Engine Dimensions - Metric

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Two-Stroke Engines for Fixed Wing R/C Aircraft
	A	B	C	D	E	F	G	H	J	S
.10 FP, .10 FP-S	31.4	11	54	38	58.2	38.7	23	33.2	45.2	M5
.10 LA	31.4	11	54	38	56	38.7	23	33.2	45.2	M5
.15 CV-A	33	14.4	63.7	40	61	39.5	24.8	30.8	48.5	M5
.15 FP, .15 FP-S	33	14.4	56.5	40	63.2	39.5	24.8	30.8	50.2	7/32-32
.15 LA, .15 LA-S	33	14.4	56.5	40	61	39.5	24.8	30.8	48.5	M5
.20 FP, .20 FP-S	36	14	66.5	45	74.5	46.5	29	39.5	60	1/4-28
.25 AX	38	15	75.5	45	75.1	53	30.6	45.5	59.2	UNF1/4-28
.25 FP, .25 FP-S	36	14	66.5	45	74.5	46.5	29	39.5	60	1/4-28
.25 FX	38	15	75.6	46	75.5	53	30	45.5	60	1/4-28
.25 LA, .25 LA-S	36	14	67.5	44	74.5	46.5	29	39	60	1/4-28
.25 LA-S	37	15	87.1	48	74.4		28			1/4-28
.30 Wankel Rotary			60.5	65.7	58.3					1/4-28
.32 SX	38	15	75.5	45	73	53	30.3	45.5	60	1/4-28
.35 AX	38	15	75.5	45	77.4	53	30.6	45.5	61.5	UNF1/4-28
.35 FP, .35 FP-S, .40 FP, .40 FP-S	40.5	17.5	74.2	48	82.2	51.2	32	42.5	66	1/4-28
.40 LA, .46 LA, .40 LA-S, .46 LA-S	40.5	17.5	74.5	48	85	51.2	32	42.5	69	1/4-28
.46 AX	44	17.5	85.2	51	85.2	60.4	35		67.4	1/4-28
.46 FX, .40 FX	44	17.5	85	51	88	60.5	35	52	70	1/4-28
.46 VX-DF RC	44		116		91		35			1/4-28
.50 SX	44	17.5	85.7	52	88.8	60.7	36		70.5	1/4-28
.55 AX	44	17.5	85.3	51	90.5	60.4	36	52	72	1/4-28
.60 FP	52	25	92	61	102	64	42	51.5	81	5/16-24
.61 FX	52	25	95.6	61	100.5	66.5	43	54	79	5/16-24
.65 AX	52	25	93.3	60	99.5	66.6	40	54.1	78.5	UNF5/16-24
.65 LA	52	25	64	62	85.4	64	42		85.4	5/16-24
.65 VR-DF	52	25	133.5	61	101.7	66	43.4	53.5	79.7	5/16-24
.75 AX	52	25	94.5	61	103.4	66.6	42.6	54.1	81.4	UNF5/16-24
.91 FX	52	25	96	61	103	66.5	42.6	54	81.5	5/16-24
.91 VR-DF	52	25	133.5	61	109.5	66	43.5	53.5	87.5	5/16-24
.91 VR-DF (small head)	52	25	133.5	61	103.5	66	43.5	53.5	81.3	5/16-24
.95 AX	52	25	94.5	61	103.4	66.6	42.6	54.1	81.3	UNF5/16-24
1.08 FSR	58	30	108	70	119	75	48	60	95	3/8-24
1.20 AX	58	25	100.2	67	109.2	69.8	46.5		85.7	5/16-24
1.40 RX, 1.40 RX-FI	58	25	105	70	118.4	78	48.4		93.9	5/16-24
1.60 FX, 1.60 FX-FI	64	30	115.5	74	123.2	80	51.5		96.7	3/8-24
BGX-1	74	32	129.5	85	142.5	99	60.5	83	111	3/8-24
Single Cylinder Four-Stroke Engines
	A	B	C	D	E	F	G	H	J	S
110FS-a	52	25	114.5	61	125.4	66.5	42.6	54	103.8	UNF5/16-24
155FS-a w/Pump	58	25	127.6	67	138.6	77	47	64.5	114	UNF5/16-24
56FS-a	44	17.5	102.3	51	101.7	59	34	49.3	84	UNF1/4-28
