Rusty C Posted February 23, 2015 Share Posted February 23, 2015 hey guys can I get some ideas for a new airframe for an sc .70 four stroke. However the engine needs to be mounted upright as I have had heaps of greif trying to set up an inverted arrangement. Quote Link to comment Share on other sites More sharing options...
Simon Taylor 1 Posted February 23, 2015 Share Posted February 23, 2015 Put it in one of your wots - with a smallish prop - it is a hoot! Quote Link to comment Share on other sites More sharing options...
cymaz Posted February 23, 2015 Share Posted February 23, 2015 Something like this? Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted February 23, 2015 Share Posted February 23, 2015 I've always thought one of these would go really nicely on a 70...might need a touch of strengthening at the front though... Certainly on my !to buy" list.... Quote Link to comment Share on other sites More sharing options...
Rusty C Posted February 23, 2015 Author Share Posted February 23, 2015 I like the look of that z50 Steve, I have a pulse xt 25 e that i really enjoy to fly so was wanting something along that lines. That should take the 70 upright ok I'd think. Cheers Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted February 23, 2015 Share Posted February 23, 2015 Nice isn't it..... I think its designed to take the engine side mounted.....your SC70 should be OK mounted sideways....would be a shame to spoil those nice lines with a big cylinder....I think you might find the tank might be a bit too low & cause running problems with an upright engine.... I have a few side mounted 4 strokes & they behave perfectly.... Quote Link to comment Share on other sites More sharing options...
Jon H Posted February 24, 2015 Share Posted February 24, 2015 Side mounted would work well. If you are really set on upright then the seagull isport would be a good choice. Incidentally, what issues do you have with the engine running inverted? it shouldn't be any trouble and I would say that 90% of the engines I run are inverted and all are 4 stroke. Quote Link to comment Share on other sites More sharing options...
Rusty C Posted February 24, 2015 Author Share Posted February 24, 2015 I couldn't get it to idle for more than 20/30 seconds when it was performing correctly, it is/was fitted to a seagul AT-6 at a sort of 8 o'clock position, near the end of my and others teather we started to point the finger at the tank position. The bulkhead was always very dirty with fuel so siphoning was a problem. The engine is running beautifully on the test bed so would like to use it in something, it might just be fine at a horizontal orientation. Thanks for the in put lads Quote Link to comment Share on other sites More sharing options...
David P Williams Posted February 24, 2015 Share Posted February 24, 2015 Perfect for an Acrowot - side mounted. Mine flies great with this engine. Quote Link to comment Share on other sites More sharing options...
Rusty C Posted February 24, 2015 Author Share Posted February 24, 2015 I did look at the acro David, how is the quality of the kit anyway? Cheers Quote Link to comment Share on other sites More sharing options...
David P Williams Posted February 24, 2015 Share Posted February 24, 2015 Mine was fine, no problems. Went together well and flies great, the SC70 with a 13x8 is a perfect match I think. Quote Link to comment Share on other sites More sharing options...
.. Posted February 24, 2015 Share Posted February 24, 2015 Acrowot would be my suggestion. The problem you had in the Texan was probably more to do with the tank position in relation to the carb hight , no such problems with the Acrowot. My flying buddy has the Zlin suggested by Steve and runs in on an ASP 60 fs. It goes well on that so your 70 would be a good choice. It seems a well built airframe except for the U/C mount, that's weeker than if it were made of cheese. Quote Link to comment Share on other sites More sharing options...
Jon H Posted February 24, 2015 Share Posted February 24, 2015 Hi Rusty. That's most unusual, how much did you lean off the slow run needle as it should have been possible to get it running reliably. Also when you lean off the top end do you then richen it up and if so by how much? Quote Link to comment Share on other sites More sharing options...
Concorde Speedbird Posted February 24, 2015 Share Posted February 24, 2015 Is it a new engine or second hand? It would be good to get it running at any position since an aerobatic aeroplane will not stay upright! A Wot 4 or Acro Wot would be lovely on that engine.CS Quote Link to comment Share on other sites More sharing options...
Rusty C Posted February 24, 2015 Author Share Posted February 24, 2015 Thanks guys I will decide between the zlin, isport and the acro wot soon and get assembling. The AT 6 was a bit of a let down after it went together well and generaly a good quality kit, I guess it would have been fine with a 2 stroke. I am just in the process of robbing the parts from the AT 6, is its just me or is it hard to put a model down? Feels weird taking them apart but the wife would go nuts if I have more than 4 planes Quote Link to comment Share on other sites More sharing options...
.. Posted February 24, 2015 Share Posted February 24, 2015 Yes it's anoying Rusty I've had this with an ARTF ME 109, the tank was just so high above the inverted engine that the fuel would syphon out when it wasn't running. It was ok at high revs bit it wouldn't idle. A Perry pump may have sorted it but I lost heart with it in the end. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted February 24, 2015 Share Posted February 24, 2015 Simply adding a loop to the fuel feed tube often stops the syphoning issue...works for me. John Quote Link to comment Share on other sites More sharing options...
.. Posted February 24, 2015 Share Posted February 24, 2015 Not for me on that one. Quote Link to comment Share on other sites More sharing options...
Geoff S Posted February 25, 2015 Share Posted February 25, 2015 Posted by Rusty C on 24/02/2015 16:13:38: I am just in the process of robbing the parts from the AT 6, is its just me or is it hard to put a model down? Feels weird taking them apart but the wife would go nuts if I have more than 4 planes Blimey. I have 5 models in the garage which is really a bike shed combined with my wife's garden shed (she won't allow me in the garden, which suits me very well). There are 2 electric gliders next to my desk here. Then there's the indoor stuff (Vapor, 2 V911, a V912, and a small quad) plus an unknown number in the storage above. There's also so a 1 metre racing yacht and Thames sailing barge under construction. She's put up with me for 48 years which included an unknown number of motor cycles for many years. As far as I know there are no divorce proceedings in the offing. Surprised you couldn't get the SC70 to run inverted. My SC90 was fine. I had remote glow and a remote needle. I would think it would suit an Acrowot very well in a sidewinder configuration as others have said. Geoff Quote Link to comment Share on other sites More sharing options...
Rusty C Posted February 25, 2015 Author Share Posted February 25, 2015 Yeah I do the motorcycles and cars also so have plenty " rubbish" about a she says. Probably go for the acro I think looks a good flying thing. The sc inverted would either idle great and run utter rubbish or run well and wouldn't idle for nothing. So I just gave up on the model, hopefully I will get the engine in the air soon as it done nothing but be run on the ground lol Quote Link to comment Share on other sites More sharing options...
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