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#21
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Ed Rasimus wrote:
(Walt BJ) wrote: In primary flight training in 1953 we had to do all those old things in the T6G. Radio range was done at Tallahassee; I forget where we did non-directinal beacon NDB work. 'Manual loop' - RDF - was worse than chewing gum and walking at the same time. The real answer was to do the loop bit when straight and level, figure out which way to turn, concentrate on the turn, level out, fool with the loop again. The 'dirty tricks' department put the ADF panel and loop crank handle down between your ankles in the T33! FWIW RDF - manual control of the loop - works better than ADF in bad static conditions. Also FWIW our 25 watt NDB homer at Naha AB on Okinawa was but a few Khz away from a monster station at Shanghai. RDF worked better when out a hundred miles or so. The simplest loop I ever heard of was a couple turns of wire around the aft fuselage of a Piper Cub; gentle turns right and left sufficed to find the bearing to the station. It took time, but Cub pilots have a lot of that at 1.5 miles per minute. Walt BJ C'mon, Cubs go faster than that! I do recall, however, getting my initial Cub flying around Chicago that with wind conditions right, you could land and turn off at the approach end taxiway on many days and with a 100 foot wide runway you could almost always land "into the wind" by simply flying cross-runway. Why not? Whereas I generally won't land perpindicular to the runway, I routinely land aslant the runway (usually no more than a 45-deg. angle to the runway centerline) in my trike so as to reduce the x-wind component. And a Cub going faster than 90 miles per (groundspeed?) I dunno, but I can comfortably fly in formation with Cubs and Champs in my trike and it only cruises about 60-70 mph over the ground (in calm air). When it comes to rate of climb, I spank 65-hp Cubs and Champs with my 80-hp trike. As long as we're reminiscing about procedures from the dark ages, let me throw in the infamous "time and distance" check we used to demand of students in the T-37. Flown on a VOR, you turned to put the bearing pointer on a wingtip, then timed how long it took to get a 10 degree bearing change. Knowing your ground speed (which you usually didn't) you could then calculate the distance from the station to fly that arc in that length of time. The way we used to turn VOR's into DME's: 1) Turn perpindicular to the radial. 2) Note the time and number of degrees of change. 3) Divide time (in seconds) by the number of degrees of change to obtain minutes away from the station. For example, (it's been a while since I've done this, but it does work), say you crossed 5-degrees in 2 minutes, 43 seconds (163 seconds). 163 divided by 5 = 32.6 minutes away from the station. I guess it must have been accurate to within about ten miles. It never made sense in a tiny jet which short legs to waste that much time determining something you should have had a pretty good idea about anyway. Yeah, it was pretty much a WAG, but it kinda' works (accurate only flying in "no-wind" conditions). -Mike Marron |
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