they have small cylinder and they also fire at every second stroke.
Automobiles, motorcycles, outboard motors and generators/small engines. That list may not be complete.
A list of all engines used in Mercedes-Benz vehicles can be found on the Wikipedia website. Starting in 1931, this list includes gas and diesel engines and inline and v cut engines as well. There are also listings for bus and truck engines for commercial vehicles.
List the reasons for sampling
Google.com
Crawler based search engines such as google .com HUman powered directories and Hybrid search engines
I posted the list of search engines from wikipedia in the related links box below.
BlingoDeeperWebExciteHarvester42HotBotInfo.comIxquickKayakMammaMetacrawlerMobissimoOtaloSideStepWebCrawler
Www.utoGuide.com has a list of the top ten most fuel efficient pickup trucks for 2013. Www.shopautoweek.com also has a list of its top four most fuel efficient pickup trucks.
You can find information on small homes at websites such as Zillow, Realtor, and Small Town Homes. You can also find a list of reasons why you should purchase a small house on the real estate section of the MSN website.
A very small list would include lack of air, dealing with direct sunlight, and weight vs. thrust of the spacecraft and its engines.
There are several places you can look online to find a list of the most fuel efficient cars. Check FuelEconomy.gov, they have a pretty extensive list. CNN recently did a story on the eight most fuel efficient cars. Check out their report.
yahoo, google, safari