David E Posted April 24, 2009 Share Posted April 24, 2009 Just as I was going to ask for recommendations for a prop, motor, esc and battery combo for an old and slightly battered RipMax Alienator, up pops a photo of one in an article on discontinued items! I have just picked one up 2nd hand minus prop, motor, batteries and ESC. It's possibly the most ugly model plane ever made (and the paint scheme on this one is crazy, the plane was thrown in with another 2nd hand plane I bought, probably because no-one wanted this ugly duckling!) but I'd like to get it flying. I've tried searching around to see what others have used, but being old, it's all brushless and NiCad setups. I'll have to post a photo some time, the paint job is quite special!!! :D Edited By David E on 24/04/2009 18:08:30 Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 24, 2009 Share Posted April 24, 2009 Right - first off it dont have to be ugly - subjective opinion of course, but I reckon mine looked pretty evil, in a cool way IYKWIM. Mine had a Mega 22/20/3E inrunner and ran on 3S 2000 m/a Kokam Lipos and a 9 X 6 folder prop - this gave 495 Watts which came out at 190 Watt per lb. Went rather well I have another NIB here waiting in the queue of things to build, and will use the same setup, except that batteries will be lighter and hold better voltage than the old 12C Kokams of those days - also will cost a heck of a lot less ( they were over £45 each ) Yikes Edited By Timbo - Moderator on 24/04/2009 18:59:33 Quote Link to comment Share on other sites More sharing options...
Paul Adams Posted April 24, 2009 Share Posted April 24, 2009 Picked one up at a model auction a couple of months ago, partly built but without any instructions. Can find plenty of info on which motor to fit, how to strengthen it, but can not locate anything as to where the C of G should be located and what control throws to use. Can anyone advise? Thanks in advance. Paul Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 25, 2009 Share Posted April 25, 2009 Hi Paul, hang on I will dig out the manual. Right COG is located at 95 mm forward of the central spar. However I found in practice that mine ( or me at least ) lliked it best at around 90mm. Control throws incidentally are 20mm each and every way on el and ail.Edited By Timbo - Moderator on 25/04/2009 08:38:18 Quote Link to comment Share on other sites More sharing options...
Paul Adams Posted April 25, 2009 Share Posted April 25, 2009 Thanks Timbo, much appreciated. Hopefully have it flying in a couple of weeks and will send you an update. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 25, 2009 Share Posted April 25, 2009 Cool.... I loved mine and thats why I bought another - even though it had flown a heck of a lot. It was back in the dark ages before 2.4Ghz and wa sthe only model I have ever lost in the last 15 years or so due to radio failire. I was on PCM JR gear, and had a PCM lockout which sent the surfaces to the preset failsafe positions which I had dialled in. These were - throttle off, ailerons level, and tad of up elevator. Should have been fine then. However PCM lockout occured whilst inverted, about 2 ' off the deck Needless to say its replacement will be on 2.4Ghz Quote Link to comment Share on other sites More sharing options...
David E Posted April 25, 2009 Author Share Posted April 25, 2009 Timbo, that's quite a neat paint job. The black stripes help to hide the shape of the canopy and the fins, which are the bugliest parts IMHO. CofG and throws info will be useful. The 22/20/3E seems to sell for £70-£75 pounds. Is that the general price for motors of sufficient power for this model, or are there cheaper options out there now with similar specs? Thanks! Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 25, 2009 Share Posted April 25, 2009 There will be plenty of cheaper suitable motors around these days David - I was bit limited in those days, and the Mega motors, although excellent motors are not cheap ! AUW was only a tad over 2lb so aim for say 300 Watts and it will be fast. If I was choosing a powertrain today, I would probably go outrunner and a slightly larger prop. Maybe something like this? Quote Link to comment Share on other sites More sharing options...
Bert Posted April 26, 2009 Share Posted April 26, 2009 Mine went very well with the Aveox 1406/3 and eight nicads. IIRC I used an 8 x 6 APC - a bit overpropped on the ground but it must have unloaded a bit in the air because I didn't burn it out! There wasn't a lot of room and the ESC had to sit next to the nicad pack which got quite hot, the ESC didn't give any trouble in spite of this treatment. If I can find a photo I'll post it. Bert Quote Link to comment Share on other sites More sharing options...
David E Posted April 27, 2009 Author Share Posted April 27, 2009 Thanks for all the info. I must admit I'm a bit baffled by brushless motors. The specifications provided by retailers always seem incomplete (at least they give different info for each motor!) and I've no idea how to work out what motor/prop combo provides the wattage I'm looking for! Perhaps I should give someone like Puffin a call and work out a good combo? I hear they're well clued up... Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 27, 2009 Share Posted April 27, 2009 Puffin are indeed well clued up on such stuff - but be warned they dont sell cheap stuff ( not meant as a criticism incidentally ) If you want budget gear, then try BRC or perhaps foamyjets etc. Go for a medium Kv motor ( around 1100 - 1500 maybe ) and a 9 X 6 flew mine very well on 3s Lipo. Aim for approx 250 watts, which on 3s is about 24A, so a 30A ESC with a BEC unit for radio power should do you. I did give a link earlier to something that would be OK. Quote Link to comment Share on other sites More sharing options...
flytilbroke Posted April 27, 2009 Share Posted April 27, 2009 I nearly ordered a brushless and Bec for mine which has been in the hanger for the last five years. Went for an "over the top " 'puter instead. Next year perhaps, at least the woodworm won't touch it. Quote Link to comment Share on other sites More sharing options...
