stuey Posted December 13, 2012 Share Posted December 13, 2012 Hi chaps, after an opinion. I am trying to come up with a Xmas pressie from my wife (a contribution at least!!) and I am pondering a Seagull Sea Fury or the Hangar 9 P-47. The Sea Fury is my preference, but totting up whats needed is pushing it a bit. The first being the engine. I know a 4 stroke would be better, but I have read that a .91 may not be man enough, and as far as the better value ones go you have a choice of that or a .120 at a fair bit more. I could get a .91 2 stroke with an in cowl silencer for less than the .91fs, but is that sacrelidge? My 2 Kyosho 50 sized models have 4 strokes, so I can make a comparison. After all a lot of bigger warbirds fly with 2 stroke petrols, they dont sound like a 4 stroke do they? The other thing I was pondering was does it really need flaps? That could save 2 servos, and I see no reason why the elevator could not be done with 1 servo of suitable torque instead of two. That would also save a bit of weight and therefore wing loading. Am I barking up the wrong tree? Quote Link to comment Share on other sites More sharing options...
Dave Bran Posted December 13, 2012 Share Posted December 13, 2012 Don't worry about the noise pitch, go 2 Stroke, a four stroke is just an engine working half as well........... You DO need flaps on it!! Quote Link to comment Share on other sites More sharing options...
Simon Chambers Posted December 13, 2012 Share Posted December 13, 2012 Let's not kid ourselves, a 4-stroke single cylinder glow engine is going to sound no more like a fullsize warbird engine than a 2-stroke single cylinder engine! However a 4-stroke does sound kinder to the ear than a 2-stroke imo. Quote Link to comment Share on other sites More sharing options...
John Hickson Posted December 14, 2012 Share Posted December 14, 2012 After having my first 4S for my seagull seafire its 4's every time from now on for me Edited By John Hickson on 14/12/2012 08:31:22 Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted December 14, 2012 Share Posted December 14, 2012 It is a very light model, so you may not need as much power as you think. Of course you could really upset everybody and go electric..... Cheers Danny Quote Link to comment Share on other sites More sharing options...
GrahamC Posted December 14, 2012 Share Posted December 14, 2012 What about a petrol? They are getting very cheap. 20cc's can be had for just over £100 and the reviews seem to be pretty good. Also check out Inwood's prices on SC fourstrokes. They can be very reasonable. Quote Link to comment Share on other sites More sharing options...
stu knowles Posted December 14, 2012 Share Posted December 14, 2012 Sorry, I have never understood the assertion that somehow four stoke motors are more 'scale' I've used three or four but currently own none. Even my Puppeteer has a two stroke, large prop & good silencer, sounds every bit as good and to me, far less expense and hassle. Have to agree with previous post, soemthing like a zenoah 20, plenty of power, easy starting and clean CLEAN!! stu k Quote Link to comment Share on other sites More sharing options...
bouncebounce crunch Posted December 14, 2012 Share Posted December 14, 2012 I am too busy trying to fly rather than listening for a g, d-minor or f-major note, power equals flight, bolt on what ever it is and get up there. Edited By bouncebouncecrunch on 14/12/2012 10:16:58 Quote Link to comment Share on other sites More sharing options...
stuey Posted December 14, 2012 Author Share Posted December 14, 2012 Thanks for the feedback chaps. To me a real sea fury has a slightly higher pitch sound to a merlin, so I dont think a 2 stroke is that far away. I am an electric/IC man so I'm not against the idea of that choice. Danny, do you think the flaps are essential? Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted December 14, 2012 Share Posted December 14, 2012 Hi Stuey, I found that full flaps caused the model to be a bit unstable, but at 45 degrees or half flap in my case they worked very well, with a handful of revs right down to the deck. Seeing this thread has reminded me how much I enjoyed mine, must get it flying again for next year. Cheers Danny Quote Link to comment Share on other sites More sharing options...
stuey Posted December 14, 2012 Author Share Posted December 14, 2012 Thanks for that Danny, at least this thread has reminded you! I just wish I could make me mind up! Quote Link to comment Share on other sites More sharing options...
stuey Posted December 14, 2012 Author Share Posted December 14, 2012 Does anyone happen to know if a .91/108 2 stroke would fit inside the cowl sideways, allowing for a pitts type silencer to exit through the bottom? Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted December 14, 2012 Share Posted December 14, 2012 LOL its a cracker of an aircraft, and when i got mine Leeds Model Shop was doing them for £99 so a real bargain. Will this tempt you??? This was a very early flight before i got used to it, and nearly lost it by relaxing the up elevator on takeoff. The piano wire rods for the retracts also needed doubling up as it flexed and failed to lock the wheels up. Cheers Danny Quote Link to comment Share on other sites More sharing options...
