parrothead
Squadron leader
Blackbeard's playground
Posts: 206
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Post by parrothead on Feb 24, 2011 3:16:49 GMT 1
Note to self: DO NOT TAMPER WITH THROTTLE SERVO REVERSAL SWITCH WITHOUT CHECKING THROTTLE STICK POSITION. CONFIRM ALL BODY PARTS ARE CLEAR OF PROP. I think I can get by without stitches and the med center, just keep the band-aids pulled tight.  |
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Post by flydiver on Feb 24, 2011 4:51:42 GMT 1
Scary! Huh?
I've got a wooden shelf downstairs with chunks out of it when I learned that lesson. I was seeing how throttle reversal worked with ESC programming.
Good policy to remove prop or secure plane before those kind of adjustments.
When I fire up a bench test of a new motor and prop I actually leave the room. After a couple props unloaded at a bazillion RPM I decided I couldn't actually predict that reliably nor likely dodge the Ginsu prop since I seldom even saw where it went.
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Post by Dillzio on Feb 24, 2011 13:17:20 GMT 1
there's a switch on your transmitters that reverses the throttle?
That's just asking for trouble. How often would anyone want to change it anyway, you either get used to one way or the other. Why put a switch on the transmitter for such a seldom used (and dangerous) function?
Is this on one of the fancy Spektrums?
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Post by john66 on Feb 24, 2011 13:34:17 GMT 1
there's a switch on your transmitters that reverses the throttle? That's just asking for trouble. How often would anyone want to change it anyway, you either get used to one way or the other. Why put a switch on the transmitter for such a seldom used (and dangerous) function? Is this on one of the fancy Spektrums? Its not a switch, its in the programming of the channels. Dont most brands have reversing on them? John |
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Post by ginginho on Feb 24, 2011 13:58:57 GMT 1
there's a switch on your transmitters that reverses the throttle? That's just asking for trouble. How often would anyone want to change it anyway, you either get used to one way or the other. Why put a switch on the transmitter for such a seldom used (and dangerous) function? Is this on one of the fancy Spektrums? Its not switch, its in the programming of the channels. Dont most brands have reversing on them? John Absolutely correct John, most quality brands do. Dillz will probably ask why (based on his previous uninformed post), and the reason being that some ESC are reversed when compared to others, and those that fly non-electric require the choice of how the throttle servo works or is placed within the airframe. Where multiple models are stored within the radio, you really would not want to have max throttle on one model being full forward, and max throttle on another as full back. That would be asking for trouble and as he put it, dangerous. AFAIK, all servos are reversable within the (decent) radio setup to allow for differing setups (e.g. aileron servos mounted on the wing or under or rudder servo mounted in the left or right side of the fuse). |
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Post by ginginho on Feb 24, 2011 14:18:19 GMT 1
Scary! Huh? I've got a wooden shelf downstairs with chunks out of it when I learned that lesson. I was seeing how throttle reversal worked with ESC programming. Good policy to remove prop or secure plane before those kind of adjustments. When I fire up a bench test of a new motor and prop I actually leave the room. After a couple props unloaded at a bazillion RPM I decided I couldn't actually predict that reliably nor likely dodge the Ginsu prop since I seldom even saw where it went. This reminds me of a time when I was helping my mate with his funjet at the field. The prop he had fitted was pulling too many amps so we tried a smaller one that I had. He thottled up to max while I held the airframe. Bang went the prop. After searching the area we found the two blades had been thrown between 20 and 30 feet from where we were. To give us an idea of how much momentum they were carrying when they let loose, we tried to hand throw the blades as hard as we could and as far as we could. This was a maximum of about six feet! We then realised how lucky I was that neither of the blades hit me when they were thrown off the hub. A hot knife through butter springs to mind.  |
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Post by john66 on Feb 24, 2011 14:29:11 GMT 1
