1/2A P-51 conversion. Will this work????
10-25-2007 | 11:48 PM
#1
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From: AS, AUSTRALIA
1/2A P-51 conversion. Will this work????
Hi all.
I've been doing some research into this conversion, a .074 to electric, and have come up with this result using a motor etc that I already have from my Ultrafly 300S.
The motor that came with the 300 is an A/30/29 which according to their website is good to 900g (31oz), after which I assume it would be like trying to fly a paper weight with a rubber band[&o]
Again according to the Ultrafly site it states the 300S flying weight is 624g (22oz), and allowing for the battery (2200 3S LiPo), rx, servo's etc it should nudge it up to close to 30 I assume (I don't have a scale to weigh it[
])
The 300S screams along with this setup.
Now the Mustang kit I'm going to build has a finished weight of 22oz also, plus engine, fuel load, servos etc, the weight of which would be similar to the weight of a battery and brushless, servo's etc.
Would I be correct in assuming the A/30/29 would be ok to run the Mustang with??
I've read SOOOOOOOO many conflicting reports about X power rating for X engine replacement that I'm almost over wanting to switch to electrics[:@]
Any avice would be appreciated.
Thanks in advance
Sean
I've been doing some research into this conversion, a .074 to electric, and have come up with this result using a motor etc that I already have from my Ultrafly 300S.
The motor that came with the 300 is an A/30/29 which according to their website is good to 900g (31oz), after which I assume it would be like trying to fly a paper weight with a rubber band[&o]
Again according to the Ultrafly site it states the 300S flying weight is 624g (22oz), and allowing for the battery (2200 3S LiPo), rx, servo's etc it should nudge it up to close to 30 I assume (I don't have a scale to weigh it[
])The 300S screams along with this setup.
Now the Mustang kit I'm going to build has a finished weight of 22oz also, plus engine, fuel load, servos etc, the weight of which would be similar to the weight of a battery and brushless, servo's etc.
Would I be correct in assuming the A/30/29 would be ok to run the Mustang with??
I've read SOOOOOOOO many conflicting reports about X power rating for X engine replacement that I'm almost over wanting to switch to electrics[:@]
Any avice would be appreciated.
Thanks in advance
Sean
10-26-2007 | 02:56 PM
#2
Senior Member
RE: 1/2A P-51 conversion. Will this work????
Sean,
It is often easier to follow a few simple rules or an example like you have found than it is to read many opinions on what is the best way to go.
The example you found on the Ultrafly A/30/29 sounds reasonable. Another suggestion is to look for a review of a similar size plane and see how it was powered. A quick e-mail to the vendor you plan to buy the motor from is a good idea if you are not confident in your choice.
Use the watts per pound rule of thumb either for the motor power class selection or as a sanity check. Your model weighs 22oz or 1.4lbs. A P-51 should have at least 100 watts per pound of power to fly aerobatics. This means that your motor should be able to handle 100 * 1.4 or 140 watts. There are many, many, 150 watt power systems on the market for you to choose from.
Good luck!
It is often easier to follow a few simple rules or an example like you have found than it is to read many opinions on what is the best way to go.
The example you found on the Ultrafly A/30/29 sounds reasonable. Another suggestion is to look for a review of a similar size plane and see how it was powered. A quick e-mail to the vendor you plan to buy the motor from is a good idea if you are not confident in your choice.
Use the watts per pound rule of thumb either for the motor power class selection or as a sanity check. Your model weighs 22oz or 1.4lbs. A P-51 should have at least 100 watts per pound of power to fly aerobatics. This means that your motor should be able to handle 100 * 1.4 or 140 watts. There are many, many, 150 watt power systems on the market for you to choose from.
Good luck!
10-26-2007 | 07:25 PM
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RE: 1/2A P-51 conversion. Will this work????
Excellent.
The watts/pound theory would work in this case as Ultrafly class their motor at 160 watts, not heaps of power, but something to work with till I get used to the electric idea.
Thanks
Sean
The watts/pound theory would work in this case as Ultrafly class their motor at 160 watts, not heaps of power, but something to work with till I get used to the electric idea.
Thanks
Sean
