Contra-rotating helicopter now based on Mars
Wasn't one of the surprising things learnt about Mars is the wind and dust is very light.
I seem to recall previous rovers were expected to have a limited life span due to dust build up on the solar panels but this never happened. Which is why the older rovers are still going, or at least went for a lot longer than expected.
I seem to recall previous rovers were expected to have a limited life span due to dust build up on the solar panels but this never happened. Which is why the older rovers are still going, or at least went for a lot longer than expected.
Join Date: Sep 2000
Location: states
Age: 68
Posts: 160
Likes: 0
Received 0 Likes
on
0 Posts
Join Date: Feb 2006
Location: Hanging off the end of a thread
Posts: 32,868
Received 2,816 Likes
on
1,200 Posts
According to the video filmed at NASA and linked in post #27 it has solar cells and a rechargeable battery. The solar cells are in the small panel above the blades. A one day charge fully charges the battery and allows a 90 second (I think it was) flight.
I don't think Atomic batteries are used very often because of the concern of the results of them falling back to Earth in the event of some failure.
I don't think Atomic batteries are used very often because of the concern of the results of them falling back to Earth in the event of some failure.
According to the video filmed at NASA and linked in post #27 it has solar cells and a rechargeable battery. The solar cells are in the small panel above the blades. A one day charge fully charges the battery and allows a 90 second (I think it was) flight.
I don't think Atomic batteries are used very often because of the concern of the results of them falling back to Earth in the event of some failure.
I don't think Atomic batteries are used very often because of the concern of the results of them falling back to Earth in the event of some failure.
skadi
And of course the Perseverance rover is powered by heat from Plutonium radioactive decay; I wonder how long it will operate?
Mars helicopter
I can only begin to imagine the work and engineering that went into building the helicopter drone they are about to fly on Mars and although we have many problems to solve here, on the only planet we are likley to inhabit for a long while or even ever, I believe the money is well spent for reasons most on this forum would not doubt.
However, I read something that stuck in my craw today about one of the little " easter eggs" they packed away on the the little Mars ship. A postage stamp sized piece of original fabric from the Wright flier is abord the rotorcraft. I do appreciate the sentiment and the fact that they made the gesture, even as wrong headed as I find it. Many of you have seen the quote below so forgive me for that. The Wrights brothers were not fans of the helicopter ever being practical beyond the childs toy that consists of a one piece set of blades glued to a stick that gets spun up between your palms and makes short hops across the room, until Mom points out that " you're gonna put someone's eye out with that thing, take it outside!". One of those things was apparently early inspiration for them to start the whole thing about flying around, so there is a connection to helicopters albeit a weak one. "Like all novices we began with the helicopter in childhood, but soon saw that the helicopter had no future, and dropped it. The helicopter does with great labor only what the balloon does without labor, and is no more fitted than the balloon for rapid horizontal flight. If its engine stops, it must fall with deathly violence, for it can neither glide like the aeroplane or float like the balloon. The helicopter is much easier to design than the aeroplane, but is worthless when done.
Wilbur Wright, letter written in 1907. Quoted in the 1954 book ."
Clearly they were not future casters in the vein of Leonardo, Jules Vern, or hey.....how about Sikorsky or Juan de la Cierva. Maybe there are no people at JPL who know who Arthur Young, Frank Piasecki, or Stanley Hiller are. How cool would it have been to put a piece of the fabric from the VS 300 on the Mars helicopter?
I know this is a bit like the folks who go to movies ( remember doing that?)and point out all the errors in something because they happen to know more than your average Joe about it. It's a small thing but generating lift with a rotary wing is a lot different from a fixed wing. Sikorsky designed both types with admirable results, The Wrights scoffed at one and barely flew the other before many others joined them. They were brilliant about some thngs and it paid off when they were persistant but how about credit where it is due?
Hmmmmm. I'm adding an after thought here. Perhaps it is splendid irony that the fabric patch was placed on board. A slight poke in the eye to Wilbur for his disregard of the helicopter.
However, I read something that stuck in my craw today about one of the little " easter eggs" they packed away on the the little Mars ship. A postage stamp sized piece of original fabric from the Wright flier is abord the rotorcraft. I do appreciate the sentiment and the fact that they made the gesture, even as wrong headed as I find it. Many of you have seen the quote below so forgive me for that. The Wrights brothers were not fans of the helicopter ever being practical beyond the childs toy that consists of a one piece set of blades glued to a stick that gets spun up between your palms and makes short hops across the room, until Mom points out that " you're gonna put someone's eye out with that thing, take it outside!". One of those things was apparently early inspiration for them to start the whole thing about flying around, so there is a connection to helicopters albeit a weak one. "Like all novices we began with the helicopter in childhood, but soon saw that the helicopter had no future, and dropped it. The helicopter does with great labor only what the balloon does without labor, and is no more fitted than the balloon for rapid horizontal flight. If its engine stops, it must fall with deathly violence, for it can neither glide like the aeroplane or float like the balloon. The helicopter is much easier to design than the aeroplane, but is worthless when done.
Wilbur Wright, letter written in 1907. Quoted in the 1954 book ."