Its not switch, its in the programming of the channels. Dont most brands have reversing on them? John Absolutely correct John, most quality brands do. Dillz will probably ask why (based on his previous uninformed post), and the reason being that some ESC are reversed when compared to others, and those that fly non-electric require the choice of how the throttle servo works or is placed within the airframe. Where multiple models are stored within the radio, you really would not want to have max throttle on one model being full forward, and max throttle on another as full back. That would be asking for trouble and as he put it, dangerous. AFAIK, all servos are reversable within the (decent) radio setup to allow for differing setups (e.g. aileron servos mounted on the wing or under or rudder servo mounted in the left or right side of the fuse). If I recall correctly, even my GC T6EAP had reversing on all channels? P'raps Toff could verify this? John |
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Post by john66 on Feb 24, 2011 14:33:47 GMT 1
This reminds me of a time when I was helping my mate with his funjet at the field. The prop he had fitted was pulling too many amps so we tried a smaller one that I had. He thottled up to max while I held the airframe. Bang went the prop. After searching the area we found the two blades had been thrown between 20 and 30 feet from where we were. To give us an idea of how much momentum they were carrying when they let loose, we tried to hand throw the blades as hard as we could and as far as we could. This was a maximum of about six feet! We then realised how lucky I was that neither of the blades hit me when they were thrown off the hub. A hot knife through butter springs to mind. Now that is SCARY! I might invest in a Kevlar gimp suit. John |
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Post by ginginho on Feb 24, 2011 15:04:10 GMT 1
This reminds me of a time when I was helping my mate with his funjet at the field. The prop he had fitted was pulling too many amps so we tried a smaller one that I had. He thottled up to max while I held the airframe. Bang went the prop. After searching the area we found the two blades had been thrown between 20 and 30 feet from where we were. To give us an idea of how much momentum they were carrying when they let loose, we tried to hand throw the blades as hard as we could and as far as we could. This was a maximum of about six feet! We then realised how lucky I was that neither of the blades hit me when they were thrown off the hub. A hot knife through butter springs to mind. Now that is SCARY! I might invest in a Kevlar gimp suit. John Just borrow Dillz's! He's got the gimp SC, so he must have a matching suit. |
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Post by john66 on Feb 24, 2011 15:08:15 GMT 1
Now that is SCARY! I might invest in a Kevlar gimp suit. John Just borrow Dillz's! He's got the gimp SC, so he must have a matching suit. Dill................. |
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Post by john66 on Feb 24, 2011 15:50:23 GMT 1
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parrothead
Squadron leader
Blackbeard's playground
Posts: 206
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Post by parrothead on Feb 25, 2011 2:12:07 GMT 1
Scary is right.
From zero RPMs to a "bazillion" (lol) in a nano second. Here's the really funny part, what direction do you think the plane was pointed in? That's right. I guess I through my hand up instinctively to cover my brain-dead head.
I had performed all binding and initial throttle control calibration with the prop off. But what the -bleep-. Not a mention of "ATTN: ALL HE!! WILL BREAK LOOSE ONCE THIS LIVE, EASY TO ACCESS SWITCH IS FLIPPED" or "SEVERAL VERSIONS TO CHOOSE FROM: BIND-N-CRY, PLUG-N-CURSE W/ VIRTUAL WWII REALITY MODE". Fortunately I chose the the ALMOST READY-TO-DIE VERSION.
I'm with Dill, why in the sam he!! would a function like that at least have a safety feature that kills the throttle power if the switch is flipped. The reversal function only activates once the TX is powered down and restarted. Darn XYZ company-at least protect yourselves in regards to liabilities.
Speaking of which, if anyone orders the gimp suit, toss in an extra one for me. With jock strap.
;D
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Post by Dillzio on Feb 25, 2011 8:11:43 GMT 1
John, Ging, If you get down off your pomey high horses I believe you'll see that Parrothead was indeed referring to a XYZ (or did he mean XYH?) transmitter which, as it happens, DOES have a switch on the transmitter for throttle reversal, as I (rightly!) suspected.
IN YOUR FACE! How does it feel boys, tell me. Do you like it like that? Come on, WHO'S YA DADDY!?!?
