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Everything posted by Don Fry
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Arrrrrr KC, not often we argue, but that is the first step from the path of righteousness, whereby God smites your plane mightily with his hideous weapon, gravity, for straying.
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That of course says, build heavier, cos it’s stronger, and ignoring the bit of physics, heavier= more energy carried, therefore faster to support the weight, and when the faster, heavier weight hits the ground, it has no consequences under Professor Newtons Laws. Build light. History lesson, can anyone show me a wing that failed in the outer panels, trod on by a cow excepted. The stress goes through the middle, reinforce that if needed. Note, full size does tapered main spars. Also being brutal now, trainers have been known to break up if the pilot over stresses it, perhaps, perhaps, perhaps. Too much power, excessive stick throws, poor build, are not involved? Also, being nasty, part of a learning curve?
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“Caught with a drone”, contrary to what law. Caught flying, red handed, different matter, easier said than done. Trying to prove it afterwards, “what drone mate” , where’s your trani “ sold it it a bloke in a pub, said he was going to Timbuktu next day, new saw him before, anything else I can help you with officer.” Bear in mind I’m ex pig, modern ones, being even more undermanned than 20 years ago, and non flyers, without proper training courses are not going to know how to ask the questions. I’ve got a mate, ex DCI, sexual offences specialist, retired. Hired back after being retired for 10 years, to run dad’s desk, as he called it, to mentor, advise, train the children, his words, on how to catch criminals. Rant over.
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Tissue wrinkles on doculam question
Don Fry replied to David perry 1's topic in Building from Traditional Kits and Plans
I just bend it, just get a lever on it so you are strong enough to do it steadily, too fast causes fractures, also a series of fasts, as in hammer blows, is not good either. -
A la Normande, is nice. If an old bird, cook until soft. Easy, does two for dinner. Don’t suppose they eat field fare any more. That’s the pheasant, not you chickens.
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In fairness GG, what bits get frozen is individual choice nowadays.
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I’m in a pugnacious mood. Allegations of vibrations in an airframe made of wood, a natural vibration damper, causing problems with cheap servos. I would suggest, address addiction to cheap servos. At what price point is it possible to make a servo, and feed the producer, and his workers.
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Super cub is a very fine choice. Nice flier. Will get you sorted.
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Totally agree, turn the rubbish off. But low battery warnings good. Somethings wrong if it even dips into this area. I ballast this sort of model, same reason you ballast a soarer in the wind, helps it to penetrate the wind. Also note, lose the weight first, nice in calm, get wind, attach weight on CG. That’s logic.
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I will say, switch. A good switch costs money, if it’s cheap, it’s rubbish, if it’s expensive, (it might still be rubbish) but if it’s a throw switch, or the maker says it fails open, try it. But never cheap. Or you have forum mates, trusted reviews. Lots of switch posts out there
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Doc, fair enough, I’m not too interested in tech, and nowadays even less with telemetry warnings from the plane shouting at me in a desirable accent, but, first line of my post, a J60, ( trundle flight mostly but rudder only rolls and loops also), use about 50 mah of battery per 20 minutes of flight. I also think NiMh batteries are poor things, but that still allows 2 hours of flight, to take about half the power from a 600mah battery. Note for pedants, measurements of power use relate to the numbers given by the charger, to return the cell to full power. I ignore power losses in the charger, batteries, and the principles of thermodynamics. I also dislike adding weight for no reason. Just because it will carry a big wight on the CG , to help in blustery weather, does not mean it flies better like that. Dream, warm summers evening, no wind, scantily clad young ladies serving beer, rolling yer fags, as you carefully waft it along. My view, 2025, all power bits, weather glow, or electric, inc fuel tank, batteries, go in front of the windscreen. Then a 600 mah life battery to power it all, and a pair of HV 15, 20 g servos, behind the wind screen bulkhead, controls to the tail, 10 kg fishing trace. It is tight to fit, it will go it, and with care on a light back end, try balsa depron laminate on the elevator fin, I bet it would not need a gram of weight to put in the nose. I admit, I like light airframes.
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From memory, a junior 60 uses about 50 mah of battery per 20 minute flight. It’s a long time ago, used a 500 mah pack. Flew all day.
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Is that a beer per end mill, an ice cream, or actual money. As a kid, sub 10 year old, dad had me cleaning up bits on his Cincinnati mill for hill climber engines. I settled for contributions for my radio acquisition fund. Just looking after young employees.
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Might you have a quiet sit down, and reevaluate who your mates are. Or your core values. And your need to belong to a society that functions.
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My missus nags that I ignore her moaning at me. I (again) explain, patiently, I need to have my attention on her, much like my elderly deaf whippet. Then we have been known to argue. “I’m impossible” she possits, my retorts that bullying 20 doctors into line when working is all very well for practice, but I’m an old socialist copper, and not for moving. Then we start to discuss things in a heated manner. Hearing aids exist, but I find glasses a major source of wasted time looking for them, so something else to lose, with batteries to boot, fills me with horror
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We will agree to disagree. An aircraft wot needs down elevator to fly staight and level at full clic will dive if that power is taken off. To avoid it, the operator applies up until the excess speed bleeds off, or gets the thrust lines sorted. Thats physics, not fashion.
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WOT4e flying v Junior 60 (with elec conversion)?
Don Fry replied to 911hillclimber's topic in General Vintage R/C Chatter
Thin nylon covered fishing stuff, mine is 15 kilo. Other weights exist, but a mate gave me a reel half a lifetime ago, and it’s still going. -
So what happens, build up speed with power, mixes cut in, cut throttle, does it not dive left. Not saying a bit of mix can’t fine tune, but the airframe thrust angles need to be about right first. Not saying it’s easy, but it has to be done.
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WOT4e flying v Junior 60 (with elec conversion)?
Don Fry replied to 911hillclimber's topic in General Vintage R/C Chatter
I’m mode 2. I’d personally would mix the rudder/aileron. Reason, when you get exited, ie it is not obeying you, you need a turning control on whatever turning stick you slide. Imagine, you slide the wrong stick to turn, nothing happens, panic. Turn is programmed on both sticks, it turns. Delightful aircraft. Easy to fly, perhaps. Someone above is flying a Depron airliner indoors, very low, very slow. Good flier. A J60 can do that, a challenge for those who dismiss them. A circuit of the field, at a meter altitude, touch, run on the ground for 10 meters, ease of and repeat (note, calm day) will cause fatigue and brain ache. BTW, I think it was originally a rudder only design. The Super 60 was an elevator/rudder job. I also think, back in 1946, the power pack was a lead acid battery. I used to strap a pair of pliers on the CG to weight it in blustery conditions. -
Children, play nicely.
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Is this LIPO all right to use?
Don Fry replied to Michael Dearden 2's topic in Batteries and Chargers
That does work, I’ve done it. But do the work outside, it’s a piece of work akin to bomb disposal, but without the bang. I once, mind wandering the multiverse, forgot these are charged batteries, the arc welded the cell wires to gather, I recoiled, AND TOOK STEPS TO DEAL WITH IT, as I walked inside and made a cup of tea. I looked through the kitchen door, at the smok, thinking I’m glad the missus was out, and avoided a noisy lecture. -
Both decent motors, both very reasonable money. Both have the power to loft the Cub. Thereafter 6 of one half a dozen of the other. The ASP is cleaner.