Noise Reduction Tips: Worcester Model Aero Club

Noise Tests

We monitor noise emissions from models to test they fall within BMFA guidelines of 82dBA @ 7m, and some results are listed here for guidance. Naturally some fail and they may not fly at a noise sensitive site until brought with limits.

Model	Engine	Silencer	Prop Type	Prop Size	Front (dBA)	Left (dBA)	Rear (dBA)	Right (dBA)	Pass/Fail	Notes
H9 Arresti 40	Irvine 53	Standard	Bolly	11.5 x 7	81	78	78	80	PASSED
BH Super Air	TT 54FS	Standard	MA Scimitar	11 x 8	79	77	80	79	PASSED
Azzuro	SC46	Standard	APC	11 x 6	79	77	70	78	PASSED
Raptor 30 Heli	TT36	Zimmerman	Heli	Heli		85			FAILED
CML Ultimate	ASP 180FS	Standard	APC	17 x 6	82	82	78	82	PASSED	Achieved with throttle Tx limited to 54%. Otherwise 85dBA.
Laser 3D	Irvine 46	Standard	Flexi	11 x 6	81	78	73	76	PASSED
BH Decathlon	TT GP61	Standard	APC	14 x 6	82	80	74	81	PASSED
BH Chipmonk	Saito FA80	Standard	Graupner	12 x 7	82	79	79	80	PASSED
BH Chipmonk	SC 70FS	Standard	MA 'K' Series	14 x 6	80	78	73	77	PASSED
Super Air	Irvine 46	Standard	APC	11 x 6	80	75	71	80	PASSED
Limbo Dancer	OS 46FX	Standard	APC	12.25 x 3.75	76	73	70	76	PASSED
YT Katana 40	OS70FS	Standard	APC	13 x 7	85	80	75	85	FAILED
YT Katana 40	OS70FS	Standard	APC	14 x 6	81	78	74	81	PASSED
Wot 4	Fox 45	Custom can	Yashica	11 x 7.7	82	77	74	80	PASSED
Kyosho Pitts	Irvine 53	Standard	APC	11 x 6	81	76	74	75	PASSED
Pitts like Biplane	ST45	Standard	APC	11 x 6	80	76	71	77	PASSED
BH Super Chipmonk	TT91FS	Standard	APC	14 x 6	82	75	70	80	PASSED
Funtana 40	OS70FS	Standard	APC	14 x 4 W	83	82	75	80	FAILED
BH Travel Air	SC46	Standard	APC	11 x 7	79	77	69	76	PASSED
Funtana 40	OS70FS	Standard	APC	14 x 6	82	80	76	80	PASSED
Fenriss	OS91FS	Standard	Graupner	14 x 7	84	79	73	80	FAILED
Tiger Moth	ST2500	Standard	MA 'K' Series	18 x 8	84	75	76	77	FAILED
WP Extra 60	TT Pro61	Standard	APC	13 x 6	84	79	72	80	FAILED
WP Extra 60	TT Pro61	Standard	APC	13 x 7	83	77	78	79	FAILED
DP Extra 300S	DL50	JE BCM Pitts	JXF Wood	23 x 8	94	90	86	88	FAILED
SG Harmon Rocket	RCV58CD	Standard	APC	11.5 x 6	84	83	79	82	FAILED
SG Harmon Rocket	RCV58CD	Standard	APC	12 x 7	81	76	70	77	PASSED
SG Harmon Rocket	RCV58CD	Standard	APC	12 x 6	82	78	73	78	PASSED
Vmar Bulldog	SC70FS	Standard	APC	13 x 8	81	79	71	77	PASSED
ChippaHawk	OS61FS	Standard	MA 'K' Series	12 x 6	84	81	76	81	FAILED
Puppeteer	Irvine 53	Dustbin	APC	13 x 8	80	75	73	76	PASSED
ChippaHawk	OS61FS	Standard	APC	13 x 6	81	81	74	78	PASSED
Super Air	OS46LA	Standard	APC	11 x 7	75	74	70	76	PASSED
Parkzone Spitfire	Std 480 Brushed	-	Std	9 x ?	62	66	61	67	PASSED
TT Trainer 2	TT GP42	Standard	APC	10 x 6	80	76	69	78	PASSED
SG Extra 300S	SC91FS	Standard	APC	14 x 6	84	83	75	82	FAILED
FunFly	SC46	Standard	APC	11 x 4	82	78	75	78	PASSED
Super 60	SC46	Standard	Wood	11 x 7	75	75	67	75	PASSED
EdoModel F15	Brushless	-	EDF	64mm	75	71	71	74	PASSED
Ultrafly Edge 540	Std	-	APC E	11 x 5.5	74	63	60	60	PASSED
Dazzler	SC40	Standard	MA 'K' Series	11 x 7	77	73	65	77	PASSED
SG Extra 300S	SC91FS	Standard	APC	14 x 7	82	83	73	80	FAILED
Astro Hog	ASP70FS	Standard	APC	14 x 6	80	77	71	79	PASSED
FunFly	SC46	Standard	APC	12 x 4	79	77	73	78	PASSED
Graupner Extra 300L	Laser 80	Standard	Graupner	13 x 7	84	82	75	80	FAILED
Spacewalker II	ASP120FS	Standard	APC	16 x 8	79	80	72	78	PASSED
