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Metalworking Deeds of the Day
I made a replacement shaft for an electric model airplane motor. My wife
bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! -- Tim Wescott Wescott Design Services http://www.wescottdesign.com |
Metalworking Deeds of the Day
Tim Wescott wrote:
The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! Can I get a Triple Burger on a Kaiser roll, or would it be cheaper to get the Big Classic Double with an extra beef patty? -- |
Metalworking Deeds of the Day
On Tue, 14 Jul 2015 19:49:53 -0500, Tim Wescott
wrote: I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! So, at $15.00 an hour, minimum wage, you only lost six dollars and fifty cents :-) -- cheers, John B. |
Metalworking Deeds of the Day
On Tuesday, July 14, 2015 at 8:49:55 PM UTC-4, Tim Wescott wrote:
I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Hope you at least made a second one while you were at it as a spare. G'luck PaulS |
Metalworking Deeds of the Day
On 7/14/2015 7:49 PM, Tim Wescott wrote:
I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If I were doing this, it takes only a bit more time to make 2 or 3 for the next accidents. David |
Metalworking Deeds of the Day
On Tue, 14 Jul 2015 19:49:53 -0500, Tim Wescott
wrote: The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If you were to drive off to the shop to buy a new one, you would probably have spent just as much time. And then there's the fuel cost on top. -- RoRo |
Metalworking Deeds of the Day
On Wed, 15 Jul 2015 07:50:48 -0500, David R. Birch wrote:
On 7/14/2015 7:49 PM, Tim Wescott wrote: I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If I were doing this, it takes only a bit more time to make 2 or 3 for the next accidents. Most of the time was spent making the tool, and that's done. We bent another one today, so I have my evening's entertainment laid out. (She's learning control line, where basically you don't crash at all or you land on the propeller. Infernal combustion engines tend to have much stouter crankshafts than 'lectric, which is why those little Cox plastic planes ever survived long enough for a second attempt). -- www.wescottdesign.com |
Metalworking Deeds of the Day
Tim Wescott wrote:
The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! Were it in ThisPartOfRightPondia and Euro instead of Dollar, you'd even have earned the recently established mandatory minimum salary. -- "I'm a doctor, not a mechanic." Dr Leonard McCoy "I'm a mechanic, not a doctor." Volker Borchert |
Metalworking Deeds of the Day
On Wed, 15 Jul 2015 15:40:15 -0500, Tim Wescott
wrote: On Wed, 15 Jul 2015 07:50:48 -0500, David R. Birch wrote: On 7/14/2015 7:49 PM, Tim Wescott wrote: I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If I were doing this, it takes only a bit more time to make 2 or 3 for the next accidents. Most of the time was spent making the tool, and that's done. We bent another one today, so I have my evening's entertainment laid out. (She's learning control line, where basically you don't crash at all or you land on the propeller. Infernal combustion engines tend to have much stouter crankshafts than 'lectric, which is why those little Cox plastic planes ever survived long enough for a second attempt). My solution to teaching people to fly control-line planes was to teach tem on 1/2-A planes in tall grass. It saved props and motors. g -- Ed Huntress |
Metalworking Deeds of the Day
On Wed, 15 Jul 2015 23:38:43 -0400, Ed Huntress wrote:
On Wed, 15 Jul 2015 15:40:15 -0500, Tim Wescott wrote: On Wed, 15 Jul 2015 07:50:48 -0500, David R. Birch wrote: On 7/14/2015 7:49 PM, Tim Wescott wrote: I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If I were doing this, it takes only a bit more time to make 2 or 3 for the next accidents. Most of the time was spent making the tool, and that's done. We bent another one today, so I have my evening's entertainment laid out. (She's learning control line, where basically you don't crash at all or you land on the propeller. Infernal combustion engines tend to have much stouter crankshafts than 'lectric, which is why those little Cox plastic planes ever survived long enough for a second attempt). My solution to teaching people to fly control-line planes was to teach tem on 1/2-A planes in tall grass. It saved props and motors. g I'm working on an electric and foam alternative to that. Rev 2 will have the motor behind the wing, pushing, and the battery in the nose. Boring straight into the ground may mangle the fuse (we don't have tall grass), but at least it won't damage the motor. -- www.wescottdesign.com |
Metalworking Deeds of the Day
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Metalworking Deeds of the Day
On Thu, 16 Jul 2015 00:35:07 -0500, Tim Wescott
wrote: On Wed, 15 Jul 2015 23:38:43 -0400, Ed Huntress wrote: On Wed, 15 Jul 2015 15:40:15 -0500, Tim Wescott wrote: On Wed, 15 Jul 2015 07:50:48 -0500, David R. Birch wrote: On 7/14/2015 7:49 PM, Tim Wescott wrote: I made a replacement shaft for an electric model airplane motor. My wife bent the old one as part of the learning process (she's learning control line. You cannot fly ten dumb thumbs high with a control line plane -- you're always one or two mistakes away from disaster). So, during the better part of an hour's worth of work, I cut a 3mm rod to length, made a 20-mil wide groove cutter, cut a groove, pressed out the old shaft, and pressed in the new one. Making the cutter on my bench grinder took most of the time. The best part is -- I saved $8.50! $7.40 for the motor, and $1.10 for a replacement shaft! For just an hour's work! If I were doing this, it takes only a bit more time to make 2 or 3 for the next accidents. Most of the time was spent making the tool, and that's done. We bent another one today, so I have my evening's entertainment laid out. (She's learning control line, where basically you don't crash at all or you land on the propeller. Infernal combustion engines tend to have much stouter crankshafts than 'lectric, which is why those little Cox plastic planes ever survived long enough for a second attempt). My solution to teaching people to fly control-line planes was to teach tem on 1/2-A planes in tall grass. It saved props and motors. g I'm working on an electric and foam alternative to that. Rev 2 will have the motor behind the wing, pushing, and the battery in the nose. Boring straight into the ground may mangle the fuse (we don't have tall grass), but at least it won't damage the motor. Junior's first attempt went ammazingly well in the park across the street until, in an attempt to avoid the tree on our side of the street, he did an accurate vertical hit on the top of a street light! --- Gerry :-)} London,Canada |
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