Well, Donald I might have been misunderstood. I mean primer directly in the intake, almost onto the intake valve.
So it is still in the intake part of every each cylinder. I think the big fuel injected 6 cylinder continentals are using such a system. Hartmut To: [email protected] From: [email protected] Date: Mon, 18 Jan 2010 16:53:15 +0000 Subject: [ercoupe-tech] Re: flying on primer? PRIMER PUMP LESSON I am unaware of any engine where the primer injects fuel directly into the combustion chamber, this would be difficult to safely accomplish. Can someone explain how this is done and on which engine? .--- In [email protected], Hartmut Beil <hb...@...> wrote: > > > Dave. > > > > The primer is directed into the spider above the carburetor. So there is one > measure to not flood the carburetor directly. > > Second. The primer nozzle that I checked out ones, created a very fine mist , > so fine that it would not settle that easy onto the carburetor. > > I think this is a good design. > > Yes for the purpose of starting a fuel injected engine, you want the primer > spray directly into the cylinder. > > > > But our primer just mimics the carburetor function and has the safety backup > feature that you can use it in case of carburetor trouble. > > > > Problem is to remember to use the primer in such event. It can get very > exiting when it gets quieter and quieter in front of you. > > > > By the way, I believe Kim's engine might have had a malfunctioning > lifter/valve combination that interrupted the breathing capability of the > engine. The primer would have been of little help here. > > > > But then, I have not been there. > > > > > > Hartmut > > > > To: c.d.gu...@...; [email protected] > From: ronin_sen...@... > Date: Mon, 18 Jan 2010 16:13:48 +0000 > Subject: RE: [ercoupe-tech] flying on primer? PRIMER PUMP LESSON > > > > > > My frustrating primer pump lesson: > I learned to fly 30 years ago, and have all the foundation commercial > tickets. Flown all sort of planes, including jets. > I my "pre-Coupe" experience, primers always shot fuel DIRECTLY INTO THE > CYLINDERS (or, at least, into ONE cylinder). This was an important feature, > because, that way, one could not get a carb fire from priming the engine. > (Some folks just use the accelerator pump to prime the engine before > starting, but that causes significant risk of fire by flooding the carb and > dripping out.) > > When I bought my Coupe, it had the primer disconnected and crimped off. But, > I wanted greater safety margin on start-up, so, at last annual, I had it > re-installed. That was when I discovered that the Coupe primer does NOT > bypass the carburator like every design I had ever seen previously. The Coupe > primer shoots fuel into the carburator. This left me a bit non-plussed > because it seemed to create a greater probably of fire on start-up. > Furthermore, if there is a carb problem, it could keep me from running the > engine on primer, alone. > > However, it DOES have the added benefit of more evenly feeding ALL the > cylinders. So, I think the plane could still fly while I pump away on the > primer. My guess is that the WII birds were all of the same design as my > Coupe, in that respect, since they are of the same generation. Their primers > probably pumped fuel into the carb. > > Dave Winters > > > To: [email protected] > From: c.d.gu...@... > Date: Sat, 16 Jan 2010 02:01:57 +0000 > Subject: RE: [ercoupe-tech] flying on primer? > > > > > > > Yes, this can be done. One of the pilots at our airport did this for 15-20 > miles to get back to the airport. It turns out the floating cork fuel > indicator was slowly disintigrating and clogging up a strainer/filter. This > was not on an Ercoupe but another old plane with a similar fuel supply > set-up. This is what you may call common knowledge at our small grass > airstrip, where there is a lot of hangar flying during the weekends. We pass > around a lot of flying knowledge just in the normal course of a day, visiting > with other pilots and I'm sure this is well known with a lot of pilots. > Darick > > ----- Original Message ----- > From: jthomaste...@... > To: "Jerry Eichenberger" <jeichenber...@...>, "Ed Burkhead" <e...@...>, "ety > Ercoupe" <[email protected]> > Sent: Friday, January 15, 2010 4:31:29 PM GMT -05:00 US/Canada Eastern > Subject: Re: SPAM-LOW: RE: [ercoupe-tech] flying on primer? > > > > > Mine goes into the bottom of the spider, just above the > carb. > > Tommy > > On Fri, 15 Jan 2010 16:41:51 -0500 > "Jerry Eichenberger" <jeichenber...@...> > wrote: > >Ed - > > > >Forgive my ignorance, but does the normal primer plumbing > >supply fuel to all > >cylinders, or fewer than all? > > > >Jerry E. > > -----Original Message----- > > From: [email protected] > >[mailto:[email protected]]on > >Behalf Of Ed Burkhead > > Sent: Friday, January 15, 2010 4:13 PM > > To: 'ety Ercoupe' > > Subject: SPAM-LOW: RE: [ercoupe-tech] flying on primer? > > > > > > > > > > > Ed, would you please spell this out some (lots!) > >more? I > > > have never heard of flying on the primer before, and > >would > > > like to know how it's done. I thought the primer just > >puts > > > out a squirt of fuel... > > > > If the engine is windmilling or starving for fuel (carb > >problems, fuel > > line problems, clogged tank screen, clogged fuel > >filter, whatever), you > > need fuel to the engine. > > > > If it seems the engine might not be getting fuel > >otherwise, you pull the > > primer out and slowly push it in. I don't know how fast > >you would push > > it in for optimum (or acceptable) use. I just know that > >if fuel > > starvation is the problem, it's sometimes possible to > >keep the engine > > going, mostly, enough to fly level and get to a > >tolerable emergency > > landing spot. > > > > I remember a story about a WW2 fighter pilot who had > >something in his > > engine shot away. He flew from occupied Europe back to > >England on the > > primer, pumping it and pumping it. > > > > If there's fuel in the header tank and it can get from > >the tank to the > > primer intake, then the primer circuit bypasses the > >rest of the fuel > > system to the engine. > > > > Anyone who has personal experience with this, please > >chime in and tell > > us of your experience. > > > > Ed > > > > > > Your E-mail and More On-the-Go. Get Windows Live Hotmail Free. Sign up now. > > > > > __________________________________________________________ > Windows Live: Friends get your Flickr, Yelp, and Digg updates when they > e-mail you. > http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/social-network-basics.aspx?ocid=PID23461::T:WLMTAGL:ON:WL:en-xm:SI_SB_3:092010 > _________________________________________________________________ Windows Live: Keep your friends up to date with what you do online. http://www.microsoft.com/middleeast/windows/windowslive/see-it-in-action/social-network-basics.aspx?ocid=PID23461::T:WLMTAGL:ON:WL:en-xm:SI_SB_1:092010
