Den Moran Posted November 19, 2021 Share Posted November 19, 2021 Hi, everyone! I have a 70mm EDF Dynam Meteor, which is fine taking off on tarmac, but refuses on grass. I get the feeling that a little more power would do the trick, and am looking to use a more powerful motor. At present it is 4s, and has a 60amp esc, with a Detrum BM2827A-KV2600. Any suggestions, please? Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted November 19, 2021 Share Posted November 19, 2021 Oddly enough I found exactly the same. Settled for a 70mm 12 blade Inrunner from Motion RC and 6s 3300 60c lipo. The stock Detrum is gutless and noisy. Goes a bit better! Quote Link to comment Share on other sites More sharing options...
Shaun Walsh Posted November 19, 2021 Share Posted November 19, 2021 https://www.4-max.co.uk/edf-pf-70mm.html Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted November 19, 2021 Share Posted November 19, 2021 https://www.motionrc.eu/collections/edf-power-systems/products/freewing-70mm-edf-power-system-w-2957-2210kv-inrunner-motor-e7218#qa-tab Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted November 19, 2021 Share Posted November 19, 2021 Den I would not recommend just changing the motor. You may use more power but you won't necessarily get a proportional increase in thrust. Many of the more powerful units have the motor and fan dynamically balanced at the factory. The difference is remarkable. It will come down to how much you want to spend on achieving a grass take off performance. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted November 19, 2021 Share Posted November 19, 2021 (edited) I use 5s 3300 batteries in mine (stock esc and motor), no problem on grass and transforms the ‘plane. Edited November 19, 2021 by Ron Gray Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted November 19, 2021 Share Posted November 19, 2021 44 minutes ago, Simon Chaddock said: Den I would not recommend just changing the motor. You may use more power but you won't necessarily get a proportional increase in thrust. Many of the more powerful units have the motor and fan dynamically balanced at the factory. The difference is remarkable. It will come down to how much you want to spend on achieving a grass take off performance. I changed the motor and esc, and it made a considerable difference. The fan came balanced perfectly and is whisper quiet. Speed flea clocked it 120mph from straight and level. Its a Habu copy and flies on rails!. 1 Quote Link to comment Share on other sites More sharing options...
Den Moran Posted November 20, 2021 Author Share Posted November 20, 2021 I see what you mean about expense! I will probably go for a 6s version, though, although I have a 5s battery here ( Ron), and may try that first - it's just a very little extra power that's needed! Thanks everyone, will update this after I get a chance to fly it ( G knows when!) Den, Abertawe. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted November 20, 2021 Share Posted November 20, 2021 You will be surprised at how much extra performance you get with the 5s, Den, so much so that I binned my plans for an edf upgrade and have flown it like that for the last 4 years. Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted November 20, 2021 Share Posted November 20, 2021 10 minutes ago, Den Moran said: I see what you mean about expense! I will probably go for a 6s version, though, although I have a 5s battery here ( Ron), and may try that first - it's just a very little extra power that's needed! Thanks everyone, will update this after I get a chance to fly it ( G knows when!) Den, Abertawe. Den - since your model flies well off tarmac, is there any chance you could try with just slightly larger wheels? Sounds like an upgrade in power is probably the way to go, but as a very low cost test slightly larger wheels might get you in the air, at which point you said the model flies well. Quote Link to comment Share on other sites More sharing options...
Ron Gray Posted November 20, 2021 Share Posted November 20, 2021 Wheel size somewhat governed by wheel well size (retracts). Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted November 20, 2021 Share Posted November 20, 2021 Indeed they are - might it be possible to try it out with larger wheels, without retracting the gear? It sounds like your option of using 5s1p 3300mah pack will produce success, without a large additional expense. ? Quote Link to comment Share on other sites More sharing options...
SIMON CRAGG Posted November 20, 2021 Share Posted November 20, 2021 Luckily we have got a tarmac runway, so with 6s its off in feet. Due to the small / weak u/c, I always belly land it on grass. Despite being a bit of a missile, it will slow down nicely and just slide along the grass. Quote Link to comment Share on other sites More sharing options...
Den Moran Posted November 21, 2021 Author Share Posted November 21, 2021 I'd already planned a larger nosewheel- about 1cm dia larger - should do the trick - I tested the 5s , really going for it now, it tried to open my bedroom durtains! Thanks again, all, Den, Abertawe. 1 Quote Link to comment Share on other sites More sharing options...
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