Hope Engines Summary Table

Compiled by Adrian Duncan and Alan Strutt

NameModelYearDescriptionDispBoreStrokeTypePlugTimerL/RIndWeightHolesD/SEquivalents †
Hope .091st1955-1957Conventional 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)
12.712.7G1/4"N/ALFRV50
(1.75)
4DENYA 09 #3001
FUJI .099
K&B GR'HEAD 09
K.O. .099
HOPE 191st1949-1950Hope'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)
1615.5G1/4"N/ALFRV161
(5.70)
4SAMCO 3.5 GLOW
K.O. 19
McCOY 19 RV
2nd1950-1951Basically 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)
1616G1/4"N/ALFRV147
(5.20)
4DDC 350 G
ENYA 19
MAMIYA 19
McCOY 19 STUNT
3rd1951-1952Almost 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)
1616G1/4"N/ALFRV147
(5.20)
4DDC 350 G ENYA 19
MAMIYA 19
McCOY 19 STUNT
4th1952-1953Once 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)
1616G1/4"N/ALFRVN/K4DENYA 19
FUJI 19
MAMIYA 19
HOPE SUPER 191st1953-1957Revised 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)
1616G1/4"N/ALFRV145
(5.10)
4DENYA 19 #4002
FOX 19 SPLITCASE
K&B GRNHEAD 19
HOPE B1st1947 onlyHope'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)
17.919.2S3/8"ENCRFRV193
(6.8)
4SFORSTER 29 RV
K&B TORP. 29
OK 29-B
O&R 29
2nd1947-1948Similar 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)
17.919.2S3/8"ENCRFRV193
(6.8)
4SOK SUPER 29
TORP. SPECIAL
3rd1948-1949As 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)
17.919.2G3/8"N/ARFRV184
(6.5)
4SK VULTURE
K&B GLO-TORP 29
McCOY 29 RV
OK HOTHEAD
YULON 30
4th1949 onlyAs 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)
17.919.2G1/4"N/ARFRV184
(6.5)
4SFOX 29 STUNT
FROG 500 Mk. I
FUJI 29 FRV
K&B 29
O.S. 29
YULON 29
K.O. 29
HOPE NEW 291st1950 onlyShort-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)
18.518G1/4"N/ALFRV193
(6.8)
4DAs above.
2nd1950-1952As above, but all known examples featured aluminium alloy castings throughout and had a far stronger con-rod and crankshaft.4.84
(.295)
18.518G1/4"N/ALFRV193
(6.8)
4DFORSTER G29
FUJI 29 RV
MAMIYA 29 FRV
O.S. NEW 29
3rd1952-1953Identical 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)
18.518G1/4"N/ALFRV193
(6.8)
4DENYA 29
FORSTER F29
FUJI 29 S/A
HOPE SUPER 291st1953-1957Completely 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)
1917G1/4"N/ALFRV177
(6.25)
4DENYA 29 #5002
FROG 500 Mk. II
O.S. MAX-I 29
VECO 29 TCC
SUPER HOPE 601st1948-1949Very limited production racing design, most likely constructed more for prestige purposes than anything else. Extremely well made. Lapped cast-iron piston.9.72
(.593)
23.522.4S10mmOPENLRDV379
(13.37)
4SMAMIYA 60
McCOY 60 RHBC
NORDEC R10
SUPER DEVIL 60
2nd1948-1949Glow-plug ignition version of the above model, equally well made.9.72
(.593)
23.522.4GN/ALRDV351/12.384SENYA 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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