John Laverick Posted June 11, 2012 Share Posted June 11, 2012 I've an old ic Mosquito which I've converted to electric and I'm a bit worried about the watts per pound, she comes in at 11 lbs and each motor is pulling 490 watts, I'm not interested in flinging her round, would 980watts be enough for a sedate flight? Thanks John Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted June 11, 2012 Share Posted June 11, 2012 At less than 100 watts per pound, I suspect it may be marginal. I have a 7lb 5oz Mossie that uses two motors totalling about 1000 watts, for 130 watts per pound. My experience is that you may need to fly a little faster than "sedately" in order to avoid tip stalls with the tapered wings (guess how I know!). But a lot depends on the model, such as whether it's true scale or dimensions have been modified slightly to make for more reliable flight. If you post more-specific details of your model, maybe someone will be able to chip in from first-hand experience. Quote Link to comment Share on other sites More sharing options...
John Laverick Posted June 12, 2012 Author Share Posted June 12, 2012 Thanks Allan, I suspected as much, the plane is very scale like, with a 72 inch wingspan and very pointy tips!! I bought it 12 years ago but I threw the plans out after building and can't remember the brand. I do know it no longer exists, It is of a foam and ply covering construction with plastic nacelles, I'll have a mess around with different prop sizes to see if I can get anymore watts out of it. I'll post a photo and someone might be able to recognize the maker John Quote Link to comment Share on other sites More sharing options...
John Laverick Posted June 13, 2012 Author Share Posted June 13, 2012 Messed around with props and the amp meter and I managed to get 620 watts pulling 54 amps with a 14-7 prop for each motor with nothing getting too warm, so I reckon that's 111 watts per pound so I'm gonna give it a go John Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted June 13, 2012 Share Posted June 13, 2012 Sounds good Just be careful to keep the speed up to avoid the stall. Quote Link to comment Share on other sites More sharing options...
John Laverick Posted June 15, 2012 Author Share Posted June 15, 2012 Just ran it up with a 12 - 8 three blader and got 760 watts at 61 amps, however in my quest to get more out of it I didn't consider the lipo's I was using and just puffed a 4s3 3000 20c up whoops, better get some new batteries that can handle the job or stick with two blades Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.