Help needed i delecing a power system for my foamy
guys i just finished building a trainer foam rc airplaine with dihedral
wingspan = 920mm
length = 700mm
weight = 170 grams
its a foamy
please tell me which motor battery and esc to choose

What about these...
1. D2830-11 1000kv Brushless Motor
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=12921
2. Hobby King 30A ESC 3A UBEC
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=15205

itll be too powerfull for the plane, and the plane only weigt 150 grams, and moreover its a trainer

how about his power system
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9187
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=4318
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6311

Quote from: aviator on January 19, 2012, 09:56:34 PM
What about these...
1. D2830-11 1000kv Brushless Motor
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=12921
2. Hobby King 30A ESC 3A UBEC
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=15205

I am using this for my slow stick.

How about this?

Using 6A ESC will limit you to draw 6A at max by your power system. The description of motor you are asking for, says 6A but this could be wrong. I mean the product listings in hobbyking are not always correct, so go with above or any ~10A ESC. This way you will also have an option to experiment in future with higher current power setups too.

The battery looks fine and can draw 10A at max without harm.

Go ahead!!!

Thanks.

And don't forget to post maiden video(If you can).

ya sure, and by the way today i chucked my plane from the terrace of my building that is 4th floor, it has already the servos, reciever and reciever battery, so i flew like a baby, even without the motor :0 . it was like a glider . and behaved excellently in the air.

but i already placed the order yesterday, so what can i do now, i can ask hk to change the 6amp plush esc with this http://www.hobbyking.com/hobbyking/store/__11429__HobbyKing_12A_BlueSeries_Brushless_Speed_Controller.html
but do i really need to do that , i mean is it necessary , coz the plush escs are really good , and i have the plush 60 amp esc which is really reliable, and btw the 12 amp esc which im thinking of exchanging with the 6amp esc actually costs 5cents more so, u think they can adjust for that 5 cents?

yeah !!!!!! finally changed the esc to a 12amp one woahoa

If I got you correct, Did you changed the ESC to 12A in your order. That is great! and Yes if the plane is gliding to ground very well, it will fly well, unless you increase weight too much from now on.

hey and what is the Wing Loading of your plane, By that we can also predict the plane's behavior.
Just measure the AUW (Includes weight of everything that is on-board on plane) in "Oz" and divide it with wing Area in sq.ft.

For conversions, 1 Oz = 28.35 grams
          And,      1sq.ft = 144sq.Inch

All the best for the maiden.

Hope you will post a maiden video.

Thanks.

ya i did change the esc to a 12 amp one, presently im using a battery pack cosisting of 4 duralcell ones for powering the servos and reciever , so the pack only weighs too much, so when i get the motor esc nd batt and put them on and remove this temporary battery pack , its weight will further reduce by 20 grams which is great, and i sure will be posting the maiden flight video , and most of all thanks for ur help.

Its a pleasure to make somebody fly!!! 

Cheers.

hope i dont crash

Are you flying on simulator? It helps a lot to calm down the nerves during maiden.

i must have spent like over 50 hours on simulator

on sim i can do most of the professional stunts but when i went to the field with my previous own built 50 inch balsa plane 4ch, i was sooooooooooooooo damn nervous. my  hands were shivering on the sticks, i took off and it went about above 100 feet. and to turn left i gave left aileron, then i noticed that the throws on the ailerons was too much, so it spun to the left, so to compensate for that i gave rapid right, so spun to the right ,then went out of control and came straight to the ground, >>>>>>>>>>>>>> then bits and pieces. ive repaired everything now,nd ive rebuilt evrything now, but i dont wanna risk my baby again into the air with all that fear , so i will fly that one only after doing some 20 flights with this second plane ie foamy

BTW Sumeet , what should be the idle  Wing loading  for better gliding of a plane.

There is not any specific value for ideal Wing Loading. Just remember, Less the wing loading, More easier to glide.

Thanks.

For a trainer it could be around 5~8oz/sq.ft

Wing Loading as calculated = 3.5 oz / sq feet
so is it good

Great! Too light your plane is. It would be a lot easier to fly than I expected. You are good to go but remember No heavy winds. This is too light and will be too easy for moderate wind gusts to push it in any direction out of control. Now it only depends on power system if it has power and speed to pull you out those gusts. So better, If you are first time flyer, then wait for a light wind situation (Wind speed around 5~8km/hr would be good).
Your plane has the ability to fly slower, So if you can, Fly Indoor in a large Hall and check CG before flight.

All the very best for maiden.
Thanks.

ya ill make sure ill fly in little or no wind . iam only getting annoyed of that fact that my order(from hk) containing motor,esc,battery,etc. is not even packed still. dont know more how long i should wait for my order to come.

and btw i didnt use dpron, epo , eps or even  styrofoam. i used wat they locally call thermacoal 1inch thick in the local fancy stores

and used a balsa strip for the main fuse and many balsa strips for reinforceing the wing and control surfaces

All of my parcels from Hk comes in ~20days from date of ordering. Hope you receive it early.

yeah i hope , thanks