Model type: Semiscale ARF
Skill level: Intermediate builder; intermediate pilot
Wingspan: 62. 5 inches
Wing area: 609 square inches
Airfoil: Flat bottom
Length: 33 inches
Flying weight: 4 pounds, 7 ounces
Recommended Two Maxford USA U28309 brushless motors; two 25-amp
power system: ESCs; two 3S 2,200 mAh LiPo batteries in parallel
Radio: Four-channel minimum; five-channel if using differential
Needed to Radio system with four servos; electric power system
complete: including battery
Construction: Built-up wood
Price: $229.99 (airframe only)
weight: 4 pounds, 7 ounces
Radio system: Spektrum DX9 transmitter; Spektrum AR6210 receiver;
four EMAX 12-gram ES08MD digital metal-gear submicro
Power system Two Maxford USA U28309 motors; two Uranus 25-amp
used: ESCs; two 3S 2,200 mAh LiPo batteries in parallel; one
APC 8 x 6E thin electric propeller; one APC 8 x 6EP
reverse-rotation thin electric propeller
Flight duration: Approximately 9 minutes
• Unique subject.
• Quality construction.
• Motor mount/nacelle design.
• Prewired motor/ESC harness.
• Wing mounting options.
• Battery access.
• Manual needs updating to reflect hardware changes.
• Some predrilled holes didn’t align.
AT A GLANCE ...
There is plenty of rigging, but the holes are predrilled and the steps are
described in the manual so the process goes smoothly.
mounting some prebent metal brackets to the bottom. These
aren’t marked and are different. Dry-assemble the parts to
ensure you have the right bracket in the right position.
When you’ve determined the proper orientation and
attached them to the center top section, dry-mount the section
to the fuselage and align it to the lower section. If you slide the
top carbon rod into place and measure to match the manual’s
specifications, it will be perfect. You should set that distance
before fully securing the section to the fuselage. Check the
distances at the trailing edges, too. Extra care here will alleviate
potential problems when the entire wing is assembled.
The motors need to be installed in the nacelles and the
adjustable motor boxes set to provide adequate clearance for
the propellers. Then you can glue or screw the boxes in place.
Access to the wiring is easily done through the removable
front covers held in place by pegs and magnets.
The other wing panels require the CA hinges for the
ailerons to be done and servos mounted in the lower wing
sections. This should pose no surprises. The upper and lower
ailerons will be attached to each other via carbon rods and EZ
You need to decide if you are going to transport the Gotha
G.IV as a one-piece model or make provisions for the outer
wing panels (top and bottom) to come off together. This
changes the way you’ll do the rigging. I decided to build it as
a one-piece model. It easily fits into the back of my Saturn
The struts are different lengths and the manual describes
where each of them goes. The mounts are drilled and preglued
to each wing panel. This was nearly perfect on my model. One
wasn’t fully seated, but it was solidly glued, so there was no
I opted to drill a hole where needed and go about finishing
it. It made no difference in appearance, but it’s something you
should check before installing all of those bolts and nuts.
There is a ton of rigging on this model, but skipping it
would certainly have a dramatic visual effect on the outcome.
Maxford has done the hard work for you by drilling the holes
and carefully laying out an order to follow as you run the
provided black string.
It looks more complicated than it is! The fun part is listening
to people at the field talk about all that work … if they only
knew how simple it really was! I’m not telling them.
Adding the decals and setting the controls completes the
67 Model Aviation JUNE 2015 www.ModelAviation.com