Brodhead Pietenpol Association

Original Posted By: "Harvey Plummer"
Grounding while fueling is a subject of interest to me. My last BFR was flownin a beautiful and brand-new C-172 with leather upholstery and all the options,that probably has as many dollars invested in the glass panel as in the entirerest of the airplane. I have never flown anything like it before or since.It belonged to a very high-time and competent pilot and instructor who had formany years owned and operated an FBO. When we pulled it up to the pump tofuel it up, he pshaw'd the notion of bothering with the grounding cable and clamp,saying that he had never heard of a fire caused by not grounding the airplanewhile refueling. OK... it's his plane.When I pull my Air Camper to the pump, I usually clamp the grounding clamp ontothe open end of the exhaust stack, figuring that the stack is solidly boltedto the engine and the engine is grounded to the metal firewall through a braidedstrap that I installed myself for just that purpose. Everything of interestto me (no electrics on my plane) uses the firewall as the common grounding reference.The P-lead shields land on the same grounding bus on the firewall.The welded aluminum fuel tank on Scout is not grounded to the common groundingpoint, so it may really not do a lot of good to clamp the fueling ground cableto my exhaust stack unless I trace my way back, metal-to-metal, through the carbmounting studs to the carb and then to the metal AN fuel line fitting to thebraided jacket on the fuel line to the metal gascolator, to the metal mountof the gascolator to the firewall. It might be a good path and it might not,and I can test it with an ohmmeter, but it would sure be easy to make a directpath by installing a piece of ground braid directly from the tank to the firewallgrounding bus. I know that there are already plenty of things to worryabout without over-thinking the grounding issue, but it's food for thought. Flowingfluid does create a static charge, and as the girl on Hee-Haw used to say,"and that's a fact!"--------Oscar ZunigaMedford, ORAir Camper NX41CC "Scout"A75 powerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Corvair Fuel Burn

Original Posted By: "j_dunavin"
Thank you iPhone users for waiting out the IOS 9 upgrade while the Airport CourtesyCar app was down. The app is back up for all users and the layout and lookof the app has been upgraded also. The listings continue to grow, currentlyat over 1,520, and approaches 25,000 launches. Please continue to send in listingsI have missed or corrections that need to be made and I will get right onthem. And if you use and like the app, please consider a small donation to helpwith expenses, even the tip that you leave on the lunch counter is appreciated.There are PayPal links on the app, and my mailing address is also listedwithin the app. Glenn--------Glenn BraschRV-9A Flying1952 Piper Tri-PacerMedevac Helicopter Pilot (Ret)Tucson, ArizonaOwner, "Airport Courtesy Cars" Smart Phone App.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: "jarheadpilot82"
I believe that it's around 5.5 gph.Rpm will vary on propeller choice.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: "tkreiner"
Ken,If you are truly interested, give me a call. My dad continually says he will sellbut i haven't got anyone seriously interested in it yet. When I find that personI will put them in touch with dad. I am kinda filtering the inquiries. 661 400 1876--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: "tkreiner"
Generally speaking, an aircooled Aicraft engine will consumeRoughly 0.5 lb/Hp-hr of fuel. Example : 100 Hp Corvair OR Continental will consume about 5.0 gal / hour. Your mileage may vary...--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: "Harvey Plummer"
Uh...Make that 0.5 gal / Hp-hr...Thanks for pointing out the error in my units, Mike!--------Tom KreinerRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: Kip Gardner
Thanks for the info guys. I am planning to put my tank in front of Fuselage andwant to calculate how many gallons I will need.--------Harv, 485PBRead this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Re: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: Kip Gardner
Um, this still doesn't make sense to me:0.5 gal/hp/hr x 100hp = 50gal/hr? Am I missing something? I would think theburn should the be 0.05gal/hp/hr to get 5gph @ 100hp.Kip GardnerOn Oct 6, 2015, at 7:16 AM, tkreiner wrote:> > Uh...> > Make that 0.5 gal / Hp-hr...> > Thanks for pointing out the error in my units, Mike!> > --------> Tom Kreiner> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 715#447715> > > > > > > > > > ________________________________________________________________________________Subject: Re: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: Scott Knowlton
Um, this still doesn't make sense to me:0.5 gal/hp/hr x 100hp = 50gal/hr? Am I missing something? I would think theburn should the be 0.05gal/hp/hr to get 5gph @ 100hp.Kip GardnerOn Oct 6, 2015, at 7:16 AM, tkreiner wrote:> > Uh...> > Make that 0.5 gal / Hp-hr...> > Thanks for pointing out the error in my units, Mike!> > --------> Tom Kreiner> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 715#447715> > > > > > > > > > ________________________________________________________________________________Subject: Re: Pietenpol-List: Re: Corvair Fuel Burn

Original Posted By: Robert Gow
I believe the rule of thumb for thermal efficiency of aircraft engines fuel andhorsepower is .5lb/hp/hr which in the 100hp engine equals just over 8GPH (50pounds/6 pounds per gallon= 8.1). which makes sense since it only generates 100HPat full throttle at sea level and we would rarely operate in that window.Usually we are powered to 75% at cruise which would give the more reasonable5GPH. But don't quote me on any of the above. Scott Sent from my iPhone> On Oct 6, 2015, at 4:17 PM, "Kip Gardner" wrote:> > > Um, this still doesn't make sense to me:> > 0.5 gal/hp/hr x 100hp = 50gal/hr? Am I missing something? I would think theburn should the be 0.05gal/hp/hr to get 5gph @ 100hp.> > Kip Gardner> >> On Oct 6, 2015, at 7:16 AM, tkreiner wrote:>> >> >> Uh...>> >> Make that 0.5 gal / Hp-hr...>> >> Thanks for pointing out the error in my units, Mike!>> >> -------->> Tom Kreiner>> >> >> >> >> Read this topic online here:>> >> http://forums.matronics.com/viewtopic.p ... 715#447715> > > > > > ________________________________________________________________________________

Original Posted By: Kip Gardner
perhaps 0.5 lbs per hour. that is a typical specific consumption for a piston engine. Original Message

Original Posted By:> Kip Gardner
OK, that makes sense. Thanks.On Oct 6, 2015, at 5:44 PM, Robert Gow wrote:> > perhaps 0.5 lbs per hour. that is a typical specific consumption for a pistonengine.> > Original Message

Original Posted By:>> Kip Gardner
No need to hypothesize. I get right near 5gph....cruise at 2700. Admittedly, Ihave my timing backed off just a bit from the 32 deg max, so may be getting abit under 100hp.GarySent from my iPhone> On Oct 6, 2015, at 2:57 PM, Kip Gardner wrote:> > > OK, that makes sense. Thanks.> >> On Oct 6, 2015, at 5:44 PM, Robert Gow wrote:>> >> >> perhaps 0.5 lbs per hour. that is a typical specific consumption for a pistonengine.>> >> Original Message

Original Posted By: Robert Gow
Specific fuel consumption, as I remember it from Tech days so long ago, is measured in pounds per brake horsepower per hour. As mentioned by others, it usually is about 0.5 lbs./bhp/hr.Graham Hansen-----Original Message-----

Original Posted By: G Hansen
yes forgot to include the "per hp" term. Original Message