a noob question....

Is the motor always on? I mean I see some switches for the receiver, but the motor is always connected to the ESC and the battery - straight. So does it mean that the prop always turns?

Pankaj

Quote from: sahilkit on August 18, 2009, 02:28:59 PM
is this the power setup you are using ??
http://www.gwsus.com/english/product/powersystem/edp50.htm
then it can produce only 60grams of thrust at 7.2volts with a EP3020 prop
in the video did you give full power at the end ?? if so then.....lets see what other could say
sahil

Dear Sahil,

Thank you very much for your thought! Unlike in the link you have browsed, the power system I have used a tailor made, which I have composed.

The same motor and prop but the ESC supplies 10amps, and the battery is 11.1v 3S 15C, so the thrust will be 280g approx. You can calculate and check!

And regarding the fuse, you are right, it should be reinforced with tape. Agreed

Quoteregarding the fuse, you are right, it should be reinforced with tape. Agreed Wink

BTW let us see who will finish there model 1st,after seeing your thread i just got my spark back   

best

sahil

Quote from: the merog on August 19, 2009, 09:00:08 AM
Dear Sahil,

Thank you very much for your thought! Unlike in the link you have browsed, the power system I have used a tailor made, which I have composed.

The same motor and prop but the ESC supplies 10amps, and the battery is 11.1v 3S 15C, so the thrust will be 280g approx. You can calculate and check!

I'm as skeptical as Sahil. If you are getting 280g thrust out of that, my prediction is that you'll burn out the motor pretty soon. I don't even see a heatsink on the motor. Would be interesting to know about your "composition" to get that much more thrust.

That motor is one of the most efficient brushed motors I have come across, more efficient than a lot of the brushless motors out there.

Quote from: PankajC on August 18, 2009, 04:40:13 PM
a noob question....

Is the motor always on? I mean I see some switches for the receiver, but the motor is always connected to the ESC and the battery - straight. So does it mean that the prop always turns?

Pankaj

Pankaj,

Switches are just for ourselves, to ensure safety. If you check all the connections prior to every flight, good enough, no need to put a switch. Orelse, no need. In my case, I always keep the set up dosconnected from the batt. when not in use. So, no need of switches.

And regarding the motor activeness, as the ESC takes the power from the Batt and supplies to Receiver, and cut it off at ZERO throttle input all by itself, the motor is dead at aero throttle input! So, no spinning when your throttle leaver is completely down.

Regards...//MEROG

Quote from: RotorZone on August 19, 2009, 10:40:25 AM
I'm as skeptical as Sahil. If you are getting 280g thrust out of that, my prediction is that you'll burn out the motor pretty soon. I don't even see a heatsink on the motor. Would be interesting to know about your "composition" to get that much more thrust.

That motor is one of the most efficient brushed motors I have come across, more efficient than a lot of the brushless motors out there.

Guys,

I have taken some suggestions from Mr.GPW, who invented this design as 'Trainer One' and some other RC friends of US and NZ about the power system for this plane, prior to the start of the build.

So, let us see if it burns the system or not!

Let me fly with it and check it!

Thank you for your point...//MEROG

Guys,

Some serious RC guys warned me about the power system as some of us did. So, to ensure safety, I'm gonna change the LiPo... I'm gonna deploy 2S 7.2v 15C 650mAh. Wish me all the best!

Thank you...//MEROG

Good decision. The less serious RC guys are glad to help

hi, good basic work. friend i see an inherent design weakness of ur effort. Ur fuselage is a sheet and when ur yaw servo operates there will be Newtons third law. Also dynamic behaviour is way different from static operation. Run a T secton of balsa strip from nose to tail. Also, electric motor mounts are too powerfull for sheet themocole to handle. Re enforce with fevicol and balsa dust/ table salt paste.

Quote from: foamy on September 15, 2010, 09:56:52 AM
hi, good basic work. friend i see an inherent design weakness of ur effort. Ur fuselage is a sheet and when ur yaw servo operates there will be Newtons third law. Also dynamic behaviour is way different from static operation. Run a T secton of balsa strip from nose to tail. Also, electric motor mounts are too powerfull for sheet themocole to handle. Re enforce with fevicol and balsa dust/ table salt paste.

fevicol and salt paste!!! this is something new to me. What does it do?

Pankaj

fevicol by itself is just a synth glue. I does not have a catch. Salt crystals give structure. If u are working with balsa, on joints and small gaps, drop a few grains of table salt and drop cyno. U can sand it off in about 5 minutes. For slow drying, do the same with quick fix.

I use Cyano and baking powder, the process is the same as stated above. Must try salt, thanks Foamy!

check my thread 'first attempt' this plane is almost unbreakable and it is also strong against wind further more all items are easily available even in a small city except electronics and battery. and if u calculate electronics there is not much difference

Hi Merog,
Just a suggestion before flying it outdoors.... The stress of rubber bands digging into the leading edge will create a dent and break your wing in half in 2 flights.
Add a tooth pick along the leading edge and at the back of wing with tape or fevicol so all the stress is on the stick.

I would also add a balsa spar or a bamboo skewer underneath the wing section so it doesnt buckle by cutting a slot into the wing section.
See the image attached hereby; (both tailplane and wing have a carbon strengthener on both planes) A balsa or bamboo skewer will help strengthen the wing and tail;


Happy flying and safe landing,
Deepak

Any flight video?