72FS-a	45	20	103.6	54	108	59.5	36	49.5	90	UNF1/4-28
81FS	50	21	112	57	117.5	66	40	55.5	97	UNF5/16-24
81FS-a	50	21	112	57	117.5	66	40	55.5	97	UNF5/16-24
FL-70	45	20	103	54	107.5	59.5	35.4	49.5	89.5	1/4-28
FS-120S III	58	25	134.5	67	139.5	77	46	64.5	116	5/16-24
FS-120S-E	58	25	104	67	138.5	77	46	64.5	115	5/16-24
FS-120S-SP	58	25	157	67	139	77	46	64.5	115	5/16-24
FS-200S	58	25	136	67	145	77	48	64.5	119	UNF5/16-24
FS-26	36	14	84	44	86.5	48.5	29	40	70	1/4-28
FS-30	36	14	112	44	86.5	75	29		71.5	1/4-28
FS-40	42	17.5	77.5	49	98	57	32.5	48.1	80.5	1/4-28
FS-52S, FS-52S Heli	44	17.5	80.5	51	101	59	34	49.3	83.5	1/4-28
FS62V	44	17.5	102.8	51	105.1	60	34.1	51.3	87.5	UNF1/4-28
FS-70	50	21	89	59	116.5	66	40	55.5	96	5/16-24
FS-70 II	50	21	111	58	116.7	66.3	39.6	55.8	96.4	5/16-24
FS-70 Ultimate-P	45	20	109.7	54	105.4	59.5	35.4	49.5	87.4	1/4-28
FS-91	52	25	91.5	60	121	66.5	42.6	54	99	5/16-24
FS-91 II, FS-91 II FI	52	25	114.5	60	123	66.5	42.6	54	101	5/16-24
FS-91S II-P	52	25	91.5	60	123	66.5	42.6	54	101	5/16-24
FS95V	52	25	115.7	61	119	66.5	42.6	54	97.5	UNF5/16-24
Helicopter Engines
	A	B	C	D	E	F	G	H	J	S
.32 SX-H, .32 SX-HX	38	15	75	45	76	53	30.3	45.5	60.6	1/4-28
.32 SX-MX	38	15	127.4	45	82.5	85.7	30.6		58
.37 SZ-H	38	15	67.2	45	76.8	46	30.6		61	1/4-28
.46 FX-H	44	17.5	84.2	51	88	60.5	35	52	70	1/4-28
.50 SX-H	44	17.5	85.8	52	89	61	36		70.5	1/4-28
.50 SX-H Hyper	44	17.5	85.8	52	89	61	36	74	70.5	1/4-28
.55 HZ-H Hyper	44	17.5	76.6	52	90.9	51.6	36	42.85	72.6	UNF1/4-28
.55 HZ-Hyper	44	17.5	76.6	52	90.9	51.6	36	42.85	72.6	UNF1/4-28
.55 HZ-R DRS	44	17.5	76.6	52	90.9	51.6	36	42.85	72.6	UNF1/4-28
.61 LX-H	52	25		61		88.7	42.6		79	5/16-24
.61 RX-H WC	52	25	93	61	100.5	65	42.6	52.5	79	5/16-24
.61 RX-HG WC	52	25	80.5	61	100.5	52.5	43.6	40	79	1/4-28
.61 SX-H WC	52	25	93	61	100.5	65	42.6	52.5	79	5/16-24
.61 SX-HG WC	52	25	80.5	61	100.5	52.5	43.6	40	79	1/4-28
.70 SZ-H	52	25	81.3	61	99	55.3	42.6		77.5	5/16-24
.91 HZ	52	25	98	61	102.7	54.4	43	42.9	81.2	UNF5/16-24
.91 HZ F3C	52	25	92.5	61	102.7	56.4	43	43.9	81.2	UNF5/16-24
.91 HZ-PS 3D	52	25	98	61	102.7	56.4	43	43.9	81.2	UNF5/16-24
.91 HZ-R 3C	52	25	98	61	102.7	54.4	43	42.9	81.2	UNF5/16-24
.91 HZ-R 3D	52	25	98	61	102.7	54.4	43	42.9	81.2	UNF5/16-24
.91 HZ-R 3D	52	25	98	61	102.7	54.4	43	42.9	81.2	UNF5/16-24
.91 SX-H		25	82		109		42.6
