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Old Dec 20, 2012, 11:10 AM
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jack will the Towerpro 12a ESC plug in into the r6106hf futaba reciever
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Old Dec 20, 2012, 01:48 PM
Jack
USA, ME, Ellsworth
Joined May 2008
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I think both of those used the standard 3 pin servo connector so I would say yes. But I don't have either one.

Some Futaba connectors have that little protrusion on one corner so they cannot be plugged in wrong and the Futaba receivers are made to accept that, but the serrvos tat do not have the Futuba style connector should work if they are plugged in right.

Jack
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Old Dec 21, 2012, 08:44 AM
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heli motor

got you jack,i crashed my plane today not getting enough thrust it doesnt even climb dont know why i find the battery very heavy any lighter battery u suggest this is 2200mah im using . check the video below its a friens plane made of heli motor hes also new like me,
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Old Dec 21, 2012, 08:49 AM
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heli motor

we used a heli motor
heli motor scratch built rc airplane (0 min 59 sec)
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Old Dec 22, 2012, 09:36 AM
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jack i have the magic 18 speed esc can i use the same to build a 24 WS plane it fits in the futaba rx ,if yes can u suggest a motor and battery, ,esc pic below http://www.simprop.de/Seiten/Modellb...Speed10_18.htm
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Last edited by romanxdsouza; Dec 22, 2012 at 09:41 AM.
Old Dec 22, 2012, 10:12 AM
Jack
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That should work fine with about any brushless motor. I would keep the current draw down to 15A or less and not count on getting a reliable 18A out of it though.

http://www.simprop.de/Seiten/Modellb...Speed10_18.htm

Don't overload the BEC, it is a linear BEC and as the voltage goes up the current rating will have to go down:

BEC Spitzenstrom 3,8A
BEC Strom bei 7,5V (>30sec) 2,8A
BEC Strom bei 10V (>30sec) 1,5A

So it is OK with three small 9g servos on 3S but not more than that.

I looked at your question above but have no idea what the problem was and how much power was there...

On your friend's plane, he need to quit trying to fly at full throttle I think. And the CG might be wrong too. Do a test glide, if it will not glide straight and level it will not fly that way either. Especially if using too much power!

Jack
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Old Dec 22, 2012, 11:42 AM
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jack how do you keep the current draw down to 15A or less and not count on getting a reliable 18A out of it though.u mean to say that the esc is fine and can be used on a 24g brushless motor,2S 800mAh 20c Lipo , and im also confused on u saying"Don't overload the BEC, it is a linear BEC and as the voltage goes up the current rating will have to go down:

BEC Spitzenstrom 3,8A
BEC Strom bei 7,5V (>30sec) 2,8A
BEC Strom bei 10V (>30sec) 1,5A

can u please suggest prop,motor,battery for 24inch ws if u say the ESC above is ok

im guessing a 24g brushless motor,2S 800mAh 20c Lipo, would be fine but would any brand be fine any suggestions
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Last edited by romanxdsouza; Dec 22, 2012 at 11:51 AM.
Old Dec 22, 2012, 09:51 PM
Jack
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For a 24" wing span and a nice slow fling trainer I would like to use a slow fly prop on a 24 gram or so motor.

So one of the red/blue/silver motors like the Hextronik 2730 motors in their lower Kv would be a good choice. Something like this:

http://www.headsuprc.com/servlet/the...ushless/Detail

Look at the prop testing data there, it is a versatile motor. Look for something with about that weight and a similar Kv. Don't get a higher Kv as it will force you to use too small a prop.

You can go up to about 40 grams on the motor weight but keep the Kv down in the 1000-1200 range. There are many brands but if you focus on the weight and Kv it will get you the right motor.

You list of choices will be fine, the 2S battery will work with like a 8 x 3.8 slow fly and you can go with 3S and non-slow fly props too. If you want a little larger battery you could go up to 1200-1300 mAH or so.