Seagull Decathlon	Irvine 46	Standard	APC	12 x 7	76	75	69	75	PASSED
Graupner Extra 300L	Laser 80	Standard	APC	13 x 7	82	80	70	80	PASSED
Eurobat	Moki 210	Custom	Graupner Sonic	20 x 10	86	82	78	83	FAILED
H9 Tribute	GP42	Standard	APC	10 x 5	80	78	70	81	PASSED
BH Chipmonk	OS91FS	Standard	APC	12 x 7	83	82	74	81	FAILED
BH Chipmonk	OS91FS	Standard	APC	14 x 6	82	82	75	80	PASSED
H9 Extra 260	ZDZ60	Krumscheid	Biela	20 x 10 3-blade	87	83	79	83	FAILED
Parkzone P51	Parkzone	-		9.5 x ?	66	63	61	65	PASSED
Edge 540	OS55AX	Custom	APC	12 x 7	77	76	68	74	PASSED
E-Flight Taylorcraft	EF Park480	-	Xoar - Wood	12 x 6	69	66	61	65	PASSED
Sebart Katana	Hacker	-	APC E	15 x 8	70	63	61	66	PASSED
Lander Panther	2W20	-	HET	6904	80	80	79	80	PASSED	Electric ducted fan
Astro Hog	ASP91FS	Standard	APC	13 x 7	84	82	79	85	FAILED	Using 20% nitromethane.
Astro Hog	ASP91FS	Standard	APC	14 x 7	83	80	79	83	FAILED	Using 20% nitromethane.
Astro Hog	ASP91FS	Standard	APC	14 x 7	81	76	72	80	PASSED	Using 10% nitromethane.
Hog Bipe	Saito 91FS	Standard	APC	15 x 6	82	79	78	82	PASSED
Sig Cub	Laser 150	Standard	APC	16 x 8	82	79	70	77	PASSED
WM LA Flyer	Irvine 40	Standard	APC	11 x 6	81	78	66	78	PASSED
Wot 4	Super Tigre 45	Standard	APC	11 x 7	82	81	71	82	PASSED
Flair Puppeteer	SC52FS	Standard	APC	12 x 6	78	77	68	74	PASSED
Jetta	OS45	Tuned Pipe	APC	10 x 8	84	83	81	86	FAILED
Funfly	OS45	Standard + 2nd baffle	APC	12 x 4	81	77	76	78	PASSED
Extra 260	3W75	3W LL80	Menz	24 x 10	90	86	82	87	FAILED
Volador	Leo 37	Standard	APC	11 x 3	79	79	73	81	PASSED
WM Extra 300	Saito 220	Standard	APC	20 x 8	84	85	84	87	FAILED	@ 8m!
Super 60	OS40FS	Standard	APC	11 x 6	75	75	67	76	PASSED
Acrowot	OS61FX	Standard	APC	12 x 6	80	75	70	77	PASSED
Parkzone P51	Parkzone 480 brushless	1300mA/h LiPo	Std	Std	67	63	60	64	PASSED
CMPro Extra 300L	ASP91FS	Standard	APC	14 x 8	82	78	74	81	PASSED
BH Ultimate	Saito 125A	Standard	APC	15 x 8	82	80	73	77	PASSED
Taylorcraft	Brushless	-	Xoar	10 x 8	69	68	67	64	PASSED
Edge 540	OS91FX	Standard	APC	15 x 6	86	83	76	82	FAILED
Edge 540	OS91FX	Standard + deflector	APC	15 x 8	82	78	74	81	PASSED	82dBa with 10% nitro, 84dBA with 16% nitro.
Arising Star	Super Tigre 45	Standard	JXF	11 x 6	85	81	77	82	FAILED
AJ Slick	Hacker A50 - 6S	-	Wood	18 x 8	79	72	70	74	PASSED
	Irvine 72	Standard	Dynathrust	14 x 6	83	80	72	83	FAILED
Arising Star	Super Tigre 45	Standard	JXF	11 x 8	80	82	77	84	FAILED
Arising Star	Super Tigre 45	Standard	Smart - Wood	11 x 7	80	82	77	82	PASSED
Tucano	Super Tigre 51	Standard	APC	12 x 6	79	76	70	75	PASSED
Harmon Rocket	Jen 57	Standard + deflector	APC	12 x 6	79	77	73	78	PASSED
Bossanova	OS50SX	Standard	APC	12 x 5	85	79	71	78	FAILED
Bossanova	OS50SX	Standard	APC	12 x 6	81	79	72	77	PASSED
Ready 2	OS46FX	Standard	APC	11.5 x 7	82	77	71	79	PASSED
Ultrastick 40	OS70FS	Standard + deflector	APC	12 X 8	83	80	76	79	FAILED
Ultrastick 40	OS70FS	Standard + deflector	Master Airscrew	14 x 6	82	79	78	73	PASSED
MIG 3	OS35FX	Standard	Master Airscrew	10 x 6	77	75	74	78	PASSED
Puppeteer	OS52FS	Standard	APC	12 x 6	75	71	68	80	PASSED
Spacewalker	SC52FS	Standard	APC	12 x 6	77	74	70	76	PASSED
Ultimate Bip	OS91FS	Pitts	APC	15 x 8	84	82	84	74	FAILED
Limbo Dancer	GP42	Standard	APC	10 x 4	79	76	69	80	PASSED
Ultimate Bip	OS91FS	Pitts	APC	15 x 8	84	83	74	82	FAILED	One exh exit closed