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General control line discussion => Open Forum => Topic started by: Elwyn Aud on February 09, 2021, 10:40:52 AM


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Title: OT One success, hopefully two more to follow
Post by: Elwyn Aud on February 09, 2021, 10:40:52 AM
I see where the UAE Mars probe has successfully entered obit. It won't land but just circle the planet collecting data. The Chinese and American probes will both attempt to land a probe on the surface. A whole lot more difficult. The American lander is supposed to have a helicopter on board. If they  can pull that off it will be amazing.
Title: Re: OT One success, hopefully two more to follow
Post by: Randy Powell on February 09, 2021, 10:44:41 AM
No kidding.
Title: Re: OT One success, hopefully two more to follow
Post by: Bob Hunt on February 09, 2021, 12:06:42 PM
Yeah, but the FAA will probably fine them for violating Amazon's drone delivery air space.

Bob Hunt
 
Title: Re: OT One success, hopefully two more to follow
Post by: Randy Powell on February 09, 2021, 01:42:24 PM
 LL~
Title: Re: OT One success, hopefully two more to follow
Post by: FLOYD CARTER on February 09, 2021, 06:25:17 PM
That Mars probe will probably take lots of pictures.  But none as good as the ones Elwin gets.
Title: Re: OT One success, hopefully two more to follow
Post by: Brett Buck on February 09, 2021, 07:06:33 PM
I see where the UAE Mars probe has successfully entered obit. It won't land but just circle the planet collecting data. The Chinese and American probes will both attempt to land a probe on the surface. A whole lot more difficult. The American lander is supposed to have a helicopter on board. If they  can pull that off it will be amazing.

   Particularly since the atmospheric density is only .6% of sea level earth. Howard can tell you what density altitude that corresponds to.

   Brett

p.s. 112,000 feet. Highest altitude achieved by a manned helicopter = 41,000 feet - only recently have helicopters been able to reach the top of Mt. Everest, at 29000 feet.
Title: Re: OT One success, hopefully two more to follow
Post by: Motorman on February 09, 2021, 07:38:45 PM
Will the probe have to quarantine for 2 weeks? Haven't they already landed on Mars?
Title: Re: OT One success, hopefully two more to follow
Post by: Brian Hampton on February 10, 2021, 06:12:12 PM
Particularly since the atmospheric density is only .6% of sea level earth.
Considering that the NASA scientists aren't particularly dumb, this is how they conducted their experiments. Intriguingly they even took into account Mars' lower gravity.
https://www.nasa.gov/feature/jpl/nasas-mars-helicopter-completes-flight-tests
Title: Re: OT One success, hopefully two more to follow
Post by: Joe Gilbert on February 18, 2021, 08:58:32 PM
How many prop driven airplanes can fly at 116000 thousand feet. I am sure they have it figured out and it will be a great accomplishment.
Title: Perseverance rover
Post by: Brett Buck on February 18, 2021, 11:05:19 PM
3-in-a-row for Mars, this time the Perseverance lander.

    Brett
Title: Re: OT One success, hopefully two more to follow
Post by: Elwyn Aud on February 19, 2021, 01:56:12 AM
The video report of the landing was a bit of a nail-biter considering all the steps involved in getting everything slowed down and then getting the rover safely on the surface. Well done NASA!!!   The Chinese probe will just be orbiting for now with an attempted landing in the future.
Title: Re: OT One success, hopefully two more to follow
Post by: Elwyn Aud on February 19, 2021, 02:07:05 AM
How many prop driven airplanes can fly at 116000 thousand feet. I am sure they have it figured out and it will be a great accomplishment.

Just under 97;000 feet here on Earth. The aircraft is sort of a giant version of an indoor rubber powered endurance flyer.

https://en.wikipedia.org/wiki/AeroVironment_Helios_Prototype
Title: Re: OT One success, hopefully two more to follow
Post by: pmackenzie on February 20, 2021, 06:07:25 PM
Video of some of the test flights. Skip the first minute to see more controlled flight:

https://www.youtube.com/watch?v=nAQxNd3uBN0

Some more detail about the heli:

https://www.youtube.com/watch?v=GhsZUZmJvaM
Title: Re: OT One success, hopefully two more to follow
Post by: Dave Hull on February 20, 2021, 08:34:12 PM
It sounds much like a deHavilland Twin Otter running up over at the airport. Listened to that for years.

Fingers and toes crossed here that they get at least their five discovery/engineering flights in--and maybe an extra!

Dave