---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Sun 02/09/20: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:27 AM - Re: Fuel flow markings (Carlos Trigo) 2. 08:38 AM - Re: Fuel flow markings (Phil Perry) 3. 01:22 PM - Re: Fuel flow markings (Carlos Trigo) 4. 03:38 PM - Re: Fuel flow markings (Kelly McMullen) ________________________________ Message 1 _____________________________________ Time: 01:27:16 AM PST US From: Carlos Trigo Subject: Re: RV10-List: Fuel flow markings Thank you Robert and Kelly Anyone else has numbers? Carlos Enviado do meu iPhone > No dia 09/02/2020, =C3-s 03:20, Robert Jones esc reveu: > > =EF=BBSorry, I have a Barrett Precision BPE540-X that has 9-1 pistons a nd cold air induction. Barrett rated it at 290 hp. A stock engine would have lower fuel flow. > > Robert Jones > >>> On Feb 8, 2020, at 17:55, Kelly McMullen wrote: >>> >> =EF=BB >> Hmm, that is awful high fuel flow for takeoff. I rarely see over 24.5 wit h Bendix RSA fuel injection., with stock compression and magnetos. >> Pretty good rule of thumb is 9-9.5 gph per 100 hp. 27 gph at takeoff is a number usually associated with close to 300 hp. >> At idle I will be under 3 gph.. >> Sent from my TRS-80 Model 100 >> >> >>> On Sat, Feb 8, 2020 at 6:24 PM Robert Jones wrot e: >>> >>> Red Lower 0-3.5 >>> Green 3.5-28.5 >>> Yellow 28.5-30 >>> Red 30 >>> >>> That should get you started. I have an Airflow Performance FM 300. Idle c an dip below 4 and Takeoff Power can hit 28.5. >>> >>> Robert Jones >>> >>> > On Feb 8, 2020, at 09:37, Carlos Trigo wrote: >>> > epac.pt> >>> > >>> > Guys >>> > >>> > I am now making the final configurations of my EFIS, and one of them i s the Fuel Flow. >>> > For those of you who also have an RV-10 with Lycoming IO-540 engine an d C/S prop, will you please share your fuel flow markings, >>> > >>> > Red (lower) range 0 - x gal/h >>> > Yellow (lower) range x - y gal/h >>> > Green range y - z gal/h >>> > Yellow (upper) range z - w gal/h >>> > Red (upper) range w - t gal/h >>> > >>> > Thanks in advance >>> > Carlos >>> > >>> > >>> > >>> > >>> > >>> > >>> > >>> >>> ========== >>> br> fts!) >>> r> > rel="noreferrer" target="_blank">http://www.matronics.com/contr ibution >>> -Matt Dralle, List Admin. >>> ========== >>> -List" rel="noreferrer" target="_blank">http://www.matronics.com/Nav igator?RV10-List >>> ========== >>> FORUMS - >>> eferrer" target="_blank">http://forums.matronics.com >>> ========== >>> WIKI - >>> errer" target="_blank">http://wiki.matronics.com >>> ========== >>> b Site - >>> -Matt Dralle, List Admin. >>> rel="noreferrer" target="_blank">http://www.matronics.com/contributi on >>> ========== >>> >>> >>> ________________________________ Message 2 _____________________________________ Time: 08:38:24 AM PST US From: Phil Perry Subject: Re: RV10-List: Fuel flow markings The don=99t have them marked at all. Fuel flows range too much from i dle to take off power and the last thing I want is an alarm or nagging yello w left flashing alert on the panel. It might be 2gph at idle. 25 on take off. Or anywhere in between. You ev entually learn where the fuel flow needs to be and if it jives with your pow er setting/egt=99s. So there is no such thing as a fuel flow band in my airplane because there a re far too many variables to say any band is the right band. Now fuel pressure? That=99s a different thing. When fuel pressure b egins to drop, I want to know immediately. PhI=99m Sent from my iPhone > On Feb 9, 2020, at 3:31 AM, Carlos Trigo wrote: > > =EF=BBThank you Robert and Kelly > > Anyone else has numbers? > > Carlos > > Enviado