Why does Canada require a minimum rate of climb for ultralights of 300 ft/min?Why is the initial short-field climb below Vₓ in a Cessna 172?Does landing in extreme weather conditions require any different or special training?Why is it not a good idea to climb higher than a level at which you would have a cruise weight-climb speed less than 500 ft/min?For calculating $V_stall$, why should be used $C_L,max$ and not $C_L,min$ (that would be more prudent)?Why is the gradient line for climb in a one-engine-inoperative condition during take off under CS-25 described in percentage?How does an increase in climb rate affect climb gradient?How does the FAA define fuel capacity for ultralights?How can I compute the minimum possible bank angle for a turn with a given radius?Commercial aircraft minimum and maximum climb angle and rate?
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Why does Canada require a minimum rate of climb for ultralights of 300 ft/min?
Why is the initial short-field climb below Vₓ in a Cessna 172?Does landing in extreme weather conditions require any different or special training?Why is it not a good idea to climb higher than a level at which you would have a cruise weight-climb speed less than 500 ft/min?For calculating $V_stall$, why should be used $C_L,max$ and not $C_L,min$ (that would be more prudent)?Why is the gradient line for climb in a one-engine-inoperative condition during take off under CS-25 described in percentage?How does an increase in climb rate affect climb gradient?How does the FAA define fuel capacity for ultralights?How can I compute the minimum possible bank angle for a turn with a given radius?Commercial aircraft minimum and maximum climb angle and rate?
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$begingroup$
What is a safe minimum rate of climb for ultralights? I understand most ultralights climb at least 300-800 ft/min and in fact the Canadian ultralight specs call for a minimum rate of climb of 300 ft/min. Even the Lazair's specs note a rate of climb of 400 ft/min.
Why does Canada require 300 ft/min specifically? Why not 120 ft/min? 60 ft/min? Even at 60 ft/min, you could clear a 4' fence in 4 seconds. Of course you would want some clearance, so say 20 seconds. Seems pretty good in my book. Need to clear 50' trees? Just kite around in a circle.
safety aircraft-performance ultralight transport-canada
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
$endgroup$
add a comment
|
$begingroup$
What is a safe minimum rate of climb for ultralights? I understand most ultralights climb at least 300-800 ft/min and in fact the Canadian ultralight specs call for a minimum rate of climb of 300 ft/min. Even the Lazair's specs note a rate of climb of 400 ft/min.
Why does Canada require 300 ft/min specifically? Why not 120 ft/min? 60 ft/min? Even at 60 ft/min, you could clear a 4' fence in 4 seconds. Of course you would want some clearance, so say 20 seconds. Seems pretty good in my book. Need to clear 50' trees? Just kite around in a circle.
safety aircraft-performance ultralight transport-canada
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
$endgroup$
3
$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
2
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
2
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
2
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago
add a comment
|
$begingroup$
What is a safe minimum rate of climb for ultralights? I understand most ultralights climb at least 300-800 ft/min and in fact the Canadian ultralight specs call for a minimum rate of climb of 300 ft/min. Even the Lazair's specs note a rate of climb of 400 ft/min.
Why does Canada require 300 ft/min specifically? Why not 120 ft/min? 60 ft/min? Even at 60 ft/min, you could clear a 4' fence in 4 seconds. Of course you would want some clearance, so say 20 seconds. Seems pretty good in my book. Need to clear 50' trees? Just kite around in a circle.
safety aircraft-performance ultralight transport-canada
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
$endgroup$
What is a safe minimum rate of climb for ultralights? I understand most ultralights climb at least 300-800 ft/min and in fact the Canadian ultralight specs call for a minimum rate of climb of 300 ft/min. Even the Lazair's specs note a rate of climb of 400 ft/min.
Why does Canada require 300 ft/min specifically? Why not 120 ft/min? 60 ft/min? Even at 60 ft/min, you could clear a 4' fence in 4 seconds. Of course you would want some clearance, so say 20 seconds. Seems pretty good in my book. Need to clear 50' trees? Just kite around in a circle.
safety aircraft-performance ultralight transport-canada
safety aircraft-performance ultralight transport-canada
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
edited 1 hour ago
Pondlife
54.3k12 gold badges153 silver badges317 bronze badges
54.3k12 gold badges153 silver badges317 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
asked 9 hours ago
FredFred
5081 silver badge8 bronze badges
5081 silver badge8 bronze badges
3
$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
2
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
2
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
2
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago
add a comment
|
3
$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
2
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
2
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
2
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago
3
3
$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
2
2
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
2
2
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
2
2
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago
add a comment
|
1 Answer
1
active
oldest
votes
$begingroup$
When you fly gliders you discover it's quite common to run into air that's descending at 1-200 fpm, or "sink" in soaring-talk. Descending air next to a thermal, or air descending due to downsloping terrain. It's a lot more than that at times, but a couple hundred fpm is typical.
On a day where there's any convection (with rising air, there is always equivalent descending air adjacent to it) you are in sink quite a lot. A 300 fpm ROC provides a reasonable assurance that you will be still able to climb while in most (but certainly not all) conditions of descending air, barely.
If you have an ultralight that can only climb 100 fpm, this might be fine on a smooth day with stable air, if you're patient. If there is any vertical motion in the air however, you have a problem. The minimum climb rate requirement is an attempt by the regulator to ensure that that average ultralight buyer will have a machine that won't kill him because it couldn't even out-climb a bit of subsiding air at the end of the runway.
