Hope Engines Summary Table
Compiled by Adrian Duncan and Alan Strutt
Name | Model | Year | Description | Disp | Bore | Stroke | Type | Plug | Timer | L/R | Ind | Weight | Holes | D/S | Equivalents † |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Hope .09 | 1st | 1955-1957 | Conventional loop-scavenged design. Die cast case with bolt-on backplate. Apparently a contemporary of the "Super" 19 and 29 models. Very similar to the two larger models in design terms. | 1.61 (.099) | 12.7 | 12.7 | G | 1/4" | N/A | L | FRV | 50 (1.75) | 4 | D | ENYA 09 #3001 FUJI .099 K&B GR'HEAD 09 K.O. .099 |
HOPE 19 | 1st | 1949-1950 | Hope's first loop-scavenged design, featuring sand-castings throughout. Cast iron cylinder with thin integral fins and bolt-on head. Mounting lugs set above engine centre line. Screw-in backplate with plain alloy back tank. Brass thimble-style needle. | 3.12 (.190) | 16 | 15.5 | G | 1/4" | N/A | L | FRV | 161 (5.70) | 4 | S | AMCO 3.5 GLOW K.O. 19 McCOY 19 RV |
2nd | 1950-1951 | Basically very similar to the preceding model, but used die-cast components throughout. Mounting lugs set at the axial centre-line. Stroke slightly increased over that of its predecessor. Cooling fins still very thin, but one fin fewer than before. Screw-in backplate and tank carried over. Mounting not interchangeable with previous model. Tank now anodized red. As-cast case finish. | 3.22 (.196) | 16 | 16 | G | 1/4" | N/A | L | FRV | 147 (5.20) | 4 | D | DC 350 G ENYA 19 MAMIYA 19 McCOY 19 STUNT | |
3rd | 1951-1952 | Almost identical to the previous model, but has thicker integral cooling fins on the cylinder, with one fewer fin to make up for the added thickness. The needle is also changed from a stubby "thimble" to a conventional bent-wire item. Shiny case finish. | 3.22 (.196) | 16 | 16 | G | 1/4" | N/A | L | FRV | 147 (5.20) | 4 | D | DC 350 G ENYA 19 MAMIYA 19 McCOY 19 STUNT | |
4th | 1952-1953 | Once again, almost identical to the previous model apart from a slightly re-profiled cylinder and head as well as a tumbled finish to the castings. | 3.22 (.196) | 16 | 16 | G | 1/4" | N/A | L | FRV | N/K | 4 | D | ENYA 19 FUJI 19 MAMIYA 19 | |
HOPE SUPER 19 | 1st | 1953-1957 | Revised model using the same cylinder but a different main casting. Backplate now secured by 4 screws, with no provision for back ta nk. Flexible extension needle valve. | 3.22 (.196) | 16 | 16 | G | 1/4" | N/A | L | FRV | 145 (5.10) | 4 | D | ENYA 19 #4002 FOX 19 SPLITCASE K&B GRNHEAD 19 |
HOPE B | 1st | 1947 only | Hope's first model. Sand-cast case. Cast iron cylinder featuring integral fins and a blind bore. Separate brass venturi tube. Screw-in backplate with alloy tank, 2 mm dia. metal fuel tubing. 6 mm dia. crank thread; cam grind on crank; taper drive for prop driver. | 4.83 (.295) | 17.9 | 19.2 | S | 3/8" | ENC | R | FRV | 193 (6.8) | 4 | S | FORSTER 29 RV K&B TORP. 29 OK 29-B O&R 29 |
2nd | 1947-1948 | Similar to the previous model, but has integral cast alloy venturi stack in same location; 6 mm dia. crank thread; cam grind on crank; taper drive for prop driver; alloy tank. Some examples have red-painted cases. | 4.83 (.295) | 17.9 | 19.2 | S | 3/8" | ENC | R | FRV | 193 (6.8) | 4 | S | OK SUPER 29 TORP. SPECIAL | |
