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        Help! What radio gear from Hobby King for a 20 inch (40 cm) Cessna 180 type model?

#1 knlever Mar 25, 2011 09:45 AM

What radio gear from Hobby King for a 20 inch (40 cm) Cessna 180 type model?
 
I have been looking for radio gear for a first model,
For example this model: http://www.rcgroups.com/forums/showthread.php?t=841748

http://www.hobbyking.com/hobbyking/s...idProduct=9042

So far I have located the following on the Hobby King web site:

TX and RX

HobbyKing 2.4Ghz 6Ch Tx & Rx V2 (Mode 2)(THROTTLE ON THE LEFT)

Servos: Hobby King 3.7g / .4kg / .10sec Micro Servo

What battery ESC and motor should I use? :popcorn:

#2 UNGN Mar 25, 2011 12:23 PM

Quote:

Originally Posted by knlever (Post 17782422)
I have been looking for radio gear for a first model,
For example this model: http://www.rcgroups.com/forums/showthread.php?t=841748

http://www.hobbyking.com/hobbyking/s...idProduct=9042

So far I have located the following on the Hobby King web site:

TX and RX

HobbyKing 2.4Ghz 6Ch Tx & Rx V2 (Mode 2)(THROTTLE ON THE LEFT)

Servos: Hobby King 3.7g / .4kg / .10sec Micro Servo

What battery ESC and motor should I use? :popcorn:

5g HXT Brushless
GWS 5030 or 6030 prop
Plush 6A ESC
350/360 2S battery

#3 knlever Mar 25, 2011 07:02 PM

Thanks but I need more specifics. Is this ok?

C1818 Micro brushless Outrunner 3500kv (9g) $9.99 9g

http://www.hobbyking.com/hobbyking/s...idProduct=5377


TURNIGY Plush 10amp 9gram Speed Controller

http://www.hobbyking.com/hobbyking/s...idProduct=4204

GWS prop

GWS EP Propeller (DD-5030 127x76mm) (6pcs/set)

http://www.hobbyking.com/hobbyking/s...dProduct=10033

Rhino 360mAh 2S 7.4v 20C Lipoly Pack

http://www.hobbyking.com/hobbyking/s...idProduct=7301

#4 flashkick Mar 25, 2011 11:04 PM

that speed control is overkill. the turnigy plush 6amp is plenty. and the hxt 5gram motor is also great.

#5 jimjim06 Mar 26, 2011 06:19 AM

"What radio gear from Hobby King for a 20 inch (40 cm) Cessna 180 type model?"

Is it 20 inch or 40 cm?
20 inches is 50.8 cm, its quite a difference at this scale.

Regards/

Tommy

#6 knlever Mar 26, 2011 09:31 AM

20 inch, 50 cm careless again, sorry

UNGN, thanks for the updated links, nice motor and esc, nice price

Just to confirm the charger: http://www.hobbyking.com/hobbyking/s...idProduct=7637

I can use my own dc adapter? Any concerns about the quality of the DC output - noise, voltage fluctuations etc?

#7 UNGN Mar 26, 2011 12:43 PM

I use a DC power supply from an external hard drive. As long as you don't try to charge batteries at an Amp-hr rate greater than the power supply, you'll be fine.

This is only a concern with really large batteries.

#8 knlever Mar 26, 2011 06:48 PM

Thanks. The Hobby King receiver weighs 13g according to this:

http://www.rc-radiocontrol.com/hobby...eceiver-6ch-v2

Whatever I get, weight has to be within the ranges specified below for trainers. Or I could calculate wing cubic loading of a model that flies slowly enough.

The Cessna 170 at the bottom of the page weighs in at 86g and has a span of 24 inches. Assuming a wing area of 24 x 4 = 96 inches and the weight of 3 ounces, plugging it into the calculator below gives a cubic loading of 5.5 and wing loading of 4.5 oz per sq in / 13.5 oz per sq dm and it flies slowly. Keeping this cubic loading for my model should give the same sort of slow flight.


Cubic wing loading calculator

http://www.ef-uk.net/data/wcl.htm


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