Rules of Thumb - Revision history

Stuart: /* Approach */

2016-09-08T19:22:15Z

‎Approach

2016-09-08T18:15:39Z

2014-12-27T00:32:25Z

‎Approach

2014-12-27T00:32:12Z

‎Glide ratio calculation

2014-12-27T00:31:47Z

‎Time ticks

2014-12-27T00:31:27Z

‎Time ticks

2014-12-27T00:30:45Z

‎Time ticks

2014-12-27T00:30:10Z

‎Time ticks

2014-12-27T00:29:51Z

‎En Route

2014-10-12T23:58:08Z

‎Top of Descent calculation

← Older revision		Revision as of 19:22, 8 September 2016
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	===Height above ground vs distance to runway===		===Height above ground vs distance to runway===
	As a glide slope check (or if G/S is not available), multiply nautical miles to go by 300 to give current height above the ground		As a glide slope check (or if G/S is not available), multiply nautical miles to go by 300 to give current height above the ground
		+	==Cross-wind inbound offset calculation using the clock face method==
		+	I think this is the easiest method to remember - once you understand how a clockface is involved!<br />
		+	It can be used for example, en-route for a hold to see how much offset to fly inbound to the beacon. (Outbound is flown 2 to 3 times this value)<br />
		+	The key is to see the 4 quarters of the clock face and match the value to the wind.<br />
		+	So, assuming the wind is going to be coming from anywhere between 0 and 90 degrees off the nose.<br />
		+	If the wind is 15 degrees off the nose, use 1/4 of the crosswind component. (See the trick? 15 is at the 1/4 past on the clock face!)<br />
		+	If the wind is 30 degrees off the nose, use 1/2 of the crosswind component. (30 is at the 1/2 past on the clock face!)<br />
		+	If the wind is 45 degrees off the nose, use 3/4 of the crosswind component. (45 is at the 3/4 past on the clock face!)<br />
		+	If the wind is 60 degrees or more off the nose, use the full crosswind component.<br />

← Older revision		Revision as of 18:15, 8 September 2016
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		+	* [http://www.planeandpilotmag.com/article/top-10-rules-of-thumb/ Rules of thumb - by Plane and Pilot]
	==En Route==		==En Route==
	===Time ticks===		===Time ticks===

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 ==Approach==
 ===Rate of descent down a 3&deg; glideslope===
 Multiply groundspeed by 5 (or add a zero and half it) to give rate of descent
 ===Height above ground vs distance to runway===
 As a glide slope check (or if G/S is not available), multiply nautical miles to go by 300 to give current height above the ground

@@ Line 3: / Line 3: @@
 Groundspeed divided by 10 gives distance in NM travelled in 6 mins. Use half of this for 3 minute ticks.<br />
 e.g. with a groundspeed of 110 kts, the distance flown in 6 minutes will be 11 NM. It will take 3 minutes to fly 5.5 NM.
 ==Descent==

@@ Line 2: / Line 2: @@
 ===Time ticks===
 Groundspeed divided by 10 gives distance in NM travelled in 6 mins. Use half of this for 3 minute ticks.<br />
-e.g. with a groundspeed of 110 kts, the distance flown in 6 minutes will be 11 NM. It will take 3 minutes to fly 4.5 NM.
+e.g. with a groundspeed of 110 kts, the distance flown in 6 minutes will be 11 NM. It will take 3 minutes to fly 5.5 NM.
 ===Glide ratio calculation===

@@ Line 1: / Line 1: @@
 ==En Route==
 ===Time ticks===
-Groundspeed divided by 10 gives distance in NM travelled in 6mins. Use half of this for 3 minute ticks.<br />
+Groundspeed divided by 10 gives distance in NM travelled in 6 mins. Use half of this for 3 minute ticks.<br />
 e.g. with a groundspeed of 110 kts, the distance frown in 6 minutes will be 11 NM. And 4.5 NM in 3 minutes.
 ===Glide ratio calculation===
 Divide groundspeed by vertical speed (in hundreds)<br />

@@ Line 8: / Line 8: @@
 To find when to start down, multiply the height between where you are now and where you have to be (in 1000's of ft) by 3.<br />
 To find out how fast to descend, multiply groundspeed by 5.<br />
-Example. We are at 5000 ft and need to be at 2000 ft crossing a VOR. We are doing 100 kts and the DME says we are currently 12 NM from the VOR,<br />
+Example. We are at 5000 ft and need to be at 2000 ft crossing a VOR. We are doing 100 kts and the DME says we are currently 15 NM from the VOR,<br />
 - 2000 = 3 ==> 3 x 3 = 9 NM<br />
 * 5 = 500 fpm<br />
-So 3 miles from now, we need to start descending at 500 fpm to cross the VOR at 2000 ft.
+So 6 miles from now, we need to start descending at 500 fpm to cross the VOR at 2000 ft.
 ==Approach==