.91 SX-H C-Spec	52	25	83.4	61			42.6		87.4	5/16-24
.91 SX-H C-Spec-P	52	25	109.4	61		56.4	42.6		87.4	5/16-24
.91 SZ-H	52	25	83.8	61		56.4	42.6		87.4	5/16-24
.91 SZ-H PH-Hyper	52	25	97.5	61	119.2	64.4	43	51.9	87.4	5/16-24
FS-52S Heli	44	17.5	80.5	51	101	59	34	49.3	83.5	1/4-28
Marine Engines
	A	B	C	D	E	F	G	H	J	S
.10 FP-M	31.4	11		38	64		23		51.5	1/4-28
.10 FP-MX	31.4	11		38	72				51.5	1/4-28
.18 CV-R-M	31.4	11	56	39		41	25		50.5	M5x0.8
.20 FP-M	36	14		45	76		29		61.5	1/4-28
.21 RZ-M	37	21		45	74.7		29.6		59.7	1/4-28
.21 VZ-M	37	21	65	45	89.1	44	30.8		73.8	1/4-28
.21 XZ-M Inboard	37	21	65.6	45	81.75	44	31.6	33.5	66.15	UNF1/4-28
.32 F-MX	38	15		45	87				63	1/4-28
.46 VX-M	45	21		53	87		37		68	1/4-28
.61 VR-M, .65 VR-M	52	25		61	104.3		43		84.3	5/16-24
.81 VR-M	52	25		61	105.5		43.4		84.1	5/16-24
Car & Buggy Engines
	A	B	C	D	E	F	G	H	J	S
.10 FP-B	31.4	11	54	38	67	38.7	23	33.2	55	M5
.10 FP-BX	31.4	11	72.7	38	67	38.7		33.2	55	M5
.12 CV	31.4	11	58.6	39	87.2	41	25	35.5	74.4	M5
.12 CV	31.4	11	58.6	40	90.2	41	25	35.5	70.7	M5
.12 CV-R	31.4	11	70	39	83.7	41	25		70.9	M5
.12 CV-RX	31.4	11	88.8	40	90.9	41	25		70.9	M5
.12 CV-X	31.4	11	74.8	39	87.2	41		35.5	74.4	M5
.12 TG	31.4	11	58.4	39	89.5	40.9	25.4	35.4	77	M5
.12 TG-P	31.4	11	52.4	39	89.5	34.9	25.4	29.4	77	UNF1/4-28
.12 TR (P), .12 TR (P)-T	31.4	11	52.5	39	84.4				71.6	M5
.12 TR, .12 TR R-Spec	31.4	11	58.5	39	85				71.6	M5
.12 TZ (P) T3 Speed Tuned	31.4	11	52.4	39	87	34.9	25.4	29.4	74.5	1/4-28
.12 TZ (P)-T3 ABC	31.4	11	49.9	39		34.8	25.4		77.2	1/4-28
.12 TZ (P)-T5 ABC	31.4	11	49.9	39		34.8	25.4		77.2	1/4-28
.12 TZ (S)-T3 ABC	31.4	11	49.9	39		34.8	25.4		77.2	M5x0.8
.12 TZ-T3 ABC	31.4	11	55.9	39		40.8	25.4		77.2	M5x0.8
.12 XZ	31.4	11	52.4	39	90.1	34.9	25.4	29.4	76.6	UNF1/4-28
.15 CV	31.4	11	58.6	39	90.2	41	25		70.7	M5
.15 CV-M	31.4	11	58.5	40	65
.15 CV-MX	31.4	11	91	40	65
.15 CV-R	31.4	11	56	39	83.9	41	25		71.1	M5
.15 CV-RX	31.4	11	74.8	40	91.1	41	25		71.1	M5
.15 CV-X	31.4	11	74.5	39	90.2	41	25		70.7	M5
.15 RX	37	21	60	45	87.3	41.5	29	31	72.5	1/4-28
.18 CV-R	31.4	11	56	39	100.9	41	25		80.9	M5
.18 CV-R (P)	31.4	11	49.9	39	100.9	41	25		80.9	M5
.18 CV-RX	31.4	11	74.8	40	100.9	41	25		80.9	M5
.18 TM	31.4	11	53.6	39		34.8	25.4		81.2	M7x1
.18 TZ (P)	31.4	11	49.9	39		34.8	25.4		81.2	1/4-28
.18 TZ Turbo	31.4	11	55.9	39		40.8	25.4		81.2	M5x0.8
