Shaun Walsh
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Everything posted by Shaun Walsh
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covering in words, not pictures.
Shaun Walsh replied to Foxfan's topic in Building from Traditional Kits and Plans
Posted by Jon - Laser Engines on 24/07/2019 15:43:09: what is wrong with the computer? fix that and youtube will reveal all There are some good youtube videos on fixing computers...... Oh, wait -
Posted by Martin Harris on 24/07/2019 14:22:06: I wouldn't be there... Mind you, it does raise the point about defining silent flight. When the term started to be applied to EP models, brushless motors powered by NiCds had barely enough power to turn the propellers of the average model and they struggled to waft around for more than a few minutes. Contrast that with the present day when 50cc equivalent motors whirling massive props, EDFs, pushers and high revving electric models are common. It's arguable that on a typical club day, the noisiest (certainly by perception) models are likely to be electric ones now that 2 strokes are becoming less common. Perhaps one day I'll do some noise tests on electric models...might be interesting! A valid point Martin, it would be interesting to compare the noise output from the same model correctly propped for a 4S IC motor and an electric motor. I must admit that I had a problem with an electric model recently that necessitated the replacement of the motor as the original was running about 0.5mm out of true when you looked at the end of the prop shaft, the reason I noticed was because it was somewhat noisier than normal. New motor and all is back to normal again. The days when you could blat around the sky with a K&B 40F running with an open venturi "silencer" are long gone.
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Posted by Martin Harris on 24/07/2019 13:21:39: I'd prefer to cut out the middle man and just use the engine to turn the prop! But what if the flying field is silent flight only. 😁
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Applying lateral thinking how about one of these? **LINK** Edited By Shaun Walsh on 24/07/2019 13:18:51
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These people are very good for batteries. **LINK** They also sell at a lower price on ebay! **LINK** It was £5 cheaper to buy a new battery for my classic VW from them on ebay than it was to drive a few miles and pick it up from the store. They sent it by courier, next day delivery.
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I may be wrong but you should be OK if the antennae are outside the fuselage. I use these in 2 gliders and the antennae are long enough to poke out of each side of the fuselage **LINK** Just remember to hot melt glue the antenna plugs and sockets together or they may come apart in flight. Other than that they are very good, I have mine set up for flaps camber and crow braking.
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Posted by Don Fry on 23/07/2019 07:06:19: But at 500 quid, that's an economy bike. My wife's machine has a 50 volt battery, 10 amp hours. It covers IRO 50 mile. It folds, Made of carbon. My backside is sore before I have half used the battery. A modern electric bike is a practical solution to train/car/bike commuting. I use mine a lot as a local shopper bike. It's as fast as a car whizzing round the village, and I am built as a (slightly misshaped) sex God, not Apollo. But point taken, batteries will develop, but it's going to take a lot longer that a lot of people believe it will. At least with an electric bike you can keep pedaling if you run out of battery power and get home, not really an option with an electric car
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Posted by Don Fry on 22/07/2019 13:13:46: I wondered. here in France you see Segway machines trundling about. No idea if legal here or not, but I've never heard an explanation of why they (or scooters) are illegal to use on British roads. Because they are classed as motor vehicles and therefore have to comply with construction and use regulations, which they don't. Therefore you can't insure them which is a requirement for road use. They would also need type approval which they don't have. Electric bikes and some mobility scooters are road legal as there are specific regulations relating to their design and as long as they comply they can be used on the road.
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Posted by Toni Reynaud on 21/07/2019 16:04:25: Just for interest................ https://www.wired.co.uk/article/lithium-batteries-environment-impact?fbclid=IwAR0hvO_49eGkcpTeasvDfSZY70N4urjuF2zgWsew25Swug1LmmTQrOFgVyk I dare say that the mining of rare earth metals for magnets for powerful electric motors causes similar environmental issues. But that is pollution in someone else's country so to short sighted politicians with no technical knowledge it's not a problem, in the same way as it's not our problem if we reduce CO2 emissions by outsourcing all our manufacturing to the Far East, we still buy the stuff, ship it here, use it and throw it.away. Politicians only look 4 years ahead and don't have the knowledge to make sensible decisions on anything technical. The problem is that nobody has the guts to address the basic cause of global pollution, overpopulation.
