User Manual

GS R/C
DLA ENGINE OPERATING-INSTRUCTION
MANUAL
08/20/2014 Copyrighted Material
Owner’s Manual All Rights Reserved 03180-10000
Page - 26 DLA 32, 58, 64, 116, 116-I2 & 128cc Rev. A.05.01
TEMPERATURE, ENGINE, LIMITS:
The engine head temperature should never be allowed to reach or exceed 120
O
C (248
O
F) and the
crankcase should be restricted to 70
O
C (158
O
F). Here is where some temperature measurements
and perhaps temperature telemetry would be quite useful. On hot flying days, > 95
O
F, you may
consider richening the “rear” carburetor’s high-end needle and reduce the rpm by ~ 200 to help
cool the engine.
Fuel – GAS (Type of Gas and Oils Mixture Ratios)
Well filtered (~ 10 microns), 87 Octane (89 Octane is acceptable) Gasoline is recommended for all
DLA Engines. Higher Octane ratings will not improve the engine performance, and may cause the
engine to perform more poorly, run slower and most often overheat. Select a good quality, 2-cycle
oil, and mix the oil and gasoline to the following ratios:
o Break-in and Trial Running: 25:1 to 30:1 Gasoline:Oil
 30:1 is preferred
 Use ONLY Carbon Based, 2-cycle oil for break-in
o Typical Flying: 40:1 to 50:1 Gasoline:Oil
 45:1 is Typical
Engine or Carburetor damage caused by fuel additives, such as nitro, alcohol, or other ingredients
are not covered under the warranty. Running the improper gasoline to oil mixture ratio, running
the carburetor’s high-end adjustment at a too lean setting, overly-advancing the timing and engine
over heating are not covered by the warranty.
A Chart of Gasoline to Oil mixture ratios is provided at the end of the manual for your
convenience.
TANK INSTALLATION and PLUMBING:
DLA Engines typically burn fuel at a rate, generally measured, in ounces per minute, at full
throttle, as shown in the list below. The selection of the tank size is determined by several factors,
such as:
 How long do you want to fly and what fuel reserve you want to maintain:
o Ex: for a DLA 32 at 0.6 oz/min, a desired flight time of twenty (20) minutes and a
5% reserve …. A 14 to 16 oz tank would be required. (0.6x 20 x 1.05 = 13 oz )
 Fuel Consumption by engine displacement:
o DLA 32cc 0.50 – 0.7 oz per minute (Typ, Set up & rpm dependent)
o DLA 58cc 0.60 – 0.8 oz per minute (Typ, Set up & rpm dependent)
o DLA 64cc 0.67 – 0.9 oz per minute (Typ, Set up & rpm dependent)
o DLA116 Twin & IL 0.85 – 1.2 oz per minute (Typ, Set up & rpm dependent)
o DLA128cc 1.20 – 1.4 oz per minute (estimated)