Martin_H Posted April 15, 2017 Share Posted April 15, 2017 Started my Wot4 Xtreme build today. Well started the airframe part, anyway. Fitted up the Saito 60R3 Gasser - custom 3 point mount and vibration absorbers. The standard Saito mount wouldn't easily adapt for vibration absorbers so I designed and had cut a 3 point mount that also fitted the Wot4 firewall without fuss. Saito is fitted with a Keleo exhaust collector ring. Wanted as little vibration as possible as I want to carry a pod with LIDAR and InfraRed to do aerial crop surveys. Electric was an option but this combination will give me many hours of on site flight time. Only need to charge 2S ignition and receiver packs! Fitting DuBro 6" inflatable wheels for better suspension. Quote Link to comment Share on other sites More sharing options...
Former Member Posted April 15, 2017 Share Posted April 15, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Mark a Posted April 15, 2017 Share Posted April 15, 2017 Blimey thats some motor for that airframe. Quote Link to comment Share on other sites More sharing options...
Rich too Posted April 15, 2017 Share Posted April 15, 2017 Lovely motor Sub'd. Quote Link to comment Share on other sites More sharing options...
Martin_H Posted April 15, 2017 Author Share Posted April 15, 2017 Posted by Percy Verance on 15/04/2017 08:46:04: Be careful Martin, it might tear the airframe apart.............. Yep, manufacturer recommends up to 55cc 2 stroke gassers, so given the smoothness of 3 cylinders and being a 4 stroke gasser should work in my favour. Quote Link to comment Share on other sites More sharing options...
Martin_H Posted April 15, 2017 Author Share Posted April 15, 2017 One thing is certain, I wont have to add nose weight! Quote Link to comment Share on other sites More sharing options...
Devcon1 Posted April 15, 2017 Share Posted April 15, 2017 Very nice, as they say if you're going to get one get a big un. Cowl fitting will be interesting 😁 Quote Link to comment Share on other sites More sharing options...
Martin_H Posted April 15, 2017 Author Share Posted April 15, 2017 Posted by Devcon1 on 15/04/2017 09:01:44: Very nice, as they say if you're going to get one get a big un. Cowl fitting will be interesting 😁 Kit cowl is no option, firewall to spinner backplate is 5mm too much! I could machine back the standoffs but the amount of cowl removed would be so excessive as to leave minimal...Might go for a radial cowl if it ends up looking too fugly. Then again, not only getting a big un but if you got it flaunt it! Quote Link to comment Share on other sites More sharing options...
cymaz Posted April 15, 2017 Share Posted April 15, 2017 I would expect the radial to be very smooth....my Evolution is. I will bet my last dollar that the airframe will be OK. Usual things with ARTF though check U/C mounting get some form of strengthening by way triangle fillets in anyway you can wire brace the tail. Any vibration seems to affect the tail on big Wots metal geared servos Stunning build BTW Quote Link to comment Share on other sites More sharing options...
Martin_H Posted April 15, 2017 Author Share Posted April 15, 2017 Posted by cymaz on 15/04/2017 09:07:51: I would expect the radial to be very smooth....my Evolution is. I will bet my last dollar that the airframe will be OK. Usual things with ARTF though check U/C mounting get some form of strengthening by way triangle fillets in anyway you can wire brace the tail. Any vibration seems to affect the tail on big Wots metal geared servos 8 kg servos all round and 11 kg on rudder. After choosing the Saito I found Morris Motors do a 4 stroke conversion for Evolution gassers. 7 cyl 77cc radial might have been pushing a number of envelopes, though. Quote Link to comment Share on other sites More sharing options...
Rich too Posted April 15, 2017 Share Posted April 15, 2017 Who needs a cowl! A couple of other things I would consider, c/fibre u/c, and seal all surfaces. Having said that, I don't think that motor will be a problem. Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted April 15, 2017 Share Posted April 15, 2017 Why would the radial tear the airframe apart? It's much more smoother than a single cylinder engine and has no pulsing effect, just smooth power. The Wot4 Extreme is designed for a 60cc engine for towing, although mine flies ok with a DLE 40cc flat twin, it won't be enough for towing, where a 60cc would. a Flat twin would be ideal, but for running the radial in, then this is a good airframe to do that. Quote Link to comment Share on other sites More sharing options...
Richard Wills 2 Posted April 15, 2017 Share Posted April 15, 2017 My brother has a Moki 210 on his, always wondered what it would be like with a big radial stuck out the front.....now i know. good job! Quote Link to comment Share on other sites More sharing options...
Dwain Dibley. Posted April 15, 2017 Share Posted April 15, 2017 That will look and most definitely sound awesome IMHO.D.D. Quote Link to comment Share on other sites More sharing options...
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