do meu iPhone > >> No dia 09/02/2020, =C3-s 03:20, Robert Jones es creveu: >> >> =EF=BBSorry, I have a Barrett Precision BPE540-X that has 9-1 pistons a nd cold air induction. Barrett rated it at 290 hp. A stock engine would have lower fuel flow. >> >> Robert Jones >> >>>> On Feb 8, 2020, at 17:55, Kelly McMullen wrote: >>>> >>> =EF=BB >>> Hmm, that is awful high fuel flow for takeoff. I rarely see over 24.5 wi th Bendix RSA fuel injection., with stock compression and magnetos. >>> Pretty good rule of thumb is 9-9.5 gph per 100 hp. 27 gph at takeoff is a number usually associated with close to 300 hp. >>> At idle I will be under 3 gph.. >>> Sent from my TRS-80 Model 100 >>> >>> >>>> On Sat, Feb 8, 2020 at 6:24 PM Robert Jones wro te: >>>> >>>> Red Lower 0-3.5 >>>> Green 3.5-28.5 >>>> Yellow 28.5-30 >>>> Red 30 >>>> >>>> That should get you started. I have an Airflow Performance FM 300. Idle can dip below 4 and Takeoff Power can hit 28.5. >>>> >>>> Robert Jones >>>> >>>> > On Feb 8, 2020, at 09:37, Carlos Trigo wrote: >>>> > lepac.pt> >>>> > >>>> > Guys >>>> > >>>> > I am now making the final configurations of my EFIS, and one of them i s the Fuel Flow. >>>> > For those of you who also have an RV-10 with Lycoming IO-540 engine a nd C/S prop, will you please share your fuel flow markings, >>>> > >>>> > Red (lower) range 0 - x gal/h >>>> > Yellow (lower) range x - y gal/h >>>> > Green range y - z gal/h >>>> > Yellow (upper) range z - w gal/h >>>> > Red (upper) range w - t gal/h >>>> > >>>> > Thanks in advance >>>> > Carlos >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> >>>> ========== >>>> br> fts!) >>>> r> > rel="noreferrer" target="_blank">http://www.matronics.com/cont ribution >>>> -Matt Dralle, List Admin. >>>> ========== >>>> -List" rel="noreferrer" target="_blank">http://www.matronics.com/Na vigator?RV10-List >>>> ========== >>>> FORUMS - >>>> eferrer" target="_blank">http://forums.matronics.com >>>> ========== >>>> WIKI - >>>> errer" target="_blank">http://wiki.matronics.com >>>> ========== >>>> b Site - >>>> -Matt Dralle, List Admin. >>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribut ion >>>> ========== >>>> >>>> >>>> ________________________________ Message 3 _____________________________________ Time: 01:22:20 PM PST US From: Carlos Trigo Subject: Re: RV10-List: Fuel flow markings Phil In that case, which are your markings for the fuel pressure? Carlos Enviado do meu iPhone > No dia 09/02/2020, =C3-s 16:44, Phil Perry escrev eu: > > =EF=BBThe don=99t have them marked at all. Fuel flows range too m uch from idle to take off power and the last thing I want is an alarm or nag ging yellow left flashing alert on the panel. > > It might be 2gph at idle. 25 on take off. Or anywhere in between. You e ventually learn where the fuel flow needs to be and if it jives with your po wer setting/egt=99s. > > So there is no such thing as a fuel flow band in my airplane because there are far too many variables to say any band is the right band. > > Now fuel pressure? That=99s a different thing. When fuel pressure begins to drop, I want to know immediately. > > PhI=99m > > > Sent from my iPhone > >>> On Feb 9, 2020, at 3:31 AM, Carlos Trigo wrote: >>> >> =EF=BBThank you Robert and Kelly >> >> Anyone else has numbers? >> >> Carlos >> >> Enviado do meu iPhone >> >>> No dia 09/02/2020, =C3-s 03:20, Robert Jones e screveu: >>> >>> =EF=BBSorry, I have a Barrett Precision BPE540-X that has 9-1 pistons and cold air induction. Barrett rated it at 290 hp. A stock engine would ha ve lower fuel flow. >>> >>> Robert Jones >>> >>>>> On Feb 8, 