Combo Find
05-20-2008 | 03:13 PM
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From: Paphos, CYPRUS
Combo Find
Hey guys, i'm trying to make a combo for a 3D airplane with good stuff on it and i have some questions. First, i think i will go for the Futaba 7C radio since it's enough for me to start. However, i have seen on a futaba 3PK some parameters about the signal speed response for the servos. The HRS, the PCM and the PPM. They told me that the PPM is for digital and analog servos, BUT the HRS is only for the digital servos and if i put an analog servo with that parameter on, then the analog servo will burn. Does the 7C has these parameters too?
For the time, i'm looking for something cheap, like that: http://www3.towerhobbies.com/cgi-bin...?&I=LXDUL8&P=7
It says that is capable of 3Ds. Anyone have this model? If yes, please, can you share with me a bit of info?
For the time, i'm looking for something cheap, like that: http://www3.towerhobbies.com/cgi-bin...?&I=LXDUL8&P=7
It says that is capable of 3Ds. Anyone have this model? If yes, please, can you share with me a bit of info?
05-20-2008 | 03:31 PM
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From: Poolesville, MD
RE: Combo Find
PPM/PCM has little to do with the servo itself.
It is the mechanism used to transfer data to the receiver.
As far as the servo is concerned it doesn't know if the transmitter is communicating via PCM or PPM.
05-20-2008 | 03:35 PM
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From: Poolesville, MD
RE: Combo Find
PPM/PCM has little to do with the servo itself.
It is the mechanism used to transfer data to the receiver.
As far as the servo is concerned it doesn't know if the transmitter is communicating via PCM or PPM.
The UCD 46 will work fine with Standard Servos all around or you can go the recommended route and put a high torque servo on the rudder.
Digital servos are not needed with this plane.
Remember digital servos have great "holding power" which is important for larger planes with big control surfaces and prone to blow back and flutter.
I wouldn't worry about digital servos until you are into something larger than a .60+ sized plane.
05-20-2008 | 03:42 PM
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From: Paphos, CYPRUS
RE: Combo Find
Ok. I think i found my plane. Now i must communicate with my LHS that brings great planes and see what we can do for that. He also brings JR and Hitec servos. I think i will go for Hitecs, don't you think so?
05-20-2008 | 03:49 PM
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RE: Combo Find
ORIGINAL: Osirisf16
Hey guys, i'm trying to make a combo for a 3D airplane with good stuff on it and i have some questions. First, i think i will go for the Futaba 7C radio since it's enough for me to start. However, i have seen on a futaba 3PK some parameters about the signal speed response for the servos. The HRS, the PCM and the PPM. They told me that the PPM is for digital and analog servos, BUT the HRS is only for the digital servos and if i put an analog servo with that parameter on, then the analog servo will burn. Does the 7C has these parameters too?
Hey guys, i'm trying to make a combo for a 3D airplane with good stuff on it and i have some questions. First, i think i will go for the Futaba 7C radio since it's enough for me to start. However, i have seen on a futaba 3PK some parameters about the signal speed response for the servos. The HRS, the PCM and the PPM. They told me that the PPM is for digital and analog servos, BUT the HRS is only for the digital servos and if i put an analog servo with that parameter on, then the analog servo will burn. Does the 7C has these parameters too?
05-20-2008 | 03:57 PM
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From: Poolesville, MD
RE: Combo Find
ORIGINAL: Osirisf16
Ok. I think i found my plane. Now i must communicate with my LHS that brings great planes and see what we can do for that. He also brings JR and Hitec servos. I think i will go for Hitecs, don't you think so?
Ok. I think i found my plane. Now i must communicate with my LHS that brings great planes and see what we can do for that. He also brings JR and Hitec servos. I think i will go for Hitecs, don't you think so?
I've used close to 130, 7.00/ea high torque CHEAPIE analog servos on many planes w/o incident.
