Guest ozzie Posted November 13, 2006 Posted November 13, 2006 Just wondering if anyone is into electric models. especially large scale. Or can put me in contact with someone who is. thanks. OZ
Guest ozzie Posted November 13, 2006 Posted November 13, 2006 lookingat 8/12kw@ 48vrange... more worried about getting electrocuted than burning ;)
Guest danda Posted November 13, 2006 Posted November 13, 2006 Ozzie there is a model group in Singleton. Don
wanabigaplane Posted November 13, 2006 Posted November 13, 2006 Bigger electric models Read the latest Australian mag 'RCM News' (No80) - a review of a Hacker A-50 brushless motor and associated parts. This one is 1200-1400 watts. Yes, kilowatt range! This article is a pretty down to earth 'what you get for your money' discussion on size of model, performance, selection of motors and batteries etc. A good website to look at is www.aircraft-world.com Jack. wanabigaplane
Guest ozzie Posted November 13, 2006 Posted November 13, 2006 Thanks i'll get the mag and singleton is just up the road. thanks again
Guest ozzie Posted November 20, 2006 Posted November 20, 2006 Chris, I haven't paid any attention to model aircraftsince i watched my younger brother wrap a control line trainer around a pole. it went around about 4 times getting faster each turn until it exploded in a puff of balsa. thememory of my brother standing there holding on to the droopy control line. "priceless" Jack, the magazine was a real eye opener.Even tho eveyrthing is to small for my intentions there is still a lot of usefull information there. i'll have to go to Maitland and check out the jets.And maybe a trip to the model store for christmas shopping next week. Ozzie
Guest gosk8ing Posted December 19, 2006 Posted December 19, 2006 Hey, If you want to go big in R/C, i would recommend going petrol. When you start going into bigger sizes, eg. 40 size (about 2.2kg - 2.8kg), the Li-Po battery for it costs about $500 and if you crash your model, it is very easy to damage a cell in the lipo; once that happens, throw away the battery. Petrol is alot more durable is you crash them than electric. Cheers.
wanabigaplane Posted December 29, 2006 Posted December 29, 2006 Oh, I get it !! Modellers talk about 100 watts per pound for solid aerobatic performance. For 8-12 Kw, this means your project aircraft is in the order of 55Kg. Hardly newbie stuff. Sure you've got your numbers right ?? Oh, I get it. You want to electrify and radio control your Lazair !! Jack.
pylon500 Posted December 30, 2006 Posted December 30, 2006 What makes you think he wants to Radio Control his Lazair? I think he wants to actually FLY it as an electric ultralight! Sounds alright to me, 4 x 1400 watt motors with small gear boxes driving lightweight carbon fibre props. Gonna need some hefty speed controllers! Arthur.
Guest ozzie Posted December 31, 2006 Posted December 31, 2006 yep thats right i want to fly my lazair on electric power. some big developments in this field happening now. and it is possible with off the shelf R/C motors and controllers. In paticular the german Plentenburg 'Predator' motor and controller and about $3,0000 worth of LiPo's. the biggest hurdle , other than the cash outlay for two of everything. (Lazair is a twin engine) is cooling both the motor and controllers. and it is a big thing. Cost is about on par with upgrading to solo or hirth engines. and the cost for the batteries is really like buying fuel in advance. so as long as i can find a way not to overheat these motors it is possible. I am holding back for two reasons at the moment. 1 i want to see how the electric paraglider goes with it's purpose made motor and controllor. that is due for release about may 2007. and 2nd, the results of what is being termed as 'covert research' on batteries that the Koreans are doing for the automotive industry. huge increases in capacity from 5amp to between 30 and 70 amp with 30 times discharge rates. expected during 2007. ceramic batteries look like the next big advance. I am looking forward to smooth INSTANT power with no warm up reliable inflight restarts. curious? do a googal for electric powered paraglider. several videos and interview with Casba on powered paraglider radio show. I'll see you all in the 21st century. don't forget to renew your co2 detector in the cockpit. happy New Year all Ozzie
wanabigaplane Posted January 3, 2007 Posted January 3, 2007 Hmm - interesting. Ozzie - Be aware, LiPos can be dangerous in a crash. Remember just recently one computer manufacturer recalled 4 million laptop computers because some LiPo batteries had spontaneoulsly combusted. You will need soft start, as well as over current switch off, capability in your two speed controllers. Fliers of competition models store / charge their LiPos in pyrex cookware, or in metal safety boxes. LiPos can get hot in operation too, and may have to be cooled. Although you can go up to 20 to 30 C max for short periods, planning on 12 to 15 C max for normal operation is the norm. Also for longevity of the batteries, avoid discharging beyond 2/3 the capacity of the cells. A set of batteries like this is going to require a specialist charging system, and a specialist charge balancer too! The leading edge of technology is very close to the bleeding edge of technology. Jack.
pylon500 Posted January 3, 2007 Posted January 3, 2007 bleeding edge of technology It can certainly bleed your wallet! Arthur.
Guest ozzie Posted January 4, 2007 Posted January 4, 2007 Yes your remarks on LiPos are well noted I will be breaking down the battery packs into at least four smaller units for charging as a charger for the size i need is worth a fortune. the controllers i am looking at are programable for soft start and best perfomance over the power range and settable cutout/warning when settable cutout voltage is near. It all sounds simple on paper but lots of things to consider. You can do a lot of damage with a battery that can discharge at 30 times its capacity. I am interested in these new ceramic batteries that they are working on now. the automotive industry is moving this area so fast now it is hard to keep up. thanks for the tips i appreciate it. i am not proud to say i need all the help i can get. Ozzie
Downunder Posted August 13, 2007 Posted August 13, 2007 An old thread, but I'll bump it anyway....... Sonex is onto the electric thing....... http://aeroconversions.com/e-flight/ Regards, RJM
Guest ozzie Posted August 13, 2007 Posted August 13, 2007 It can certainly bleed your wallet!Arthur. wait till the smoke escapes, it comes out in dollar signs. the sonex package looks very neat ozzie
Guest ozzie Posted December 25, 2007 Posted December 25, 2007 http://www.apame.eu/Projet03.html A new development in France using electric power in a 115kg + 40kg motor and batteries ultralight called the 'Souricette' (mini mouse) the flight lasting 48 minutes. China, France, Germany and the US are all in the final development stages to introduce a marketable powered paraglider within the first quater of 2008.
Downunder Posted December 28, 2007 Posted December 28, 2007 Don't know if you've seen this one. http://electraflyer.com/index.html I know one thing though,"It aint cheap" !!!!
Guest ozzie Posted December 29, 2007 Posted December 29, 2007 nothing is cheap these days. in what way do you think this is expensive? ozzie
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now