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No Lipo batteries allowed in hold luggage, cabin baggage only, see **LINK**
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I think that is where the problem lies, if it is the same set up as Spektrum then glider settings allow for incremental flaps on the "throttle" stick and motor either on or off via a switch. I didn't like this set up either so I set up my Hobbyking BFG 1600 using the Acro settings and put flaps, camber and crow on switches so I had full control of motor speed. I guess it's done that way because in electric glider competition you want full throttle for a short time to get as high as possible then cut the motor and glide, in the glide phase incremental flaps or camber would be of more benefit than a variable throttle. Have fun tinkering with settings, I'm a returnee after 40 years absence and it took me a while to get my head around computer transmitters.
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Page 156 of the manual here? **LINK**
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Max Riot Motor alternatives
Shaun Walsh replied to Stuart Marsden's topic in Electric Flight for Beginners
I did look for the HK Donkey motor but they appear to be out of stock. -
Of course thermal soaring can be fun, hours of pleasure can be had looking for them after the overambitious use of a strong thermal
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Max Riot Motor alternatives
Shaun Walsh replied to Stuart Marsden's topic in Electric Flight for Beginners
OK, two flights this morning, it was a little windy so rather more use of the throttle than usual. The timer on my Tx is set to 6 minutes and with the original motor if I land when the timer goes off I've got around 33% or so left in a 2200 mAh battery. First flight, mainly just flying around with a bit of basic aerobatics thrown in to check that there were no nasty surprises, it was fine. Landed after 6 minutes, around 30% left. Second flight, full throttle take off, vertical climb and roll, level out at a safe height and start throwing it around. Lots of use of full throttle, had great fun. Landed after 5 minutes, 14% left in the battery. ESC warm but not hot. In summary, much better with the new motor and quieter too. The motor is a straight swap, it's slightly lighter than the original but when installing be aware that you have some rotating motor shaft passing through the same hole in the motor bulkhead as the motor wires so make sure that they don't touch. I would suggest mounting the motor with the wires entering the fuselage at the top rather than the bottom to maximise clearance or cut the shaft down. It's a shame that the battery box is so small, it would be nice if you could fit a 4000 3s in it. Other than that no complaints. -
Max Riot Motor alternatives
Shaun Walsh replied to Stuart Marsden's topic in Electric Flight for Beginners
Not flown it yet, will report back tomorrow afternoon -
Max Riot Motor alternatives
Shaun Walsh replied to Stuart Marsden's topic in Electric Flight for Beginners
I know this is an old thread but thought this might be useful so here goes. After a years use the motor on my riot started being a bit more noisy than usual, it has had one unscheduled arrival nose first some time ago and the bearings needed a touch of oil recently. Careful examination showed that the shaft was very slightly bent so I decided to replace the motor. Wasn't keen on buying a direct replacement as the quality of the original didn't look great so I measured up the available space and had a look at the 4-max web site. The 3541 1070 kv looked like a good choice from the dimensions and specs so one was ordered on Sunday. It was packed and despatched on Monday and arrived at lunchtime today. Good news is that it's a direct swap, even uses the original motor mount so no new holes to drill. Measurements before and after the transplant using a 12x6 APC E prop are: Original motor: 29 Amps, 325W, 1.3Kg thrust 4-Max motor 37A 400W, 1.5-1.6Kg thrust So, very happy, especially with the speed of delivery and the quality of the components. -
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How do you manage to drive off the edge of a cliff? Under the influence of something or just practicing for a Darwin Award?
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Something like this? **LINK**
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What sizes are the prop adapter and the spinner hole?
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My wife has a horse so I hardly see her, she's always at the yard shoveling manure (please note the use of polite terminology). Also, having a horse is way more expensive than my aeromodelling budget as it requires fuel even when you are not using it and vets bills are a lot more expensive than balsa/ply and glue for repairs. Perhaps I should build her a life size wooden horse, any suggestions for IC or electric power? Any Greeks on the forum like to give me some construction tips?
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Cumulus resurrection
Shaun Walsh replied to Shaun Walsh's topic in Gliders and Gliding - General Discussion
Have now tidied up the power pod, put the covers on with an added air scoop made from half a plastic teaspoon for improved cooling and fitted a folding 8x6 pusher prop in place of the fixed one. Measurements show the folding prop draws 14 amps and provides approx 700g thrust whereas the fixed prop draws 17 amps and gives approx 900g thrust. Have ordered a set of 8x7 folding blades to try to improve the thrust. No room for 9 inch blades.
