment 50, from 1996:
For normal, utility, and acrobatic category airplanes, the distance required to takeoff and climb to a height of 50 feet above the takeoff surface must be determined for each weight, altitude, and temperature within the operational limits established for takeoff with-- (1) Takeoff power on each engine; (2) Wing flaps in the takeoff position(s); and (3) Landing gear extended.
Definitely says all engines to 50 ft.
Thanks for pointing that out. Now I'm even more impressed with the SII as its numbers are definitely with an engine failure at V1.
Mike C. Mike, The Eclipse is the only jet certified under the same section of part 23 as piston twins under 6000#. At the time of certification Eclipse argued that their airplane was so inexpensive it would be a Baron replacement and therefore should not be held to the same standard as the Baron. I don't believe the Eclipse even meets the climb requirements of the commuter category which is applied to piston twins over 6000#. You won't find charts for balanced field, second segment, accelerate go etc in an Eclipse POH because it was never designed to climb out on a single engine. In terms of engine failures during take-off the Eclipse is no better than a C-310.
_________________ Member 184
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 13:43 |
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Joined: 11/08/12 Posts: 12837 Post Likes: +5277 Location: Jackson, MS (KHKS)
Aircraft: 1961 Cessna 172
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Username Protected wrote: However, Alan Klapmeier a long time ago commented on Eclipse and the original Kestrel that the planes were designed around the FAA standard adult. As such, the planes were too small, and could never sell. That's easy to fix, hire really tiny models: Attachment: eclipse-tiny-people-1.png Dang, the plane looks enormous. Not sure if this was photoshopped, or those are really small people. Screen measurements put him at about 5 foot 5 inches. Mike C.
The taller woman suggests he’s short
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 14:13 |
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Joined: 03/01/11 Posts: 213 Post Likes: +106
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Username Protected wrote: The crash or almost crash caused by throttle quadrants getting stuck by pushing to far. All the custom FADEC teething and related issues. It's a Hispano-Suiza FADEC, very similar to what is used in the Mustang. Considered part of the engine actually. Quote: Custom database....Reality is, Garmin is proprietary in many ways. They just have the market share to be the "standard". As such, Eclipse was considered the odd ball.
I'll buy that, but are you really saying that nobody else should produce an FMS? What about all the Collins stuff, the Universal FMS's in the world, etc etc? I don't see that approach as very practical, and having lived through the "Silver Crown" era, I don't think it's good for aviation, either. Quote: A lot of the performance items you mentioned could likely have been solved a lot cheaper and helped sales by installing larger engines de-tuned to existing thrust levels. That's what they're doing with the 700. The extra weight of the 615 (it's a lot heavier than the 610) is offset by making the fuselage longer, and the extra fuel burn necessitated the wing stub. The 700 has some very nice performance numbers, but it doesn't really interest me since the existing design fits my needs very well, and I don't want to spend the extra money. [BTW, the existing plane is an extraordinary value right now on the secondary market.] Ken
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 14:16 |
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Joined: 03/01/11 Posts: 213 Post Likes: +106
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Username Protected wrote: [The Eclipse] was never designed to climb out on a single engine... In terms of engine failures during take-off the Eclipse is no better than a C-310. Sorry, Jon, that's just incorrect. There is a different standard than the Part 25 climb requirement, but it's not zero climb and it's not the same as a piston twin. If you want, I'll pull out the comparative requirements of the EA50 and the C310; or may Mike will and save me the effort  . Ken
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 14:22 |
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Joined: 02/10/12 Posts: 6712 Post Likes: +8238 Company: Minister of Pith Location: Florida
Aircraft: Piper PA28/140
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Username Protected wrote: However, Alan Klapmeier a long time ago commented on Eclipse and the original Kestrel that the planes were designed around the FAA standard adult. As such, the planes were too small, and could never sell. That's easy to fix, hire really tiny models: Attachment: eclipse-tiny-people-1.png Dang, the plane looks enormous. Not sure if this was photoshopped, or those are really small people. Screen measurements put him at about 5 foot 5 inches. Mike C. Perspective.
_________________ "No comment until the time limit is up."
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 14:29 |
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Joined: 11/03/08 Posts: 17016 Post Likes: +28963 Location: Peachtree City GA / Stoke-On-Trent UK
Aircraft: A33
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Username Protected wrote: The taller woman suggests he’s short or wealthy
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 15:31 |
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Joined: 01/30/08 Posts: 1262 Post Likes: +1166 Location: San Diego CA.
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Username Protected wrote: [The Eclipse] was never designed to climb out on a single engine... In terms of engine failures during take-off the Eclipse is no better than a C-310. Sorry, Jon, that's just incorrect. There is a different standard than the Part 25 climb requirement, but it's not zero climb and it's not the same as a piston twin. If you want, I'll pull out the comparative requirements of the EA50 and the C310; or may Mike will and save me the effort  . Ken
Please do.
I never said part 25.
Please cite the climb standards to which the Eclipse was certified.
