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Next, observe that the blade is canted across the hub - and this is the telling factor. One edge (the leading) will bite into the air, and as it slices thru, push or 'leverage' the air it slices off towards the rear of the plane, or, opposite of the direction you want the airplane to move. That in itself tells you how the prop blades physically operate, and how one should be mounted - so the leading edge will lead as it's spun - and the only thing remaining is to know which direction the motor spins the prop, so you can mount it so it'll do its job. Internal combustion engines have no choice in this, but therein lies a huge advantage brushless motors provide - the ability to reverse their operating direction. Slap a prop on with the leading (thicker) edge frontmost, and if it doesn't blow air to the rear, simply change 2 wires & reverse its direction! Of course, when considering one to order you don't (usually) physically have one in hand to look at and consider its shape or profile. But the fact we can make our BL motors spin either way, basically makes tractor vs pusher props moot -- you can order either and be assured it can be made to work. |
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[QUOTE=Ole Joe;19286739]
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If they were "paying attention" enough to notice, much less to make any adjustment, this simply wouldn't have happened. The RESULTS are more indicative to being as I said - squirt, plop, moved while drying. Quote:
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The bottom line is, we (severally) have shown there are differences, and they don't hugely matter. I like the way mine flies, I'm happy with it, and I didn't build my plane to please anybody else. I'd suggest the best recourse is to agree that we disagree....there's no need to establish a 'right & wrong', & move on. |
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harry |
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Hope to take mine there some day. |
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https://www.rcgroups.com/forums/show...postcount=8414 |
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Gord |
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Last edited by Gordks; Sep 12, 2011 at 11:46 AM.
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Training session....
Got some more stick time in yesterday! Wheeeeee!!!
Day's lesson was flying Figure-8's, coordinating turns with opposite rudder & in fairly stiff wind. My main difficulty is keeping the nose up (level)....she wants to 'dive off' in turns & haven't yet developed the feel for completely counteracting that, but getting better. Sensei Mike told me next lesson would be inverted Fig-8's (while showing me how easy it was).....I told Sensei Mike he was certifiably NUTS! Had a couple of unexpected thrills during the day. Besides the couple of OS moments I saved *LOL* (getting better at that too). Since Irene blew thru, mosquitos and gnats have been horrible. Out in the yard cleaning up damages, the zekes will about haul yo' butt OFF....come back inside & for next hour it's like you're on fire. Gnats on the other hand....with the windy conditions it's extremely dry out around the airfield, and they will almost literally COAT you, getting in your eyes, nose & ears looking for moisture. I broke out an almost new can of OFF & shared with the members & families - it was near empty before long....and them dang gnats soon licked that off & came back for more! One REAL 'OS moment', I was in mid-turn supposed to level out & fly down the runway (as instructed), and I inhaled one! And I mean it stuck right in the sweet spot of my coughing mechanism....I couldn't even breathe! Thank 'the rules' or whatever, that Mike was right there to grab the box while I was in convulsions - and I was that! Not fun!!! I mentioned families. We also used the day for a couple-weeks-early club meeting/planning meeting for a Big Bird Fly-In we're hosting Sat. Oct. 1st. We also had a cookout, thus the families were invited. The other 'thrill' was, with 4 slow-&-low parkflyers furballing it just above the runway, a 3-year old kid (you know how they can get gone in an eyeblink) decides to break away from Mom & run out across the runway. Mom saw him too late, screeches & takes out after him, so there's HER on the runway.....and the 2-yo she set down to go after the 3-yo, decides to take out after the running mom! Can you say "pandemonium"?? Mom then banishes Mr. 3yo to the confines of their SUV....soon after which he discovers Mr. Headlight Switch, & Mr. Car Horn. Only took mom about 5 minutes to do anything about it. Mr. Spanking was apparently not in attendance. << Mr. Rolleyes. *LOL* One other thing....Mr. SuperCub came in Sat'dy via FedEx, so I'd arrived at the field a little early to put it together. Our CSO arrived a few minutes after, gave it the once over & declared it un-flyable. It uses a 'banished frequency', due to a history of causing interference with other radios. Couldn't just swap over to another receiver & use my regular Tx as I thought -- it uses 5-wire servos & the ESC is built into its Rx. *sigh* Looks like this'n will have to be my secret 'Cornfield Trainer' until I can do a full upgrade. So....there's my weekly flight training report, & my luck in action. And th' beat goes on. |
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I'm no expert, but that is what I did..(CG is maintained) here's a picture of them...This was a temporary set up so don't laugh to hard at the "tape job"
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How conveeeeeeeennnnient. |
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