B M E 50 weight + cost +smoothness
02-21-2002, 01:09 PM
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B M E 50 weight + cost +smoothness
Any one have info or know of a web page with spec. on the BME 50 ? Is this engine to heavy for a H-9 1/4 Cap ? Looking for engine weight and cost .
Thanks
Doug
Thanks
Doug
02-21-2002, 02:12 PM
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B M E 50 weight + cost +smoothness
http://www.bmeengine.com/
There is nothing on the 50 on there site. I called Don's hobbies and got some info from them.
There is nothing on the 50 on there site. I called Don's hobbies and got some info from them.
02-21-2002, 05:06 PM
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B M E 50 weight + cost +smoothness
I paid $525 for mine... 
Then $50 for the BME muffler...then realized it would be too loud then bought the J+A Peacekeeper for $100...
Then $50 for the BME muffler...then realized it would be too loud then bought the J+A Peacekeeper for $100...
02-21-2002, 05:07 PM
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BME 50
Hello finnz
Thank you for engine info .
Any one put one of these engines on a H-9 Cap 1/4 ? Probably to heavy for this size plane . I would like to try a gasser on this plane , just not sure which one yet .
Thanks
Doug
Thank you for engine info .
Any one put one of these engines on a H-9 Cap 1/4 ? Probably to heavy for this size plane . I would like to try a gasser on this plane , just not sure which one yet .
Thanks
Doug
02-21-2002, 06:21 PM
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BME 50 weight
Hi Stomper,
The "latest" 50 being shipped weighs 3lbs 14.5 - 15.5oz(depending on your mount) with J&A muffler, mount and ignition(no battery).
The earlier 50's weighed about 3 oz more.
Bill
The "latest" 50 being shipped weighs 3lbs 14.5 - 15.5oz(depending on your mount) with J&A muffler, mount and ignition(no battery).
The earlier 50's weighed about 3 oz more.
Bill
02-21-2002, 10:42 PM
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Difference in weight
I did know, but I don't remember for sure. I think it was a difference in the prop hub, or something like that. I'll see if I can find out for sure.
Bill
Bill
02-21-2002, 11:09 PM
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B M E 50 weight + cost +smoothness
Kieth ,BME, started machining the prop hub to be a bit lighter as well as using lighter harder like the nuts and bolts that 3W and DA use.
This engine would be awesome on the 1/4 scale cap. I have the BME44 on it and MAN is it smoooooooth. The 50 weighs about the same as the ZDZ 40 which other have used on this plane.
Good luck
Jeff
This engine would be awesome on the 1/4 scale cap. I have the BME44 on it and MAN is it smoooooooth. The 50 weighs about the same as the ZDZ 40 which other have used on this plane.
Good luck
Jeff
02-21-2002, 11:13 PM
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BME 44's smooth??
Hi Jeff,
My BME 44 wasn't very smooth, at least no where nearly as smooth as my Taurus 2.6, but I've heard the 50's are a bunch smoother than the 44's.
Bill
My BME 44 wasn't very smooth, at least no where nearly as smooth as my Taurus 2.6, but I've heard the 50's are a bunch smoother than the 44's.
Bill
02-22-2002, 02:28 AM
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B M E 50 weight + cost +smoothness
My friend has a Ford Taurus with the 3.8,and man oh man,
that engine is smooth.............But it does weigh more than 3lbs.
I thought this thread was about B.M.E 50's,so I am
sorry I got alittle off subject.....
that engine is smooth.............But it does weigh more than 3lbs.
I thought this thread was about B.M.E 50's,so I am
sorry I got alittle off subject.....
02-22-2002, 03:26 AM
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Knife-edge
Well, I can see you're going to be a valuable new member of this site that's going to add a lot of constructive input. I'm guessing this type of post is going to be typical for you and probably why you don't publish your e-mail address.
I apologize for publishing this publicly.
Bill
I apologize for publishing this publicly.
Bill
02-22-2002, 03:33 AM
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B M E 50 weight + cost +smoothness
I called BME today and they told me the BME 50 weighs 2lbs 10oz. My Taurus weighs 3500lbs. Hay you Mr. Knife-edge no more jokes this is supposed to be informative, not some comedy act. Stick to the subject PLEASE!!!!!!!!!!!
