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Model Forum / Radio Controlled / Air Models / August 2004Model Aviation Mag
Just looked at the new MA. With everyone so safety conscious, I was wondering why they show a picture of someone taching an engine with the tack barely an inch in front of a spinning prop. Don't know about the rest of you, but I always tach from behind the prop. Once saw a prop come off while taching in front. The tach did give its life to save the persons hand though. In this case, it would have been just as easy to take the pic with the tach behind the prop. Details. Details. John VB john: MA has for a while been a good source of pictures of what to do, with text of why you should not do it. a really good example was last year when they had a picture of frank knoll's 40% carden edge in a low harrier, next thing you know, there is a rule prohibiting rudder touches. i wrote for the magazine for a year, and I have little doubt that I could have said that a good estimate of prop speed would be to put your hand into the prop arc and measure the speed at which you lost skin - and no one on the other side would have said a word. P Shame on you for noticing! Don't you know the official philosophy is "Do as I say! Not as I do!" Sheesh! What do you expect? A good example? > Just looked at the new MA. With everyone so safety conscious, I was > wondering why they show a picture of someone taching an engine with the tack [quoted text clipped - 5 lines] > > John VB What!?!? You don't know that reading the rpms from behind the prop is inaccurate? ;-) > Just looked at the new MA. With everyone so safety conscious, I was > wondering why they show a picture of someone taching an engine with the tack [quoted text clipped - 5 lines] > > John VB Yea, you lose at LEAST 1000 RPMs by doing that! ;^) -- Paul McIntosh http://www.rc-bearings.com > What!?!? You don't know that reading the rpms from behind the prop is > inaccurate? ;-) [quoted text clipped - 11 lines] > > > > John VB Not if you put the prop on backwards. <G> >Yea, you lose at LEAST 1000 RPMs by doing that! ;^) > [quoted text clipped - 17 lines] >> > >> > John VB But, if you do that, you have to hold the tach upside down, then you lose the 1000 RPMs again! ;^) -- Paul McIntosh http://www.rc-bearings.com > Not if you put the prop on backwards. <G> > [quoted text clipped - 19 lines] > >> > > >> > John VB Darn! I forgot about that. What you need is an erector prism in the tach sensor's optical path. Pretty simple to grind them from the base of Coke bottle. The tach will then read the correct rpm from behind the reversed prop, with the digits in reverse order of course. No problem if you are dyslexic, and if not just use a small mirror to read it. Hold the mirror behind the prop arc while doing this. or you may void your AMA insurance. Abel >But, if you do that, you have to hold the tach upside down, then you lose >the 1000 RPMs again! ;^) [quoted text clipped - 30 lines] >> >> > >> >> > John VB Well, I'm glad we finally got that one figured out. Or DID we..... ;^) -- Paul McIntosh http://www.rc-bearings.com > Darn! I forgot about that. What you need is an erector prism in the > tach sensor's optical path. Pretty simple to grind them from the [quoted text clipped - 40 lines] > >> >> > > >> >> > John VB Do you guys wear a hat when you fly to protect your head from the sun's radiation? :-) The sun's rays when modulated through a prop can do funny things to your brain circuits. Red S. > Darn! I forgot about that. What you need is an erector prism in the > tach sensor's optical path. Pretty simple to grind them from the [quoted text clipped - 40 lines] > >> >> > > >> >> > John VB I wear a screen mesh hat like the ones that Buddy Ryan wore when he was the coach of the Cardinals. I found that the mesh acted like a blocker much like the screen on the window of your microwave. It was perfectly modulated with my YS .91 on 40% nitro. -- Paul McIntosh http://www.rc-bearings.com > Do you guys wear a hat when you fly to protect your head from the sun's > radiation? :-) [quoted text clipped - 51 lines] > > >> >> > > > >> >> > John VB I used to have a hat. It was a nice red one with my club patch on it. Some old swamp rat down in Floriduh scammed me out of it. That was before that election Dubya won sort of, but that's a long OTstory. I'm more careful dealin' with them people now.. Abel >I wear a screen mesh hat like the ones that Buddy Ryan wore when he was the >coach of the Cardinals. I found that the mesh acted like a blocker much [quoted text clipped - 11 lines] >> >> Red S. Sorry about that! Was it either give it up or eat it? RS > I used to have a hat. It was a nice red one with my club patch on > it. Some old swamp rat down in Floriduh scammed me out of it. That > was before that election Dubya won sort of, but that's a long OTstory. > I'm more careful dealin' with them people now.. > > Abel But the meds now say that because everyone is so afraid of the sun, most folks are low on vitamin D. Cheers -- \__________Lyman Slack_________/ \______AMA6430 IMAA1564___/ \____Flying Gators R/C______/ \__Gainesville FL _________/ Visit my Web Site at: http://www.LymanSlack.com > Do you guys wear a hat when you fly to protect your head from the sun's > radiation? :-) Take that chunk of trivia and go away. NOBODY wants to hear logical thinking! > But the meds now say that because everyone is so afraid of the sun, most > folks are low on vitamin D. [quoted text clipped - 7 lines] > > Do you guys wear a hat when you fly to protect your head from the sun's > > radiation? :-) >What!?!? You don't know that reading the rpms from behind the prop is >inaccurate? ;-) Not only that but the tach can't read in reverse.....what i do to overcome that is install the batteries backwards. Yep, works every time. Now where's that thread that wanted experts??? Mitch |
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