alec james Posted July 30, 2018 Share Posted July 30, 2018 Thx iqon for reply but as you can guess I have tried every bigger prop known to man (just about) including 3 blades. Big props tend to overload the motors as well which is not good although it keeps the revs down. As for canisters I have bought two different makes and neither of them can get below 82dB.Resting from the front is the worse, in fact my home made canisters are much quieter ( on number 6 at the moment) . Quote Link to comment Share on other sites More sharing options...
alex nicol Posted July 30, 2018 Author Share Posted July 30, 2018 Alex, Slightly off topic, what was the best performing 3 blade you tried. I'm struggling for ground clearance, I'm thinking of a 17x8 Quote Link to comment Share on other sites More sharing options...
cymaz Posted July 30, 2018 Share Posted July 30, 2018 The exhausts on most 2t petrols are a joke. The thing that really gets my goat is prop tips going super sonic...just me I guess. Though, I could listen to the Galloping Ghost all day. Quote Link to comment Share on other sites More sharing options...
alec james Posted July 30, 2018 Share Posted July 30, 2018 alex nicol. Prop was a 17x10 Master, bit of a bodge in the hub for the bolts as the hub is not really designed for that type of fitting. Still to noisy though on a bought canister. Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 30, 2018 Share Posted July 30, 2018 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
flight1 Posted July 30, 2018 Share Posted July 30, 2018 the thing is the 'silencers' that come with these 2 stroke petrol engines just don't have enough volume to be effective silencers, just look at a 50cc moped can much lager. you could use pesiffic Acousta-Fil Exhaust Wadding (exsample) which is desined to do the job not like wire wool,, but it would need replacing after some time if lot of oil gets blasted out the exhaust. 4 stroke petrol with a small can is the answer but cost is always a issue for most like me but I have recently tried a Torq-pro 70cc and got it to 84db with out much issue. Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 30, 2018 Share Posted July 30, 2018 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
woody Posted July 30, 2018 Share Posted July 30, 2018 If you are unable to install a can, then the best Pitt’s muffler for it is the Evolution 33 muffler. Quote Link to comment Share on other sites More sharing options...
Rich too Posted July 31, 2018 Share Posted July 31, 2018 As has been said it is not unique to DLE, all two strokes are noisy. A decent prop, can , and intake into the fuselage (you can make a box and fill it with filtering material) will quieten them down a lot - the intake is often forgotten. Quote Link to comment Share on other sites More sharing options...
cymaz Posted June 21, 2020 Share Posted June 21, 2020 For reference, I had my DLE 30 sound tested at the club yesterday. Fitted to a Wot 4XL, 30:1 fuel, Aerostar wooden prop. The only modification done was slip on some high temp automotive silicone tube over the exhaust outlet, to extend the stub length by 3”. Measurements taken at 7m, WOT, on both sides of the engine. Highest reading recoded...a pass is @ 84dB and under. Model held at waist height and up wind. Aerostar 20x6... 85, fail Aerostar 19x8....83, pass Edited By cymaz on 21/06/2020 06:01:04 Edited By cymaz on 21/06/2020 06:02:00 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted June 21, 2020 Share Posted June 21, 2020 Krumshied silencers work very well but do cost a bit . Stuart McKay of McKay engines(Moki) sells them . Quote Link to comment Share on other sites More sharing options...
Ultymate Posted June 21, 2020 Share Posted June 21, 2020 The trouble with most if not all 30/35 cc models are not designed to cater for the fitment of a canister the so called standard silencers that are supplied are little more than gas deflectors and the Pitts style ones are little if any better Quote Link to comment Share on other sites More sharing options...
cymaz Posted June 21, 2020 Share Posted June 21, 2020 Agreed, exhausts are next to rubbish. I was very surprised that the DLE 30 passed, still, a pass is a pass Quote Link to comment Share on other sites More sharing options...
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