14 CFR Ch. I (1-1-19 Edition) (2) Test burner. The test burner must be a modified gun-type such as the Park Model DPL 3400. Flame characteristics are highly dependent on actual burner setup. Param- eters such as fuel pressure, nozzle depth, stator position, and intake airflow must be properly adjusted to achieve the correct flame output. 430 VerDate Sep<11>2014 12:50 Apr 30, 2019 Jkt 247046 PO 00000 Frm 00440 Fmt 8010 Sfmt 8002 Y:\SGML\247046.XXX 247046 ER31JY03.012 spaschal on DSK3GDR082PROD with CFR Pt. 25, App. F