_________________ Member 184
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 15:51 |
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Joined: 10/26/16 Posts: 476 Post Likes: +692
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Username Protected wrote: EA500 was certified under Part 23 amendment 55. I think that means the rule they worked with was FAR 23.53(b) from amendment 50, from 1996:
For normal, utility, and acrobatic category airplanes, the distance required to takeoff and climb to a height of 50 feet above the takeoff surface must be determined for each weight, altitude, and temperature within the operational limits established for takeoff with-- (1) Takeoff power on each engine; (2) Wing flaps in the takeoff position(s); and (3) Landing gear extended.
Definitely says all engines to 50 ft.
Thanks for pointing that out. Now I'm even more impressed with the SII as its numbers are definitely with an engine failure at V1.
Mike C. Mike, The Eclipse is the only jet certified under the same section of part 23 as piston twins under 6000#. At the time of certification Eclipse argued that their airplane was so inexpensive it would be a Baron replacement and therefore should not be held to the same standard as the Baron. I don't believe the Eclipse even meets the climb requirements of the commuter category which is applied to piston twins over 6000#. You won't find charts for balanced field, second segment, accelerate go etc in an Eclipse POH because it was never designed to climb out on a single engine. In terms of engine failures during take-off the Eclipse is no better than a C-310.
Not so fast cowboy. Commuter category doesn't have anything to do with piston twins over 6000lb. And you missed the whole 61knots or above stall speed climb requirement even for twins under 6000lb.
But just to humor you, single engine service ceiling is 25,000 and the single engine rate of climb is 989fpm so in terms of engine failure during take-off Eclipse is considerably better than a C310. It will still do 700fpm on one at 5000ft +15C.
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 16:08 |
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Joined: 01/31/09 Posts: 5193 Post Likes: +3038 Location: Northern NJ
Aircraft: SR22;CJ2+;C510
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Username Protected wrote: So, yes, the plane was indeed designed to climb with an engine out. One of the things we had to demonstrate in the simulator in order to pass the type rating was climbing out after engine loss at rotation with conditions set just right (high altitude airport and warm temperature) to generate the minimum allowable climb gradient.
Ken Always educational to see how little climb that is and the importance of maintaining V2.
_________________ Allen
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 17:23 |
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Joined: 12/03/14 Posts: 20980 Post Likes: +26458 Company: Ciholas, Inc Location: KEHR
Aircraft: C560V
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Username Protected wrote: Perspective. If applied, means he is even shorter, since he is ahead of the wing and I used the wingspan as the reference for scale. Mike C.
_________________ Email mikec (at) ciholas.com
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Post subject: Re: Cirrus SF50 Posted: 07 Nov 2017, 18:03 |
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Joined: 12/03/14 Posts: 20980 Post Likes: +26458 Company: Ciholas, Inc Location: KEHR
Aircraft: C560V
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Username Protected wrote: The Eclipse is the only jet certified under the same section of part 23 as piston twins under 6000#. Reference? I looked up the Eclipse TCDS, and nothing in the basis suggests Eclipse got excused from FAR 23.67 requirements in effect per amendment 55. Specifically 23.67(b): (b) For normal, utility, and acrobatic category reciprocating engine-powered airplanes of more than 6,000 pounds maximum weight, and turbine engine-powered airplanes in the normal, utility, and acrobatic category--
(1) The steady gradient of climb at an altitude of 400 feet above the takeoff must be measurably positive with the-- (i) Critical engine inoperative and its propeller in the minimum drag position; (ii) Remaining engine(s) at takeoff power; (iii) Landing gear retracted; (iv) Wing flaps in the takeoff position(s); and (v) Climb speed equal to that achieved at 50 feet in the demonstration of Sec. 23.53.
(2) The steady gradient of climb must not be less than 0.75 percent at an altitude of 1,500 feet above the takeoff surface, or landing surface, as appropriate, with the-- (i) Critical engine inoperative and its propeller in the minimum drag position; (ii) Remaining engine(s) at not more than maximum continuous power; (iii) Landing gear retracted; (iv) Wing flaps retracted; and (v) Climb speed not less than 1.2So the Eclipse has to be positive at 400 MSL flaps down, gear up, and be 0.75 gradient at 1500 MSL cleaned up. Section (a) is piston under 6000 lbs, (c) is commuter category. Quote: At the time of certification Eclipse argued that their airplane was so inexpensive it would be a Baron replacement and therefore should not be held to the same standard as the Baron. Got a reference for this? I've never seen an argument based on the price of the airplane used to chose different rules before. If this did happen, I feel certain it had to do with the weight and not the price. Quote: I don't believe the Eclipse even meets the climb requirements of the commuter category which is applied to piston twins over 6000#. Pistons over 6000 lbs are also 23.67(b), not commuter category. Quote: You won't find charts for balanced field, second segment, accelerate go etc in an Eclipse POH because it was never designed to climb out on a single engine. Maybe you meant "never required to demonstrate". Quote: In terms of engine failures during take-off the Eclipse is no better than a C-310. If a "new" 310 was designed under the same rules, it would be under 23.67(a), not (b) that applies to the Eclipse. If the FAA said Eclipse was under 23.67(a), I'd like to see some reference to that and how it came to be. I see no special conditions, equivalent level of safety, or exemptions on the TCDS that show that. Mike C.
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