3rd | 1948-1949 | As above, but with glow ignition. Slightly repositioned integral cast alloy venturi stack; 6 mm dia. crank thread; no cam grind on shaft; square-on-crank drive for prop driver attachment; disc-type prop driver; alloy sleeve covering front main bearing relief for timer; alloy tank. | 4.83 (.295) | 17.9 | 19.2 | G | 3/8" | N/A | R | FRV | 184 (6.5) | 4 | S | K VULTURE K&B GLO-TORP 29 McCOY 29 RV OK HOTHEAD YULON 30 | |
4th | 1949 only | As above, but now has 7 mm dia. crank thread; no cam grind on shaft; large taper drive for prop driver; thick trapezium cross-section prop driver; un-machined front of main bearing; alloy tank. NOTE: other minor variants are known! | 4.83 (.295) | 17.9 | 19.2 | G | 1/4" | N/A | R | FRV | 184 (6.5) | 4 | S | FOX 29 STUNT FROG 500 Mk. I FUJI 29 FRV K&B 29 O.S. 29 YULON 29 K.O. 29 | |
HOPE NEW 29 | 1st | 1950 only | Short-lived early version of completely revised design which replaced the Hope B. Featuried loop scavenging and die-cast components but retained the blind bore of the Hope B. At least some examples used magnesium alloy castings throughout. The rod and shaft were rather weak in design terms. This may in fact have been an experimental model. | 4.84 (.295) | 18.5 | 18 | G | 1/4" | N/A | L | FRV | 193 (6.8) | 4 | D | As above. |
2nd | 1950-1952 | As above, but all known examples featured aluminium alloy castings throughout and had a far stronger con-rod and crankshaft. | 4.84 (.295) | 18.5 | 18 | G | 1/4" | N/A | L | FRV | 193 (6.8) | 4 | D | FORSTER G29 FUJI 29 RV MAMIYA 29 FRV O.S. NEW 29 | |
3rd | 1952-1953 | Identical to the previous model below the exhaust, but featured a different cylinder design using a drop-in liner in a cast cooling jacket combined with a separate bolt-on cylinder head. | 4.84 (.295) | 18.5 | 18 | G | 1/4" | N/A | L | FRV | 193 (6.8) | 4 | D | ENYA 29 FORSTER F29 FUJI 29 S/A | |
HOPE SUPER 29 | 1st | 1953-1957 | Completely revised model which replaced the New 29 series. Used a different main casting. Cylinder had integrally-turned cooling fins once more. Backplate now secured by 4 screws, with no provision for back tank. Flexible needle valve extension. | 4.82 (.294) | 19 | 17 | G | 1/4" | N/A | L | FRV | 177 (6.25) | 4 | D | ENYA 29 #5002 FROG 500 Mk. II O.S. MAX-I 29 VECO 29 TCC |
SUPER HOPE 60 | 1st | 1948-1949 | Very limited production racing design, most likely constructed more for prestige purposes than anything else. Extremely well made. Lapped cast-iron piston. | 9.72 (.593) | 23.5 | 22.4 | S | 10mm | OPEN | L | RDV | 379 (13.37) | 4 | S | MAMIYA 60 McCOY 60 RHBC NORDEC R10 SUPER DEVIL 60 |
2nd | 1948-1949 | Glow-plug ignition version of the above model, equally well made. | 9.72 (.593) | 23.5 | 22.4 | G | N/A | L | RDV | 351/12.38 | 4 | S | ENYA 63 RV KO 60 McCOY 60 Ser. 20 MAMIYA 60 RV NORDEC RG10 |
† Legend:
Name: Official designation
Vers: Numbered by sequential release
Year: Manufacture start/end
Description: General information
Displacement: cuin (cc)
Bore and Stroke: mm
Type: G=Glow, S=Spark
Plug: Thread diameter (Imperial fraction or mm)
Timer: Enclosed or Open (Spark only)
L/R: Exhaust Left/Right
Ind: Induction type FRV=Front Rotary Valve; RDV=Rear Disc Valve
Weight: grammes (oz)
H: Number of mounting holes
C: Casting type D=die cast; S=sand
Equivalents: Similar contemporary products
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