02-22-2002, 04:06 AM
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B M E 50 weight + cost +smoothness
Just got this info from BME.
Weight 3.0 lbs bare
Dimensions are almost exactly the same as the 44cc and uses the same muffler.
Thrust is best with a 21x8 or 22x8 menz standard at 27lbs
Got my eye on this one
Weight 3.0 lbs bare
Dimensions are almost exactly the same as the 44cc and uses the same muffler.
Thrust is best with a 21x8 or 22x8 menz standard at 27lbs
Got my eye on this one
02-22-2002, 04:14 AM
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B M E 50 weight + cost +smoothness
Thanks Magnum for the info. My best friend is getting his tomorrow I look forward to looking at it. I will take my handy dandy scale and weigh that bad boy.... 27lbs.......That Rocks...
02-22-2002, 04:41 AM
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WARNING: this is not directly about the BME 50
Ok guys, let's start a little legitimate controversy. Thrust? What exactly does 27lbs mean? How was it measured? With a thrust calculator, or does the BME have a thrust measurement system they use. If so, then this figure has value only when comparing it to other values BME publishes for their engines, but not for comparative purposes with other engines. RCS/ZDZ quotes thrust and they admit they're using a thrust calculator for the numbers they publish. If taken as an absolute to compared against another engine, this again is pretty meaningless.
The only measurement that can be useful for comparing different motors on these forums is RPM numbers for the same prop(brand, type and size) on different motors, and hopefully some conditions will be known, like altitude, temperature and humidity to help judge the relative value of these numbers.
The only measurement that can be useful for comparing different motors on these forums is RPM numbers for the same prop(brand, type and size) on different motors, and hopefully some conditions will be known, like altitude, temperature and humidity to help judge the relative value of these numbers.
02-22-2002, 05:00 AM
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B M E 50 weight + cost +smoothness
27lbs..... Awesome....... That is more than enough to Hover my H9 Edge. And it is so light it will float like a CUB. I AM SOLD.. Thanks guys. I am going to order mine tomorrow.
02-22-2002, 05:17 AM
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How to measure thrust?
Chris,
One of the best ways that is easy is just attach a digital fish scale to the back of your plane and have at it(make sure no one is standing in front of it). With this method you'll get a fairly close "real" thrust reading. You'll most likely find it is significantly less than what the thrust calculator tells you what it is going to be.
If you want "accurate" thrust measurements then you probably need a test stand mounted on ball bearings and hooked to a very accurate measuring device, though I don't think this is necessary for good comparisons.
The only point I'm trying to make is that a thrust number by itself doesn't mean a lot for comparitive purposes, unless all thrust numbers you're comparing were derived from the same method.
As an example, from the RPM numbers my Taurus 2.6 is turning on a 22X8 Zinger Pro(7200), the thrust calculator tells me I have over 34lbs of static thrust. There's no way this is a "true" thrust value.
Bill
One of the best ways that is easy is just attach a digital fish scale to the back of your plane and have at it(make sure no one is standing in front of it). With this method you'll get a fairly close "real" thrust reading. You'll most likely find it is significantly less than what the thrust calculator tells you what it is going to be.
If you want "accurate" thrust measurements then you probably need a test stand mounted on ball bearings and hooked to a very accurate measuring device, though I don't think this is necessary for good comparisons.
The only point I'm trying to make is that a thrust number by itself doesn't mean a lot for comparitive purposes, unless all thrust numbers you're comparing were derived from the same method.
As an example, from the RPM numbers my Taurus 2.6 is turning on a 22X8 Zinger Pro(7200), the thrust calculator tells me I have over 34lbs of static thrust. There's no way this is a "true" thrust value.
Bill
02-22-2002, 10:03 PM
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B M E 50 weight + cost +smoothness
Bill,
Wouldn't it be good if there could be a basic test the average person could do like you are describing, and then have that info in a website databasefor all the different engines. Now that would be helpful.
I agree with you 100%, I only use the thrust as a general idea on the engine.
BTW.. Still considering taking your suggestion on the BME
Wouldn't it be good if there could be a basic test the average person could do like you are describing, and then have that info in a website databasefor all the different engines. Now that would be helpful.
I agree with you 100%, I only use the thrust as a general idea on the engine.
BTW.. Still considering taking your suggestion on the BME