Jack
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Old Dec 23, 2012, 12:12 PM
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k so jack if im building a 24inch i would need
8 x 3.8 slow fly prop

24 gram - 40 grams on motor with Kv between 1000-1200 range but how many volts rx 7.4v

ESC WOULD B THE SAME RIGHT as per post#125 http://www.simprop.de/Seiten/Modellb...Speed10_18.htm

please let me knw if my esc will do fine
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Last edited by romanxdsouza; Dec 30, 2012 at 12:49 PM.
Old Dec 23, 2012, 12:16 PM
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.

Sorry jack to many questions there
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Last edited by romanxdsouza; Dec 30, 2012 at 12:51 PM.
Old Dec 30, 2012, 12:31 PM
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hey jack compliments of the season ive ordered for a Turnigy 1300mAh 2S 20C Lipo Pack

im planing on making a 24ws plane i have the BLM2822-7T http://www.unholzer-modellbau.de/pro...a011b04cd7bd21 28mm,29grms, case length 22mm and its a 7 turn motor with 1360 KV or 1360 RPM per VOLT i guess this wouldnt do for a 24inch WS correct , IF THIS MOTOR NOT OK how about these motors


http://hobbysea.com/products.php?21&...25dd85779a3b8b


OR


http://hobbysea.com/products.php?255...25dd85779a3b8b


but my futaba rx says Voltage Range: 4.8 - 7. 4V, so will these motors be fine , and esc is


http://www.headsuprc.com/servlet/the...ushless/Detail please let me kow which motor to go for and if the esc will be fine,WAITING FOR YOUR REPLY TO PLAN MY 24ws slow flyer PLANE
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Last edited by romanxdsouza; Dec 30, 2012 at 01:17 PM.
Old Jan 10, 2013, 08:57 AM
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waiting patiently for yor reply jack also what would the AUW have to be the moyor i got is 29grams n prop i hav 8x6
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Old Jan 10, 2013, 12:04 PM
Jack
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Joined May 2008
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Quote:
Originally Posted by romanxdsouza View Post
waiting patiently for yor reply jack also what would the AUW have to be the moyor i got is 29grams n prop i hav 8x6
Hi Roman,

Been kind of busy and not reading this thread. I guess maybe no one else is either?

Here are the basic on your question. A 29 gram motor can handle an input power of about 87 Watts. It takes about 50 Watts per pound to fly so you are good for a plane that weighs about 1.74 lbs/28 oz./790 grams.

The page for the motor says that, on 2S, the 8 x 6 is good for 5800 RPM. Looking at an APC E 8 x 6 on flybrushless.com shows that 6000 RPM is good for about 250 grams of thrust:

http://www.flybrushless.com/prop/view/72

By the rule of thumb that a weight to thrust ratio of 0.33:1 is needed to fly, 250 grams of thrust will fly a plane that weighs about three times that amount or 2 750 grams.

As you can see the same motor on 3S with a 7 x 6 prop gets much better RPM at 9,300 and the thrust goes up to about 625 grams or so. So 3S with a 7 x 6 would be a better prop choice.

You can try the 8 x 6 on 3S and see if it overheats the motor. If it does, you'll have to back off on the throttle a little. Or you could even trim the prop tips down a little to make a 7 x 6 out of it.

Jack
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Old Jan 14, 2013, 05:52 AM
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i guess no 1 is reading this thread jack,thank u for ur help and sorry about asking so many questions learned alot thank u again
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Old Jan 14, 2013, 06:36 AM
Jack
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16,925 Posts
You are welcome, I don't mind the questions.

If you have a new question is it best to start a new thread unless it is about the same plane or matter. That is because if people do not subscribe to a thread the first time they read it or reply to it and become subscribed automatically (a choice in your account settings), they will not see the thread again in their My RCGroups listing. That is probably what accounts for a thread not getting very many replies.

Good luck with the builds, the info is almost always here but not alway easy to find.

Jack
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