I'm afraid I'm not as misinformed as you might like to think Ging, I may only have a Hobbyking T6A radio and even that has throttle reversing, but it's accessible by the computer USB connection, not a switch on the transmitter. I think you'll also find that most of the high-end transmitters have a model memory function, so you just set that to the model you want to fly and it retrieves the settings for that model (including if the throttle channel is reversed), no need for a potentially dangerous and needless switch on the transmitter. Most good ESCs also won't fire up if the throttle is set to max when it's turned on, even my hobbywing pentium from ebay has that function. You wouldn't be falling behind the times, would you Ging?
As for the Gimp comments, I'm not even going to justify them with a comment other than to say that I am not in the least surprised that John came across a gimp figurine during his routine browsing of ebay.
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Post by ginginho on Feb 25, 2011 10:39:19 GMT 1
John, Ging, If you get down off your pomey high horses I believe you'll see that Parrothead was indeed referring to a XYZ (or did he mean XYH?) transmitter which, as it happens, DOES have a switch on the transmitter for throttle reversal, as I (rightly!) suspected. I seriously doubt that you suspected it, if you did you wouldn't have asked a question. I'd agree that having a physical switch is a daft feature, and only likely to cause problems. The radios that I know have a software switch, as outlined previously allowing for differing setups. I don't have a horse, pomey or otherwise. I don't understand what you are on about with this statement, and don't see what relevance my father has to this. If you must know he's a 70 odd year old who had a triple bypass and replacement hips and still going strong. And it's a software configurable switch in (to quote you) "fancy Spektrums" and similar quality radios. I said you were uninformed as within the same post that I've quoted you from, you asked whether his transmitter was one of these proving that you have no knowledge of that manufacturers products, do you disagree? You also asked "there's a switch on your transmitters that reverses the throttle?" suggesting that you do not have such a function on you radio. However you now say that you can do this using a PC, it may be software driven but it's still a switch. I don't need to find, I know, as I have a radio with model memory. You still have to set up the model, reversing servos (including throttle) as required. As said above, a physical switch does indeed seem daft. I can't understand this final sentence as I don't see how you would think that I'm falling behind the times. IIRC it was I (may have been amongst other voices) who recommended that you use a Hobbywing ESC (although not from E-Bay). I have six of them in varying sizes and find the reliable at a reasonable price. They do what I want them to do without any dramas and I assume yours does what you want it to do. You may inadvertantly touched on the real problem for Parrothead, if his ESC does power the motor at switch on time irrespective of the throttle stick position. Without know more details of his stick wiggling, switch throwing, battery plugging it's difficult to say for sure. |
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Post by john66 on Feb 25, 2011 12:06:49 GMT 1
John, Ging, If you get down off your pomey high horses I believe you'll see that Parrothead was indeed referring to a XYZ (or did he mean XYH?) transmitter which, as it happens, DOES have a switch on the transmitter for throttle reversal, as I (rightly!) suspected. IN YOUR FACE! How does it feel boys, tell me. Do you like it like that? Come on, WHO'S YA DADDY!?!? I'm afraid I'm not as misinformed as you might like to think Ging, I may only have a Hobbyking T6A radio and even that has throttle reversing, but it's accessible by the computer USB connection, not a switch on the transmitter. I think you'll also find that most of the high-end transmitters have a model memory function, so you just set that to the model you want to fly and it retrieves the settings for that model (including if the throttle channel is reversed), no need for a potentially dangerous and needless switch on the transmitter. Most good ESCs also won't fire up if the throttle is set to max when it's turned on, even my hobbywing pentium from ebay has that function. You wouldn't be falling behind the times, would you Ging? As for the Gimp comments, I'm not even going to justify them with a comment other than to say that I am not in the least surprised that John came across a gimp figurine during his routine browsing of ebay. Not only do I feel totally stupid, I also feel completely ashamed, knowing my sexual deviances have been exposed.... YOU WIN DILL!  John |
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