David E Posted April 28, 2009 Author Share Posted April 28, 2009 So... if I purchased: The motor Tim suggested: http://www.brchobbies.co.uk/?page=shop&item=514 a 33A, 2-3S, 2A BEC, Brushless ESC: http://www.brchobbies.co.uk/?page=shop&action=additem&item=407 A 2250mAh 20C lipo: http://robotbirds.com/catalog/product_info.php?cPath=63_262&products_id=1918 and a prop: http://www.brchobbies.co.uk/?page=shop&action=additem&item=977 I should be ok? Would I need a prop saver or a spinner? I notice that the front of the cowling is quite a large diameter? Or would a folding prop be a much better option for this model? eg: http://www.brchobbies.co.uk/?page=shop&action=additem&item=1014 and http://www.brchobbies.co.uk/?page=shop&action=additem&item=884 I've seen a few places where people mention about 3lb for all up weight. Is this because of older brushed motors and nickel cells? If it is about 3lb, will the setup above still be ok for moderate performance? (don't need anything tooo crazy just now!) Many thanks guys - I feel like i'm really struggling to get my head around all the technicalities of motor specs, powers, props etc. so this is a great help. Quote Link to comment Share on other sites More sharing options...
David E Posted April 28, 2009 Author Share Posted April 28, 2009 Ouch! BRC seem steep for postage! Seems you don't make any savings putting lots of things in one order Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 28, 2009 Share Posted April 28, 2009 I doubt you will end up at 3lb TBH David. I glassed mine for strength, and added extra spars here and there also, and still ended up at only just a tad over 2lb. I recommend a foldi ng prop - I used a very nice graupner setup from Puffin ( 9 X 6 ) with a good quality collet style prop adaptor and ali spinner - completre with cooling hole in the tip. I will see if I can find it and post a piccy. Not cheap.....but very good. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 28, 2009 Share Posted April 28, 2009 Here ya go.... still with the mud on it from its demise of several years back If you do buy one or something similar - be very sure you get one with the correct collet for the shaft size of the motor you get. These can and do vary by just fractions of a mm and they are not interchangeable. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted April 28, 2009 Share Posted April 28, 2009 Incidentally, on costings - the Mega motor on mine ( as in picture ) whemn purchased back then cost me over £60, the JETI 40 ESC was around the same amount, and the battery ( Kokam 2000 at just 12C was about £45 ). Heck of a cost for a 30 quid foamyy Hope that helps to keep things in perspective Quote Link to comment Share on other sites More sharing options...
David E Posted April 28, 2009 Author Share Posted April 28, 2009 Hehe, yeah, the issue with the cost side of it is that my wife is complaining that this hobby is too expensive, and I haven't even got anything I can fly outdoors yet! The other aircraft I picked up with this one is a Multiplex Twinjet with two brushed 480s that just needs a battery and some rewiring for my receiver's connectors. I'd like to get the alienator airworthy as a 2nd aircraft in case of black bag usage. Because of this I may put off buying the gear for the Alienator a little while, but I want to know what to get and how much it'll cost so I can budget for it, and maybe to buy bit by bit! Quote Link to comment Share on other sites More sharing options...
Norman Adlam Posted May 1, 2009 Share Posted May 1, 2009 Aaahhh, you've all teased me now! I've had a brand new Alienator in the box in my model room for a few years - and after reading this have decided to finally build it! Will fit it out with a brushless setup, of course! Cheers Quote Link to comment Share on other sites More sharing options...
David E Posted May 1, 2009 Author Share Posted May 1, 2009 Here we go, photo of aforementioned alienator. I don't think the photo quite does it's ugliness justice! The orange bits are bright orange, not as red as they look in the picture. The grey foam is also showing through the paint in most places. Note chunk missing on far left of picture, dented leading edges, repaired crack at wing root and numerous cooling holes! I suppose it's growing on me though, I suppose. Looks like a 50mm spinner is needed to make a smooth shape with the front moulding. The better news is that I got the Twinjet flying last night! :D What a blast! Quote Link to comment Share on other sites More sharing options...
Bas La Bois Posted May 1, 2009 Share Posted May 1, 2009 Has anyone out there got an alienator that they want to sell? I've looked everywhere for months and only came up with one in South America but of course the postage was ridiculous, worse than from the States. So if anyone wants to get rid of one; built or unbuilt, then let me know. Luc G. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted May 1, 2009 Share Posted May 1, 2009 Luc - why not put this in the advert section ( classifieds ) Quote Link to comment Share on other sites More sharing options...
Bas La Bois Posted May 2, 2009 Share Posted May 2, 2009 Hi Timbo Sory if this is the wrong place to put this request but I thought it was a related thread. Luc G. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted May 2, 2009 Share Posted May 2, 2009 No apology needed Luc - was just suggesting that it might get you more response - its absolutlely fine to post here as well. Good luck with your search. Quote Link to comment Share on other sites More sharing options...
Norman Adlam Posted May 14, 2009 Share Posted May 14, 2009 OK, I finished my Alienator! Just got to get some good weather for the maiden. Here's a couple of piccies on the colour scheme! Quote Link to comment Share on other sites More sharing options...
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