150HP Hisso V8

Do any of you Hotshots know what the fuel consumption is for this engine in gallons per hour?

 

No idea. But it probably uses 68 octane and splashes copious quantities of oil on your goggles. .

Just read up on it. Quite an engine. When standard acceptance testing was 15 hours at full power the round motor companies rebelled and insisted it be tested for 50 hours at full power. It passed. And it was lighter than rotaries of the same power.

 

Bob- The 150 HP Hisso was pretty early and mainly used in trainers here in the US, although it was used in the S.E.5 (not S.E.5a) and Spad VII C.1. Let me see what I can dig up.

The Wright-Martin Hispano Suiza Model 1 of 150 hp had a specific fuel consumption of 0.51 lbs per hp per hour. It also burned 0.03 lbs per hp per hour of oil.
Weight with airscrew was 455 lbs. Contemporary Clerget and Le Rhône rotaries weighed around 400 lbs and produced 110-140 hp.

From Jane's Fighting Aircraft or World War I

 

While not about the Hisso V-8 specifically, I recently finished this book about the Liberty Engine. The text goes into deep, deep detail about acceptance testing methods of that era. A well-researched and interesting read for those of us who like to geek-out on the topic...

https://www.amazon.com/Liberty-Engine-Technical-Operational-History/dp/158007149X/ref=sr_1_2?crid=3J4T554T0QXW4&dib=eyJ2IjoiMSJ9.08hI1AaKK-E4LfYmPHHZRCu9O5ykBW-Vo41fF7hKGxbcJhk8sGcYTUUvrpWP0WEcY4K0EdTBIoXutnPyvOzuFgVylLVN-wdJjZZX3HUqBafs5TZjf-J_cQhEsDNMAC9MJa3b2i1u5vl15uoFjgI28E4Utv8CGDeUFcafZMpnIkm91JIOWoWDqKbKFTekPYO9Lmx4f8ijFEge2UuRySFtCh9toiacZYBuFHEW6ezTT3w.tunbJ7rwotYmMzhUgIhjXf-5EXR7-zF9PJQu-FMsJ1w&dib_tag=se&keywords=Liberty+engine&qid=1712339609&s=books&sprefix=liberty+engi%2Cstripbooks%2C167&sr=1-2

 

That engine is often referred to as the original US military procurement scam.

 

Yessir! But it did lay the foundation for the United States to become the greatest aerospace manufacturing powerhouse the world had ever seen. Which directly led to the Allied victories in WWII and the Cold War. That was before the days of DEI, but I digress....