Brian Dorricott 1 Posted August 28, 2020 Share Posted August 28, 2020 I have a surplus NGH 17cc petrol engine and cannot decide what to put it in plane wise . I know that a 9cc NGH is 46-50 ish but not sure what the petrol 17cc equates too . Anyone put the NGH 17cc in anything interesting and what size was it ? It looks a big lump when it's your hand but I'm using a G5 plug so no battery and cdi ( got toasted in a fire) so weighs little less. Any successful marriages using NGH 17cc out there ? Or should I sell it and buy a Zenoah . Quote Link to comment Share on other sites More sharing options...
Richard Wills 2 Posted August 28, 2020 Share Posted August 28, 2020 lad at our club had one in a wot 4 xl, 68" and 10ish lbs. Flew fine but not exactly powerful. A decent 91 glow would embarass it. Quote Link to comment Share on other sites More sharing options...
Colin Hooper Posted August 28, 2020 Share Posted August 28, 2020 I have fitted the NGH 17cc into an Acro Wot and a Seagull Edge 540 (the 60 size one) Both fly very well and with the Just Engine pepper pot in the exhaust they are often thought to be 4 strokes. Quote Link to comment Share on other sites More sharing options...
Dale Bradly Posted August 28, 2020 Share Posted August 28, 2020 I've got one in a 72" Harvard and it goes bloody well, almost too much power. I'd happily put it in any scale/warbird looking for a .91 4st or thereabouts. Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted August 28, 2020 Share Posted August 28, 2020 Got mine in a Seagull Funky Cub, tonks it around no bother, lovely big aeros with it, throttles nice and is quiet on a wrap around pitts exhaust 14x8 on, good on juice as well. Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted August 28, 2020 Author Share Posted August 28, 2020 Some good ideas and no gloop to clean off after every flight , plenty of choices in that range . Anything 60 size sounds just right then thanks for replies Harvard or Acrowot sound nice . Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted August 29, 2020 Share Posted August 29, 2020 Posted by Brian Dorricott 1 on 28/08/2020 19:57:01: I have a surplus NGH 17cc petrol engine and cannot decide what to put it in plane wise . I know that a 9cc NGH is 46-50 ish but not sure what the petrol 17cc equates too . Anyone put the NGH 17cc in anything interesting and what size was it ? It looks a big lump when it's your hand but I'm using a G5 plug so no battery and cdi ( got toasted in a fire) so weighs little less. Any successful marriages using NGH 17cc out there ? Or should I sell it and buy a Zenoah . Help me understand please Brian How can the motor be used without an ignition ando Somehow the 90 motor is to be used in a 60 size model Thank you Quote Link to comment Share on other sites More sharing options...
cymaz Posted August 29, 2020 Share Posted August 29, 2020 There’s about 16cc to the cubic inch. So any .90 size airframe would be in the right area. Just remember the extra weight of batteries and room needed for ignition box. Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted August 29, 2020 Share Posted August 29, 2020 Brian is the G5 petrol glow plug a direct fit, i.e. the same thread as the spark plug or do you need an adapter? Quote Link to comment Share on other sites More sharing options...
Brian Dorricott 1 Posted August 29, 2020 Author Share Posted August 29, 2020 As the NGH 17cc is already a petrol engine if you put in the G5 plug and ignite it voila it runs no differently from using the CDI pack . As my CDI packs all got burned in a fire but the engines were elsewhere £7 for a G5 plug or £50+ for a CDI was a no brainer ! This setup is no different to the smallest petrol OS 2 stroke but is only applicable to petrol engines with same size thread as a glow plug . No extra battery and CDI weight to worry about , the only real downside is the bark of the engine despite buying a "quiet" exhaust from JE . It is a little loud at WOT and the noise a gruff bark but that's nothing really to do with ignition swop but the exhaust design . Look up OS GGT10 petrol engine that's the same setup and OS don't usually get it wrong ! Quote Link to comment Share on other sites More sharing options...
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