stunthanger.com
Speed,Combat,Scale,Racing => Carrier => Topic started by: Douglas Ames on October 07, 2011, 11:10:01 PM
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What is the calculated time to hit the max. 70 mph speed on spec. lines (Denver rules)? My math is really rusty tonight.
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If you can do 70+ mph on high speed, go for it. You only get scored for doing 70 mph. The low speed and landing will get the points. I noticed in the last and only carrier contest I flew this year. If I had gotten my usual landing I would have been 2nd instead of 5th. LL~ LL~
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To answer your math question - the time works out to 25.70 sec for 8 laps.
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Douglas
The Carrier high speed run is for a nomial 1/2 mile distance. The constant is 1799.28. If you divide that by time in seconds you get MPH. Works for all classes.
John
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Douglas
The Carrier high speed run is for a nomial 1/2 mile distance. The constant is 1799.28. If you divide that by time in seconds you get MPH. Works for all classes.
John
Also, if you divide it by the speed limit, you get the time that equates to the speed limit (1799.28/70mph=25.704 sec) :)
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Thanx guys!
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One item all this math doesn't take into consideration is the fact that we time from a standing start. The airplane actually has to fly faster than 70 if you are going to get the high speed time at or below the calculated 70 MPH time.
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Standing start on the deck and time ends 7 laps later at the stern of the deck. Remember also the slow speed starts at the stern and ends at the stern. So you lack about 20 feet of full 7 laps on high speed. Another thing is high speed is supposed to be around 10 feet or below. And no leading of the plane. H^^
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7. Laps for AMA profile but 8 laps for 15 profile
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Altitude is " no more than 20 feet for 1/2 a lap" for all classes. Mike
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One item all this math doesn't take into consideration is the fact that we time from a standing start. The airplane actually has to fly faster than 70 if you are going to get the high speed time at or below the calculated 70 MPH time.
This is true. Since we time from a standing start, the model's top speed is actually higher than the high speed score.
However, we never have any occasion to time the high speed from a flying start rather than a standing start, so when we talk about the high speed it is a given that it is from a standing start.