Strangely I've had the most problems with Hitec's not that they are bad in any way... I just had 3 bad Hitecs over 12 purchased and only 2 bad "cheap" servos over 130 purchased.
In call cases I test the servos once installed, before flight...
e.g. resisting surface movement while moving the sticks, doing this with the engine running at various throttle settings ( this is how I caught the bad Hitecs ), even having other people examine my setup in case I overlooked anything ( this is how I caught the 2 bad cheap servos ).
I have yet to have a failure with a JR, Futaba or even a Hobbico servo.
05-20-2008 | 04:06 PM
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RE: Combo Find
There are a number of U-Can-Do planes in my club, and people can't stop talking about them. They are gentle enough for a second or third low wing plane, but throw in some power and high rates and they can spin, climb, just about everything except for some pretty week knife edges (they roll over).
Everyone loves that plane, you will to.
Everyone loves that plane, you will to.
05-21-2008 | 12:52 AM
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From: Paphos, CYPRUS
RE: Combo Find
os
Yeah, i heard that in car forum too about Hitecs. The only problem is that i never had ANY problem with a Hitec. Of course, the Hitec i'm buing aint any cheap. On the other hand, they are few compare to you. You must destroying a lot of servos, right? For an engine, i will definately go for an OS. And i think i will go for the 4-stroke 70AX. The 46AX is too cheap to be true i can tell. I didn't expect such prices for an airplane's engine.100 dollars for the 46AX and 175 dollars for the FL-70. My OS Vspec on my car cost me 250 euro here, that's 320 dollars for you
ORIGINAL: opjose
Whatever works best for YOU.
I've used close to 130, 7.00/ea high torque CHEAPIE analog servos on many planes w/o incident.
Strangely I've had the most problems with Hitec's not that they are bad in any way... I just had 3 bad Hitecs over 12 purchased and only 2 bad "cheap" servos over 130 purchased.
In call cases I test the servos once installed, before flight...
e.g. resisting surface movement while moving the sticks, doing this with the engine running at various throttle settings ( this is how I caught the bad Hitecs ), even having other people examine my setup in case I overlooked anything ( this is how I caught the 2 bad cheap servos ).
I have yet to have a failure with a JR, Futaba or even a Hobbico servo.
ORIGINAL: Osirisf16
Ok. I think i found my plane. Now i must communicate with my LHS that brings great planes and see what we can do for that. He also brings JR and Hitec servos. I think i will go for Hitecs, don't you think so?
Ok. I think i found my plane. Now i must communicate with my LHS that brings great planes and see what we can do for that. He also brings JR and Hitec servos. I think i will go for Hitecs, don't you think so?
I've used close to 130, 7.00/ea high torque CHEAPIE analog servos on many planes w/o incident.
Strangely I've had the most problems with Hitec's not that they are bad in any way... I just had 3 bad Hitecs over 12 purchased and only 2 bad "cheap" servos over 130 purchased.
In call cases I test the servos once installed, before flight...
e.g. resisting surface movement while moving the sticks, doing this with the engine running at various throttle settings ( this is how I caught the bad Hitecs ), even having other people examine my setup in case I overlooked anything ( this is how I caught the 2 bad cheap servos ).
I have yet to have a failure with a JR, Futaba or even a Hobbico servo.
For an engine, i will definately go for an OS. And i think i will go for the 4-stroke 70AX. The 46AX is too cheap to be true i can tell. I didn't expect such prices for an airplane's engine.100 dollars for the 46AX and 175 dollars for the FL-70. My OS Vspec on my car cost me 250 euro here, that's 320 dollars for you
05-21-2008 | 11:36 AM
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From: Poolesville, MD
RE: Combo Find
ORIGINAL: Osirisf16
You must destroying a lot of servos, right?
You must destroying a lot of servos, right?
I don't understand why you would say that?
I've already listed ALL of the servos I've had problems with.
I do have over 24 planes though, which is why I'm employing so many servos... check my profile for most of the list.
