HobbyKing.com New Products Flash Sale
Raehm's blog
Posted by Raehm | Dec 16, 2013 @ 02:21 PM | 1,886 Views
Bored with RTF planes from Parkzone, I've been on the hunt for inexpensive kits to build using all the electronics I've accumulated from crashed/sold/retired air planes.

GWS has several to offer, but there's a problem: They are made from EPS! That means lots of reinforcement, at least if you expect to keep your bird flying for some time.

Reinforcing EPS is a popular subject, and I've learned from lots of different solutions. Of course, the trick is to strengthen the air frame without adding a lot of weight.

From my experiences to date, I developed what I think I this is the idea solution which employs some supplies that you won't find mentioned anywhere in RCGroups.

More to Follow. Much More.
Posted by Raehm | Jan 12, 2012 @ 03:36 PM | 3,297 Views
The stock motor mount is probably inadequate for my G15 (power15 equivilant)
Posted by Raehm | Dec 20, 2010 @ 10:16 AM | 3,667 Views
P-47D
# Wingspan: 42.2 in (1070mm)
# Overall Length: 36.9 in (940mm)
# Flying Weight: 40.0 oz (1130g), 42.5 oz (1200g) with retracts and flap servos
# Motor Size: 15-size 950Kv BL Outrunner
# Prop Size: 9.5 x 7.5
# Speed Control : E-flite 30A Pro Brushless
# Recommended Battery: 3S 11.1V 2200mAh 25C Li-Po

Extra 300
* Wingspan: 40.6 in (1030mm)
* Overall Length: 36.8 in (935mm)
* Flying Weight: 34.5 oz (980 g)
* Motor Size: 15-size brushless outrunner (950Kv)
* Prop Size: 10.5 x 9
* Speed Control : 30A Pro SB Brushless ESC
* Recommended Battery: 11.1V 3S 25C 2200mAh Li-Po (included)

Bf-109
# Wingspan: 43.5 in (1105mm)
# Overall Length: 39.4 in (1000mm)
# Flying Weight: 35.3 oz (1000 g)
# Motor Size: 15-size 720Kv brushless
# Prop Size 2-Blade 12 x 12E, 3-Blade Propeller (10.6 x 7.8)
# Speed Control : EFL 30A Switch-Mode BEC BL
# Recommended Battery: 11.1V 3S 1800–2200mAh Lithium Polymer

T-28
# Wingspan: 44.0 in (1120mm)
# Overall Length: 36.0 in (915mm)
# Flying Weight: 31.0 oz (875 g)
# Motor Size: 480-size 960Kv brushless outrunner (installed)
# Propeller F4U: T-28 "9.5 x 7.5"
# Speed Control : E-flite® Pro 30A brushless with Switch-Mode BEC (installed)
# Recommended Battery: 3S 11.1V 1800–2200mAh Li-Po (sold separately)

P-51
# Wingspan: 39.0 in (990mm)
# Overall Length: 33.5 in (850mm)
# Flying Weight: 25.0 oz (710 g)
# Motor Size: 480-size 960Kv brushless outrunner
# Prop Size: 9 x 6
# Speed Control : 18A brushless...Continue Reading
Posted by Raehm | Dec 12, 2010 @ 10:57 AM | 3,624 Views
Super Cub Floats. I added the extra mount on the rear ( counter sink it ) and add plastic to the front a GWS mount.

The front wire of the float will go just in front of the hump we land on .
I took a dremal and cut it out ( just a grove ) then glued in extra pastic from
a GWS mount. The rear mount comes with the floats, I counter sunk it a little
but you want the floats up a little in the front. When you take off on grass you have to hold a lot of up till she lifts off.
Posted by Raehm | Dec 10, 2010 @ 04:53 PM | 4,060 Views
This is an interesting comparison.
Posted by Raehm | Dec 08, 2010 @ 09:57 AM | 3,801 Views
This is my review of alternative motors.

At this point, I am using the GForce G10. See Below:

My first upgrade was to the Eflite Power 10, which is pricey but very reliable (and durable if you crash alot).

A cheaper alternative is the GForce G10 (http://www.valuehobby.com/product_de...=1&item_id=228)

Here are the comparative specs:

Eflite Power 10
KV: 1100
Weight: 122 g (4.3 oz)
Max. efficiency: ??
No load current / 10 V: 1.2 A
Current capacity: 32A
Motor Diameter: 35mm (1.40 in)
Shaft diameter: 5mm (.20 in)
Overall Length: 43mm (1.60 in)
Suggested prop: 10x5 to 12x6 electric
Price: $60

Gforce G10
KV: 1250
Weight: 106g (3.7oz)
Max. efficiency: 80%
No load current / 10 V: 1.2 A
Current capacity: 35A
Motor Diameter: 35mm
Shaft diameter: 4 mm
Overall Length: 1.55
Suggested prop: 12X5, 11x8.5, 10x7
Price: $23.50

As you can see, the GForce G10 has a higher KV (more speed) and a higher current capacity (for larger props). The GForce mounts directly on the stock motor mount, but you need to use the prop adapter included. It's aluminum, and very prone to warping in moderate to hard landings. Be sure to order replacements prop adapters when ordering this motor. Also, you cannot use PZ props with this prop adapter, but you don't want to anyway.

Props: I prefer the APC 10 x 7 for it's speed, but it is not durable and breaks on hard landings. An alternative is the EMP Neodym 10 X 7, which like the APC, comes with inserts for different...Continue Reading
Posted by Raehm | Nov 13, 2010 @ 02:48 PM | 3,220 Views
A Universal Battery Elimination Circuit (UBEC) is a 'switch mode' DC regulator that takes the high voltage (up to 26 volts) of the main battery pack and converts it to a consistant and safe 5 or 6 volts (selectable) for your receiver and servos. A UBEC is needed if the Electronic Speed Control (ESC) being used for the motor does not have a built in Battery Elimination Circuit (BEC), or if the BEC of the ESC is inadequate to power the number and/or size of servos being used.

Using this UBEC is a safer way to go on large models for the following reasons:

1. Most built-in BEC circuits are 1 to 2 amp 'linear mode' circuits which are only useful for 2 or possibly 3 standard size servos when using a 3 cell Lipo battery. If you use more servos, or a higher voltage battery pack, you will almost certainly overload the BEC, causing a crashed model.

2. In an ESC with a built-in BEC, excessive heat generated in the ESC by the current draw of the motor and/or BEC can cause total loss of power to the receiver/servos, resulting in a crashed model. The chance of total loss of power is greatly reduced when a separate receiver battery pack or UBEC is used. If the ESC overheats and shuts down (no power to the motor), you will still have power to the receiver/servos, and will be able to maintain control of the model.

Available at ValueHobby.com


Pentium 40A ESC Manual