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
$endgroup$
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
add a comment
|
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1 Answer
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oldest
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active
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$begingroup$
When you fly gliders you discover it's quite common to run into air that's descending at 1-200 fpm, or "sink" in soaring-talk. Descending air next to a thermal, or air descending due to downsloping terrain. It's a lot more than that at times, but a couple hundred fpm is typical.
On a day where there's any convection (with rising air, there is always equivalent descending air adjacent to it) you are in sink quite a lot. A 300 fpm ROC provides a reasonable assurance that you will be still able to climb while in most (but certainly not all) conditions of descending air, barely.
If you have an ultralight that can only climb 100 fpm, this might be fine on a smooth day with stable air, if you're patient. If there is any vertical motion in the air however, you have a problem. The minimum climb rate requirement is an attempt by the regulator to ensure that that average ultralight buyer will have a machine that won't kill him because it couldn't even out-climb a bit of subsiding air at the end of the runway.
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
$endgroup$
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
add a comment
|
$begingroup$
When you fly gliders you discover it's quite common to run into air that's descending at 1-200 fpm, or "sink" in soaring-talk. Descending air next to a thermal, or air descending due to downsloping terrain. It's a lot more than that at times, but a couple hundred fpm is typical.
On a day where there's any convection (with rising air, there is always equivalent descending air adjacent to it) you are in sink quite a lot. A 300 fpm ROC provides a reasonable assurance that you will be still able to climb while in most (but certainly not all) conditions of descending air, barely.
If you have an ultralight that can only climb 100 fpm, this might be fine on a smooth day with stable air, if you're patient. If there is any vertical motion in the air however, you have a problem. The minimum climb rate requirement is an attempt by the regulator to ensure that that average ultralight buyer will have a machine that won't kill him because it couldn't even out-climb a bit of subsiding air at the end of the runway.
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
$endgroup$
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
add a comment
|
$begingroup$
When you fly gliders you discover it's quite common to run into air that's descending at 1-200 fpm, or "sink" in soaring-talk. Descending air next to a thermal, or air descending due to downsloping terrain. It's a lot more than that at times, but a couple hundred fpm is typical.
On a day where there's any convection (with rising air, there is always equivalent descending air adjacent to it) you are in sink quite a lot. A 300 fpm ROC provides a reasonable assurance that you will be still able to climb while in most (but certainly not all) conditions of descending air, barely.
If you have an ultralight that can only climb 100 fpm, this might be fine on a smooth day with stable air, if you're patient. If there is any vertical motion in the air however, you have a problem. The minimum climb rate requirement is an attempt by the regulator to ensure that that average ultralight buyer will have a machine that won't kill him because it couldn't even out-climb a bit of subsiding air at the end of the runway.
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
$endgroup$
When you fly gliders you discover it's quite common to run into air that's descending at 1-200 fpm, or "sink" in soaring-talk. Descending air next to a thermal, or air descending due to downsloping terrain. It's a lot more than that at times, but a couple hundred fpm is typical.
On a day where there's any convection (with rising air, there is always equivalent descending air adjacent to it) you are in sink quite a lot. A 300 fpm ROC provides a reasonable assurance that you will be still able to climb while in most (but certainly not all) conditions of descending air, barely.
If you have an ultralight that can only climb 100 fpm, this might be fine on a smooth day with stable air, if you're patient. If there is any vertical motion in the air however, you have a problem. The minimum climb rate requirement is an attempt by the regulator to ensure that that average ultralight buyer will have a machine that won't kill him because it couldn't even out-climb a bit of subsiding air at the end of the runway.
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
answered 6 hours ago
John KJohn K
41.2k1 gold badge74 silver badges141 bronze badges
41.2k1 gold badge74 silver badges141 bronze badges
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
add a comment
|
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
2
2
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
$begingroup$
Upvote but I think 100-200 fpm is an understatement. In my experience localized 500 fpm sink is extremely common - would expect to see that at some point on most flights - and I've run into 1500+ fpm several times.
$endgroup$
– pericynthion
3 hours ago
1
1
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
$begingroup$
Well yes but you generally don't fly ultralights on those sorts of days with the low mass and low wing loading. It's quite unpleasant. I'm talking about the mild thermic or subsidence conditions that someone flying an ultralight in the morning or evening, or a quiet day, might encounter.
$endgroup$
– John K
3 hours ago
add a comment
|
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$begingroup$
IANAP, but circling at the end of the runway just to gain enough altitude to clear a tree sounds A) really dangerous, and B) really annoying for the pilot behind you waiting to take off.
$endgroup$
– FreeMan
9 hours ago
2
$begingroup$
That assumes you're taking off from an airport, and not your own "back 40". lol It also depends what speed you are flying at. If Lazair's stall speed is 18mph, and Vc is 1.3Vs, that makes it's minimum cruise speed about 24mph.
$endgroup$
– Fred
9 hours ago
2
$begingroup$
"Ultralights" is a very, very broad category when it comes to performance. What really bothers me is, why on earth would you want to climb as slow as possible? As quickly as possible might not be safe either, but there is a good reason why Vx and Vy are established and used!
$endgroup$
– Jpe61
8 hours ago
2
$begingroup$
@FreeMan Most airports wouldn't allow you to kite around to gain altitude as you would most likely be skimming the tops of the hangers....
$endgroup$
– Fred
8 hours ago