.60-size Graupner Extra 300S Conversion
07-07-2003, 07:25 PM
#1
Senior Member
Thread Starter
.60-size Graupner Extra 300S Conversion
Hi,
Here is one of my latest e-conversions. It is a .60-sized Graupner Extra 300S ARF converted to electric power.
The new Graupner Extra 300S was designed for glow power but easily converts to electric flight with very few changes. The Extra 300S has a large 63” wingspan, 46” overall length, 639 sq. in. wing area, and is meant to fly at around 105 oz. (6.6lbs) with glow fuel.
I choose to power my Extra 300S with a MaxCim 13D brushless motor. It mounted easily using the 0.8oz MaxCim motor mount and the hardware that came with the plane.
A secondary goal I had for this project was to use some of the latest battery technology and build an impressive Lithium-powered high performance aerobat!
To supply power to the system, I decided to initially try a 14-cell, HR-SC2600mAh NiMH from Diversity Model Aircraft. I would then use that as my baseline to test out the advantages of using some new high-discharge Lithium Polymer cells from Kokam USA.
You can read more about it here.
Here is one of my latest e-conversions. It is a .60-sized Graupner Extra 300S ARF converted to electric power.
The new Graupner Extra 300S was designed for glow power but easily converts to electric flight with very few changes. The Extra 300S has a large 63” wingspan, 46” overall length, 639 sq. in. wing area, and is meant to fly at around 105 oz. (6.6lbs) with glow fuel.
I choose to power my Extra 300S with a MaxCim 13D brushless motor. It mounted easily using the 0.8oz MaxCim motor mount and the hardware that came with the plane.
A secondary goal I had for this project was to use some of the latest battery technology and build an impressive Lithium-powered high performance aerobat!
To supply power to the system, I decided to initially try a 14-cell, HR-SC2600mAh NiMH from Diversity Model Aircraft. I would then use that as my baseline to test out the advantages of using some new high-discharge Lithium Polymer cells from Kokam USA.
You can read more about it here.
07-23-2003, 03:54 PM
#3
Senior Member
Thread Starter
.60-size Graupner Extra 300S Conversion
Henke,
Yes I did, many times.
In fact, if you look in my link above, you'll see that I added a power upgrade near the bottom of the page for a 5s4p pack so I could switch to a 15x10 prop for better knife edge.
I love this plane!
Regards.
Yes I did, many times.
In fact, if you look in my link above, you'll see that I added a power upgrade near the bottom of the page for a 5s4p pack so I could switch to a 15x10 prop for better knife edge.
I love this plane!
Regards.
07-23-2003, 05:02 PM
#4
.60-size Graupner Extra 300S Conversion
Looks very nice!!
does´t the motor vibrate if only mounded in the back?
Just rememberd, be careful not to fly it too fast... my friend lost his Extra, half the stab broke off in a dive, as I understood it he pushed it full throttle 45degree down
does´t the motor vibrate if only mounded in the back?
Just rememberd, be careful not to fly it too fast... my friend lost his Extra, half the stab broke off in a dive, as I understood it he pushed it full throttle 45degree down
07-23-2003, 06:39 PM
#5
Senior Member
Thread Starter
.60-size Graupner Extra 300S Conversion
No vibration problems with the APC 15x10 e-prop. This setup also now uses an aluminum TruTurn spinner so there is no wobble either.
My ShowFlyer setup uses a 20x11 prop. It is much larger than my Extra prop and it doesn't have any vibration or torque problems.
I think the front mounting scheme is nice but a bit heavy and overkill.
Graupner fixed the tail strength issue with a brace kit that now comes with the model.
My ShowFlyer setup uses a 20x11 prop. It is much larger than my Extra prop and it doesn't have any vibration or torque problems.
I think the front mounting scheme is nice but a bit heavy and overkill.
Graupner fixed the tail strength issue with a brace kit that now comes with the model.