Clearly they were not future casters in the vein of Leonardo, Jules Vern, or hey.....how about Sikorsky or Juan de la Cierva. Maybe there are no people at JPL who know who Arthur Young, Frank Piasecki, or Stanley Hiller are. How cool would it have been to put a piece of the fabric from the VS 300 on the Mars helicopter?
I know this is a bit like the folks who go to movies ( remember doing that?)and point out all the errors in something because they happen to know more than your average Joe about it. It's a small thing but generating lift with a rotary wing is a lot different from a fixed wing. Sikorsky designed both types with admirable results, The Wrights scoffed at one and barely flew the other before many others joined them. They were brilliant about some thngs and it paid off when they were persistant but how about credit where it is due?
Hmmmmm. I'm adding an after thought here. Perhaps it is splendid irony that the fabric patch was placed on board. A slight poke in the eye to Wilbur for his disregard of the helicopter.
Ecce Homo! Loquitur...
https://phys.org/news/2021-04-nasa-m...ht-sunday.html
NASA's Mars Helicopter to make first flight attempt Sunday
NASA's Ingenuity Mars Helicopter is two days away from making humanity's first attempt at powered, controlled flight of an aircraft on another planet. If all proceeds as planned, the 4-pound (1.8-kg) rotorcraft is expected to take off from Mars' Jezero Crater Sunday, April 11, at 12:30 p.m. local Mars solar time (10:54 p.m. EDT), hovering 10 feet (3 meters) above the surface for up to 30 seconds. Mission control specialists at NASA's Jet Propulsion Laboratory in Southern California expect to receive the first data from the first flight attempt the following morning at around 4:15 a.m. EDT......
[At] 10:53 p.m. EDT, Ingenuity will begin undergoing its myriad preflight checks. The helicopter will repeat the blade-wiggle test it performed three sols prior. If the algorithms running the guidance, navigation, and control systems deem the test results acceptable, they will turn on the inertial measurement unit (an electronic device that measures a vehicle's orientation and rotation) and inclinometer (which measures slopes). If everything checks out, the helicopter will again adjust the pitch of its rotor blades, configuring them so they don't produce lift during the early portion of the spin-up.
The spin-up of the rotor blades will take about 12 seconds to go from 0 to 2,537 rpm, the optimal speed for the first flight. After a final systems check, the pitch of the rotor blades will be commanded to change yet again—this time so they can dig into those few molecules of carbon dioxide, nitrogen, and argon available in the atmosphere near the Martian surface. Moments later, the first experimental flight test on another planet will begin.
"It should take us about six seconds to climb to our maximum height for this first flight," said JPL's Håvard Grip, the flight control lead for Ingenuity. "When we hit 10 feet, Ingenuity will go into a hover that should last—if all goes well—for about 30 seconds."
While hovering, the helicopter's navigation camera and laser altimeter will feed information into the navigation computer to ensure Ingenuity remains not only level, but in the middle of its 33-by-33-foot (10-by-10-meter) airfield—a patch of Martian real estate chosen for its flatness and lack of obstructions. Then, the Mars Helicopter will descend and touch back down on the surface of Jezero Crater, sending data back to Earth, via Perseverance, to confirm the flight.
Perseverance is expected to obtain imagery of the flight using its Navcam and Mastcam-Z imagers, with the pictures expected to come down that evening (early morning Monday, April 12, in Southern California). The helicopter will also document the flight from its perspective, with a color image and several lower-resolution black-and-white navigation pictures possibly being available by the next morning......
NASA TV will air live coverage of the team as they receive the data, with commentary beginning at 3:30 a.m. EDT.
NASA's Mars Helicopter to make first flight attempt Sunday
NASA's Ingenuity Mars Helicopter is two days away from making humanity's first attempt at powered, controlled flight of an aircraft on another planet. If all proceeds as planned, the 4-pound (1.8-kg) rotorcraft is expected to take off from Mars' Jezero Crater Sunday, April 11, at 12:30 p.m. local Mars solar time (10:54 p.m. EDT), hovering 10 feet (3 meters) above the surface for up to 30 seconds. Mission control specialists at NASA's Jet Propulsion Laboratory in Southern California expect to receive the first data from the first flight attempt the following morning at around 4:15 a.m. EDT......
[At] 10:53 p.m. EDT, Ingenuity will begin undergoing its myriad preflight checks. The helicopter will repeat the blade-wiggle test it performed three sols prior. If the algorithms running the guidance, navigation, and control systems deem the test results acceptable, they will turn on the inertial measurement unit (an electronic device that measures a vehicle's orientation and rotation) and inclinometer (which measures slopes). If everything checks out, the helicopter will again adjust the pitch of its rotor blades, configuring them so they don't produce lift during the early portion of the spin-up.
The spin-up of the rotor blades will take about 12 seconds to go from 0 to 2,537 rpm, the optimal speed for the first flight. After a final systems check, the pitch of the rotor blades will be commanded to change yet again—this time so they can dig into those few molecules of carbon dioxide, nitrogen, and argon available in the atmosphere near the Martian surface. Moments later, the first experimental flight test on another planet will begin.
