18 May 2025, 05:43 [ UTC - 5; DST ]
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Post subject: Re: Aerostar Jet coming to OSH Posted: 16 Jul 2011, 22:44 |
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Joined: 01/29/09 Posts: 1770 Post Likes: +533 Location: KCRS
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Tom,
Very attractive aircraft. It's the first time I have seen one.
Do the engine mountings create any special FOD issues.
Chris
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Post subject: Re: Aerostar Jet coming to OSH Posted: 16 Jul 2011, 23:16 |
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Joined: 01/01/11 Posts: 964 Post Likes: +599 Company: Well, it's UA now Location: Houston, TX
Aircraft: B-787 & C55
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No TRs, no spoilers, you will need to change the brakes every other landing or just shut down an engine at touchdown to keep from going off the end of anything less than 5K feet.
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Post subject: Re: Aerostar Jet coming to OSH Posted: 17 Jul 2011, 10:33 |
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Joined: 02/14/08 Posts: 3133 Post Likes: +2672 Location: KGBR
Aircraft: D50
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Best looking small jet to my eye.
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Post subject: Re: Aerostar Jet coming to OSH Posted: 17 Jul 2011, 14:03 |
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Joined: 12/09/07 Posts: 17125 Post Likes: +13104 Location: Cascade, ID (U70)
Aircraft: C182
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Username Protected wrote: Tom, send a direct link to Stan. He'll wet his pants and slobber down his shirt front! He may have sold his Aerostar. If so, that means he's shopping!
_________________ "Great photo! You must have a really good camera."
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Post subject: Re: Aerostar Jet coming to OSH Posted: 17 Jul 2011, 23:27 |
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Joined: 11/22/08 Posts: 3078 Post Likes: +1048 Company: USAF Propulsion Laboratory Location: Dayton, OH
Aircraft: PA24, AEST 680, 421
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Username Protected wrote: No TRs, no spoilers, you will need to change the brakes every other landing or just shut down an engine at touchdown to keep from going off the end of anything less than 5K feet. Where did you get that information?
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Post subject: Re: Aerostar Jet coming to OSH Posted: 18 Jul 2011, 00:14 |
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Joined: 11/01/08 Posts: 2687 Post Likes: +717
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Username Protected wrote: No TRs, no spoilers, you will need to change the brakes every other landing or just shut down an engine at touchdown to keep from going off the end of anything less than 5K feet. Drag chute! It did look like that thing was zippin' along pretty good at touchdown. Wouldn't be pretty on a slick runway or with a tailwind component.
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Post subject: Re: Aerostar Jet coming to OSH Posted: 18 Jul 2011, 16:50 |
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Joined: 11/22/08 Posts: 3078 Post Likes: +1048 Company: USAF Propulsion Laboratory Location: Dayton, OH
Aircraft: PA24, AEST 680, 421
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Depending on the weight, approach speed for the Aerostar with recip engines is about 90-98 kts. Landing distance over 50' obstacle at ISA conditions, no wind, max gross wt ranges from 2150 sea level to 2800 at 10k ft. Full flaps, stall touchdown. My guess is most carry a little extra speed, but I doubt anyone would need 5000'.
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Post subject: Re: Aerostar Jet coming to OSH Posted: 18 Jul 2011, 19:27 |
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Joined: 01/01/11 Posts: 964 Post Likes: +599 Company: Well, it's UA now Location: Houston, TX
Aircraft: B-787 & C55
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Username Protected wrote: No TRs, no spoilers, you will need to change the brakes every other landing or just shut down an engine at touchdown to keep from going off the end of anything less than 5K feet. Depending on the weight, approach speed for the Aerostar with recip engines is about 90-98 kts. Landing distance over 50' obstacle at ISA conditions, no wind, max gross wt ranges from 2150 sea level to 2800 at 10k ft. Full flaps, stall touchdown. My guess is most carry a little extra speed, but I doubt anyone would need 5000'. Where did you get that information?
Hi Fred, Just an educated guess from years of flying jet equipment? I will be happy to eat crow if I am wrong as the Aerostar line and anything Ted Smith designed has been a favorite of mine since I was flipping through the pages of my Dad's issues of "Flying" magazine. However, in watching the video provided there did not appear to be any TRs on the engine cowling and after touchdown there was no engine spool up to indicate TR deployment. I did not see any spoilers deployed after landing either. Landing flaps seemed to be the same setting as takeoff flaps. Since there is no prop to energize the air flow over the wing I would expect the landing speed to be bumped up a little over the piston version as well as to help with spool up time (depending on how much electronic help the engines have)
The biggest reason I made my comment about brakes and roll out is the residual/idle thrust of a jet/turbine engine. I would expect that the FJ-100 would have at least 1000# per side to equal/better the thrust available from the prop version and probably more to insure adequate performance at altitude since a turbine/jet engine is normally aspirated and has the associated power loss with altitude. At idle with a jet you are still getting a healthy push. (Looking at your company info I expect you know this and some of this is for other readers that may not have turbine/jet/turbofan experience. Not trying to talk down to anyone.) With the 737-500/700 series there are many time that you don't need to add power to taxi away, just release the brakes and wait a second or two and it will move on idle power alone then you will need to keep taxi speed in check with brake application.
The FJ-100 with single disc, no anti skid, no props going flat with power reduction at touch down, no spoilers to put weight on wheels, no TRs to help reduce the idle thrust and kill off the first 20-30 kts or so of speed will have to have a longer roll out than the prop version of the Aerostar, no doubt about it. Is it a bad thing, not really, if you have a long enough runway, don't over heat the brakes or flat spot/blow out a tire.
Bob
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