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Post by oldpropfan on Jan 26, 2009 3:57:02 GMT -5
Should I be using my average speed for the test flight as my target ground speed or airspeed. The reason I ask is I flew the test flight a little slow but not too much: and now in the regular flights I'm flying faster than expected. I'm using regular cruise settings for the DC-3 giving me around 140 kts indicated. I just finished leg 2 and was 6 minutes faster than target, that was with IAS of 138-139 and a 2000lb overload of relief supplies (those cans of malt beverage sure add weight fast). Don't want to get too focused on target times as I want to keep this fun but being a little closer would be nice, without having to do an extra lap around the field ;D On to Dilli I go. Anybody have any extra ice before I leave? Have to keep the pilot refreshments cool  Al |
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Dave Evans bgak015
Member
"there are old pilots and there are bold pilots but there are few old and bold pilots"
Posts: 57
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Post by Dave Evans bgak015 on Jan 26, 2009 5:04:16 GMT -5
you are doing good ,wait till after Dilli, they have some winds that will have you bending throttles an flying sideways( maybe normal for OZ pilots but this YANK is more comfortable looking out the front )
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Post by woodhick803 on Jan 26, 2009 7:40:52 GMT -5
You can fly the route at whatever speed you desire (subject to aircraft limitations), but need to arrive over your destination in time to set up for landing as close as possible to your target time (your minute) for each leg. You need to remember that you may be facing strong head winds and conditions that may make it necessary to divert from the most direct flight route. The slow speed you maintained for the timed course allows you to have a "time reserve" built into each flight leg. You may find it necessary to loiter near your destination in order to land as close as possible to your minute.
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Post by Andrew Godden on Jan 26, 2009 17:39:48 GMT -5
Should I be using my average speed for the test flight as my target ground speed or airspeed. The reason I ask is I flew the test flight a little slow but not too much: and now in the regular flights I'm flying faster than expected. I'm using regular cruise settings for the DC-3 giving me around 140 kts indicated. I just finished leg 2 and was 6 minutes faster than target, that was with IAS of 138-139 and a 2000lb overload of relief supplies (those cans of malt beverage sure add weight fast). Don't want to get too focused on target times as I want to keep this fun but being a little closer would be nice, without having to do an extra lap around the field ;D On to Dilli I go. Anybody have any extra ice before I leave? Have to keep the pilot refreshments cool Al Al, The Test Flight average speed is ground speed at 4500 ft. In order to meet your Target Times on the Legs, you will need to fly faster than the Test Flight average speed, in order to compensate for take-off, climb to cruise, different ground speed depending on altitude, weather factors and the circuit and approach at destination. If you don't have an E6-B calculator, a normal calculator for checking time progress at different stages en route is a good technique. You can then adjust speed and hopefully not have to loiter too long or fly an extended circuit. There are some posts under other threads which discuss this in some more detail. |
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Post by wulf on Feb 2, 2009 11:36:31 GMT -5
Hallo,
dont know who is responsible for this question.
During calculation my Leg 1 ive found the following from the testflight:
GAAR 007 Cessna Model 182 'Skylane' GVA001 33.12 96.49
GAAR 151 Cessna Model 182 'Skylane' Germany 32.00 96.17
My faster flight time gives me a slower average speed?
Regards
Wulf
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Post by Chris Ross on Feb 2, 2009 15:09:51 GMT -5
It is an FS9 FSX problem
I do not have this years formula si I can not answer the question
Interesting point though surprised I had not noticed it myself
Regards
Chris
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Post by wulf on Feb 2, 2009 16:34:31 GMT -5
Hi Chris,
sorry but it has nothing to do with FS9/FSX.
The calculation of the average speed in the Excelsheet is wrong and I hope someone will correct it.
Regards
Wulf
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Post by Andrew Godden on Feb 2, 2009 17:05:32 GMT -5
Wulf,
In fact, this is an FS9 / FSX issue and it relates to the time variance problem in FS9. GAAR 007 is using FSX and you are using FS9. Without going into a deep explanation, simply, one minute of real time equals one minute of virtual time in FSX, however, it does not equal one minute of virtual time in FS9. This was discovered in a previous GAAR event and the Excel spreadsheet used to calculate Target Times takes this into account.
Consequently, the calculated Target Times for your aircraft using FS9 based on your Test Flight Time are correct. You only have to fly to your Target Time and your performance in the event is only compared to that Target Time and no other participant.
I hope this explains what appears to be an error but in reality is not.
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Post by wulf on Feb 3, 2009 9:26:04 GMT -5
Hallo Chris and Andrew,
thanks for the quick answer.
Regards
Wulf
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Post by woodhick803 on Feb 3, 2009 10:08:10 GMT -5
Interesting that FSX and FS-9 disagree as to what constitutes a "minute". I thought that question had long ago been settled by the (U.S.) Bureau of Standards through the use of such things as atomic clocks and the decay rate of Cesium atoms. Are we now to draw the conclusion that a minute ain't a minute unless Bill G. says it's a minute?
Dan George--aka GAAR 007
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Post by tricky on Feb 4, 2009 2:11:11 GMT -5
"Target Times"? Immaterial. Just need to make the ol' girl purrs along at 31" and I'm sober enough to tell the difference between runways & taxiways when I eventually arrive!
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