Brodak BE-1265 049 Bluehead Break-In
First Day (1st): (6x4 wood prop)
Fuel: Nitro 10%-20% & Lube 18%-24% (65-castor:35-synthetic mix) & Remainder Alcohol
a) engine needle valve needs small spring (use Cox 09) for friction to prevent drift, small drift induces engine RPM oscillations (or small RPM accel/decel) – RPM oscillation leads to engine stop
b) use 2oz fuel tank for each separate start/stop run-cycle (thermal heat/cool cycle); first two (2) tanks, engine would not remain running – repeat restarts required – much needle adjustment required – suspect cylinder overheating – also, dark grey engine assembly lube sprayed from non-muffled exhaust port – run with continuous applied glow power – needle set to 1 ¾-to-2 ½ turns open – applied electric starter (4oz fuel burned)
c) third (3) tank – engine run continuous from full to empty tank – normal break-in run with continuous applied glow plug power – needle set to 1 ¾-to-2 turns open – applied electric starter (6oz fuel burned)
d) fourth (4) tank – engine would not remain running – repeat restarts required – much needle adjustment required – suspect cylinder overheating – exhaust gas normal light grey-to-clear in color – continuous applied glow power – needle set to 1 ¾-to-2 ½ turns open – applied electric starter (8oz fuel burned)
e) fifth (5) tank – engine run continuous from full to empty tank – normal break-in run with continuous applied glow power – needle set to 1 ¾-to-2 turns open – applied electric starter (10oz fuel burned)
f) required four plus (4+) hours to complete (a)-thru-(e) above; quit for the day – more break-in runs later
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