Ues STABLE and porge the carb float bow, Virg On Mon, 17 Oct 2005 10:07:37 -0400 "Colin Rainey" <brokerpilot9...@earthlink.net> writes: > Netters need to be aware that alot of people talk about what their > engine does in one statement when they are actually covering several > different factors. People will advertise an economy of so many > gallons an hour, while cruising at a high cruise speed. Then in > practice actual builder/owners report the speed is achieved but not > the economy at that speed. Example: a Corvair engine can cruise at > 3 to 4 gallons an hour just like the VW, and can push the KR up to > speeds of 150 to 180 mph. But to say it can cruise at 170 mph at 3 > gallons an hour is not over exaggerating, it is a lie! It can do > one, or the other but not both at the same time. My VW would use > almost 3.5 gallons and hour all the time, due to restricted time in > climb, and lots of time in cruise testing. But it never got over > 140 mph, and would cruise at 125 mph. Talk to actual aircraft > owners who are NOT selling their plane for accurate reports of the > engine in question. Also something to keep in mind about Subaru > engines that no one has mentioned yet is, most have timing belts. > They are difficult to change due to the amount of engine assemblies > that must be removed to get to it (less for the plane version). > They are also INTERFERENCE engines. This means that when the belt > breaks, you have valve damage for sure. A bad day got worse. The > Corvair is gear drive, like the VW and the GM 4.3 V6 is chain drive. > I could go on, but I think all see my point about doing your > research and not getting sucked in to advertising. > Remember, if it was such a Chariot/cream puff, why is he/she selling > it! > > Also make sure that you check on the CONTINUOUS rated hp for the > engine desired and its rpm, not just peak numbers. 2 cycles make > good hp, but have to run in the top part of their designed rpms to > make any significant hp at all. This will have a big impact on the > PSRU/Prop you use. > > Pump gas is good, but remember it has alcohol in it which absorbs > water. Also it will gum up a carb if left parked for extensive > periods of time. I would suggest a diet of premium gas for regular > running, but top up to park it on 100LL, and make sure that the > 100LL is in the carb when at rest/parked, unless you are flying at > least every 3 to 4 days. Otherwise, if it sits parked for a month > or two due to personal scheduling, the carb is going to start > getting this lacquer like brown/gold film in it from the pump gas, > and you will have to re-build it prematurely. You will also > periodically have to add a gas treatment to absorb any water that > you do not get sumped off. > > > Colin Rainey > brokerpilot9...@earthlink.net > EarthLink Revolves Around You. > _______________________________________ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > >
Virgil N. Salisbury - AMSOIL www.lubedealer.com/salisbury Miami ,Fl