"It should take us about six seconds to climb to our maximum height for this first flight," said JPL's Håvard Grip, the flight control lead for Ingenuity. "When we hit 10 feet, Ingenuity will go into a hover that should last—if all goes well—for about 30 seconds."
While hovering, the helicopter's navigation camera and laser altimeter will feed information into the navigation computer to ensure Ingenuity remains not only level, but in the middle of its 33-by-33-foot (10-by-10-meter) airfield—a patch of Martian real estate chosen for its flatness and lack of obstructions. Then, the Mars Helicopter will descend and touch back down on the surface of Jezero Crater, sending data back to Earth, via Perseverance, to confirm the flight.
Perseverance is expected to obtain imagery of the flight using its Navcam and Mastcam-Z imagers, with the pictures expected to come down that evening (early morning Monday, April 12, in Southern California). The helicopter will also document the flight from its perspective, with a color image and several lower-resolution black-and-white navigation pictures possibly being available by the next morning......
NASA TV will air live coverage of the team as they receive the data, with commentary beginning at 3:30 a.m. EDT.
Ecce Homo! Loquitur...
https://mars.nasa.gov/technology/hel...than-april-14/
Mars Helicopter Flight Delayed to No Earlier than April 14
Based on data from the Ingenuity Mars helicopter that arrived late Friday night, NASA has chosen to reschedule the Ingenuity Mars Helicopter’s first experimental flight to no earlier than April 14.
During a high-speed spin test of the rotors on Friday, the command sequence controlling the test ended early due to a “watchdog” timer expiration. This occurred as it was trying to transition the flight computer from ‘Pre-Flight’ to ‘Flight’ mode.
The helicopter is safe and healthy and communicated its full telemetry set to Earth.
The watchdog timer oversees the command sequence and alerts the system to any potential issues. It helps the system stay safe by not proceeding if an issue is observed and worked as planned.
The helicopter team is reviewing telemetry to diagnose and understand the issue. Following that, they will reschedule the full-speed test.
Mars Helicopter Flight Delayed to No Earlier than April 14
Based on data from the Ingenuity Mars helicopter that arrived late Friday night, NASA has chosen to reschedule the Ingenuity Mars Helicopter’s first experimental flight to no earlier than April 14.
During a high-speed spin test of the rotors on Friday, the command sequence controlling the test ended early due to a “watchdog” timer expiration. This occurred as it was trying to transition the flight computer from ‘Pre-Flight’ to ‘Flight’ mode.
The helicopter is safe and healthy and communicated its full telemetry set to Earth.
The watchdog timer oversees the command sequence and alerts the system to any potential issues. It helps the system stay safe by not proceeding if an issue is observed and worked as planned.
The helicopter team is reviewing telemetry to diagnose and understand the issue. Following that, they will reschedule the full-speed test.
Ecce Homo! Loquitur...
https://spaceflightnow.com/2021/04/1...-first-flight/
Mars helicopter needs a software update before attempting first flight
NASA said Monday the Ingenuity helicopter needs a software update to resolve a problem that cut short the drone’s rotor startup sequence on Mars last week, postponing the craft’s first flight in the Red Planet’s atmosphere until later this month.
The helicopter — set to try to become the first craft to perform powered flight in the atmosphere of another planet — aborted an attempted spin-up of the its counter-rotating blades Friday after its autonomous control software detected a problem.
The lightweight helicopter was programmed to power up its rotors to flight speed near 2,500 rpm for a final pre-flight checkout Friday, leading to an attempt at a first flight Sunday, April 11. But the premature end to the high-speed spin test prompted ground teams to delay Ingenuity’s first test flight to no earlier than Wednesday, April 14.
In an update released late Monday by NASA’s Jet Propulsion Laboratory, mission managers said engineers identified a software fix for the “command sequence issue” that ended the high-speed spin-up test Friday.
Officials at JPL, which manages the Ingenuity helicopter project, did not announce a new target date for the rotorcraft’s first test flight. Ground teams hope to determine a new target date next week for the helicopter’s first flight.....
Mars helicopter needs a software update before attempting first flight
NASA said Monday the Ingenuity helicopter needs a software update to resolve a problem that cut short the drone’s rotor startup sequence on Mars last week, postponing the craft’s first flight in the Red Planet’s atmosphere until later this month.
The helicopter — set to try to become the first craft to perform powered flight in the atmosphere of another planet — aborted an attempted spin-up of the its counter-rotating blades Friday after its autonomous control software detected a problem.
The lightweight helicopter was programmed to power up its rotors to flight speed near 2,500 rpm for a final pre-flight checkout Friday, leading to an attempt at a first flight Sunday, April 11. But the premature end to the high-speed spin test prompted ground teams to delay Ingenuity’s first test flight to no earlier than Wednesday, April 14.
In an update released late Monday by NASA’s Jet Propulsion Laboratory, mission managers said engineers identified a software fix for the “command sequence issue” that ended the high-speed spin-up test Friday.
Officials at JPL, which manages the Ingenuity helicopter project, did not announce a new target date for the rotorcraft’s first test flight. Ground teams hope to determine a new target date next week for the helicopter’s first flight.....
Did they try turning it off and turning it back on again?