Prop Nut Posted December 14, 2012 Share Posted December 14, 2012 If you were to opt for the Hangar 9 P-47, it uses a single elevator servo and doesn't have, or need, flaps. Mine has more than enough power on the OS .91FS that cost me £80 second-hand, and it has quickly become a favourite. I intend to go petrol for my next warbird, given the prices now, but wouldn't rule out a 2-stroke. Do whatever you need to get it into the air! Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted December 14, 2012 Share Posted December 14, 2012 Just to chuck another thought into the mix how about the Super Tigre G2300? £145 from Steve Webb.....I know Lee Smalley loves his ST in his big (63" Yak.... I probably should point out that I don't have an ST G2300 OR a Sea Fury so my opinions are totally untainted by facts... Quote Link to comment Share on other sites More sharing options...
Turbycat Posted December 14, 2012 Share Posted December 14, 2012 Now there's a thought. Looking for a new home for my St 2300 since the demise of my Yak a couple of months ago. The St isn't too noisey either. Andy Quote Link to comment Share on other sites More sharing options...
Lee Smalley Posted December 14, 2012 Share Posted December 14, 2012 G2300 is a great engine not quite as clean as a petrol but just as easy to start, cheaper and runs on 5% or no nitro.... man what en engine and really quite too!! Quote Link to comment Share on other sites More sharing options...
stuey Posted December 18, 2012 Author Share Posted December 18, 2012 I eventually decided today and ordered a Sea Fury. This was helped by the fact that the P-47 is out of stock where I tried! Not decided on the engine front yet, and I am hoping to incorporate a few mods to add a bit more scale detail such as possibly shortening the cowl a bit. Thanks for the posts so far Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted December 18, 2012 Share Posted December 18, 2012 Stuey, you have made a good choice. I cut a big chunk off the rear of the cowl off and slid it back to shorten the nose just as you are planning. The cowl is parallel so its quite a simple task. However if you are going ic you may need to add weight up front. With electric it wasn't an issue as the cells are right up the front Cheers Danny Quote Link to comment Share on other sites More sharing options...
Concorde Speedbird Posted December 18, 2012 Share Posted December 18, 2012 A nice bit of engine will solve c of g! Nice looking planes, you should enjoy yours- good luck! CS Quote Link to comment Share on other sites More sharing options...
stuey Posted December 18, 2012 Author Share Posted December 18, 2012 How much did you guys shorten the cowl by? Would not be that hard to strap the engine on and see how the balance is affected before commiting to any cuts. Any other worthwhile mods that are not too taxing? The fin should have a radius where it joins the fuselage for a start. Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted December 18, 2012 Share Posted December 18, 2012 I don't think you could ever say the 18 cylinder sleeve valve Centaurus ever sounded anything like a Merlin which was noted for the 'crackle' in its exhaust note due to its relatively aggressive valve timing. The sleeve valve ports on the Centaurus closed relatively slowly so the note was much deeper and a lot quieter, most of the noise coming from the prop. Unless you go for a big multi cylinder, electric is probably nearer the mark! Quote Link to comment Share on other sites More sharing options...
stuey Posted December 18, 2012 Author Share Posted December 18, 2012 You may have a good point on the electric thing there. I have not had a chance to see a decent sized electric model fly with a big prop, only a few vids online. I dare say I would have a job convincing some of my club mates!! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted December 18, 2012 Share Posted December 18, 2012 Hi Stuey, I have just waded through the old thread and it seems Chris and I took three inches off the cowl. But I had to up the motor size for propping reasons which helped with the c of g, CS I know you love your ICs but the significant mass of an ic engine is inches back from the the prop backplate, where as an electric motors mass is right at the back of the spinner. You do have to bear this in mind when shortening a models nose. I shortened a Pupeteer by about 4" and you couldn't have done that with an ic without lead and mounting the cylinder inside the fus Cheers Danny Quote Link to comment Share on other sites More sharing options...
Concorde Speedbird Posted December 19, 2012 Share Posted December 19, 2012 Even simpler, put one of these right at the front! You could still move the rx battery forwards, fuel proofing would help a tad and a big engine that you could tame down with a large prop, which would also be scale! CS Quote Link to comment Share on other sites More sharing options...
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