.18 TZ(S) Turbo	31.4	11	49.9	39		34.8	25.4		81.2	M5x0.8
.18 TZ-TX	31.4	11	75.3	39		40.8	25.4		81.2	M5x0.8
.21 RG, .21 RG (P)	37	21	65.6	45	95.8	44	29.6	33.5	80.7	1/4-28
.21 RG-B, .21 RG-B (P)	37	21	65.6	45	95.8	44	29.6	33.5	80.7	1/4-28
.21 RG-M	37	21	88.5	45	74.5	67	29.6		59.5	1/4-28
.21 RG-MX	37	21	107	45	74.5	67	29.6		59.5	1/4-28
.21 RG-X (P)	37	21	84	45	95.8	44	29.6	33.5	80.7	1/4-28
.21 RZ-B, .21 RZ-B (P)	37	21	79	45	101	44	29.6	33.5	86	1/4-28
.21 RZ-R (P)	37	21	65.5	45	96.3	44	29.6	33.5	81.5	1/4-28
.21 RZ-V99B, .21 RZ-V99B (P)	37	21	65.6	45	101	44	30.6	33.5	86	1/4-28
.21 TM Revo	31.4	11	53.6	39	101.3	41	25	35.5	85.3	M7x1
.21 TM T-Maxx	31.4	11	53.6	39	101.3	41	25	35.5	85.3	M7x1
.21 VG	37	21	65.6	45	102.7	44	30.8	33.5	87.4	1/4-28
.21 VG (P)	37	21	65.6	45	102.7	44	30.8	33.5	87.4	UNF1/4-28
.21 VG (P) ES	37	21	65.6	45	102.7	44	30.8	33.5	87.4	1/4-28
.21 VZB V-Spec	37	21	64.9	45	110.6	44	30.8	33.5	95.3	1/4-28
.21 VZB V-Spec	37	21	64.9	45	110.6	44.3	30.8	33.8	95.3	1/4-28
.21 VZ-B V-Spec	37	21	64.9	45	110.6	44	30.8	33.5	95.3	UNF1/4-28
.21 VZ-B V-Spec II	37	21	64.9	45	110.6	44	30.8	33.5	95.3	UNF1/4-28
.21 VZ-B V-Spec-T (P)	37	21	64.9	45	110.6	43.9	30.8	33.8	95.3	1/4-28
.21 VZ-R, .21 VZ-R Turbo II	37	21	64.9	45	99	43.9	30.8		83.7	1/4-28
.21 XZ-B	37	21	65.6	45	101.9	44	31.6	33.5	86.3	UNF1/4-28
.21 XZ-R	37	21	65.6	45	102.4	44	31.6	33.5	86.8	UNF1/4-28
.25 XZ (P)	37	21	65.6	45	109.2	44	31.6	33.5	93.6	UNF1/4-28
.28 XZ	37	21	65.6	45	111.9	44	31.6	33.5	95.9	UNF1/4-28
.30 VG (P)	37	21	65.6	45		44	30.8		97.7	1/4-28
.30 VG (P) ES	37	21	65.6	45	113	44	30.8	33.5	97.7	1/4-28
.30 VG (P) SR Savage	37	21	65.3	45		44	30.8		97.7	1/4-28
.30 VG (P)-X	37	21	82.5	45		44	30.8		97.7	1/4-28
FS-26S-C	36	14	57.8	43	84.6	39.8	29	32.8	70.4	1/4-28
FS-26S-C II	36	14	57.8	43	85.4	39.8			70.9	1/4-28
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Twin & Multi-Cylinder Four-Stroke Engines
	A	B	C	D	E	F	G	H	J	S
FR5-300	122			234	158.5					3/8-24
FR7-420 Sirius	122			230	158.5					UNF3/8-24
FF-320	68	56.5	23.5	196	181.5	112.5	125.5	76	62	5/16-24
FT-300	90	55	35	240	148	62	80	56	10	3/8-24
FT-160	68	56.5	23.5	196	120	50.5	63.5	54		5/16-24
FT-120II	68	56.5	23.5	196	120	50.5	63.5	54		5/16-24
IL-300 Dia-Star	76	40	50	116	234.3	173	113	48.6	40	3/8-24

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