2020, at 17:55, Kelly McMullen wrote: >>>>> >>>> =EF=BB >>>> Hmm, that is awful high fuel flow for takeoff. I rarely see over 24.5 w ith Bendix RSA fuel injection., with stock compression and magnetos. >>>> Pretty good rule of thumb is 9-9.5 gph per 100 hp. 27 gph at takeoff is a number usually associated with close to 300 hp. >>>> At idle I will be under 3 gph.. >>>> Sent from my TRS-80 Model 100 >>>> >>>> >>>>> On Sat, Feb 8, 2020 at 6:24 PM Robert Jones wr ote: >>>>> >>>>> Red Lower 0-3.5 >>>>> Green 3.5-28.5 >>>>> Yellow 28.5-30 >>>>> Red 30 >>>>> >>>>> That should get you started. I have an Airflow Performance FM 300. Idl e can dip below 4 and Takeoff Power can hit 28.5. >>>>> >>>>> Robert Jones >>>>> >>>>> > On Feb 8, 2020, at 09:37, Carlos Trigo wrote : >>>>> > elepac.pt> >>>>> > >>>>> > Guys >>>>> > >>>>> > I am now making the final configurations of my EFIS, and one of them is the Fuel Flow. >>>>> > For those of you who also have an RV-10 with Lycoming IO-540 engine a nd C/S prop, will you please share your fuel flow markings, >>>>> > >>>>> > Red (lower) range 0 - x gal/h >>>>> > Yellow (lower) range x - y gal/h >>>>> > Green range y - z gal/h >>>>> > Yellow (upper) range z - w gal/h >>>>> > Red (upper) range w - t gal/h >>>>> > >>>>> > Thanks in advance >>>>> > Carlos >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> > >>>>> >>>>> ========== >>>>> br> fts!) >>>>> r> > rel="noreferrer" target="_blank">http://www.matronics.com/con tribution >>>>> -Matt Dralle, List Admin. >>>>> ========== >>>>> -List" rel="noreferrer" target="_blank">http://www.matronics.com/N avigator?RV10-List >>>>> ========== >>>>> FORUMS - >>>>> eferrer" target="_blank">http://forums.matronics.com >>>>> ========== >>>>> WIKI - >>>>> errer" target="_blank">http://wiki.matronics.com >>>>> ========== >>>>> b Site - >>>>> -Matt Dralle, List Admin. >>>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribu tion >>>>> ========== >>>>> >>>>> >>>>> ________________________________ Message 4 _____________________________________ Time: 03:38:26 PM PST US From: Kelly McMullen Subject: Re: RV10-List: Fuel flow markings I don't know what Phil has. I know that the mechanical pump had limits until about 5 years ago, which was 15 psi minimum, 30 psi maximum. Later production pumps may put out more than 30 psi, perhaps as much as 35 psi. It causes a problem for type certificated aircraft where the instrument markings are airworthiness limitations and were based on Lycoming's previous production limits. Typical, cruise pump pressure is going to be in the mid-twenties. While there are reports of the engine continuing to run okay on less than 15 psi, there are no guarantees. Sent from my TRS-80 Model 100 On Sun, Feb 9, 2020 at 2:26 PM Carlos Trigo wrote: > Phil > > In that case, which are your markings for the fuel pressure? > > Carlos > > Enviado do meu iPhone > > No dia 09/02/2020, =C3-s 16:44, Phil Perry escre veu: > > =EF=BBThe don=99t have them marked at all. Fuel flows range too much from idle > to take off power and the last thing I want is an alarm or nagging yellow > left flashing alert on the panel. > > It might be 2gph at idle. 25 on take off. Or anywhere in between. You > eventually learn where the fuel flow needs to be and if it jives with you r > power setting/egt=99s. > > So there is no such thing as a fuel flow band in my airplane because ther e > are far too many variables to say any band is the right band. > > Now fuel pressure? That=99s a different thing. When fuel pressur e begins > to drop, I want to know immediately. > > PhI=99m > > > Sent from my iPhone > > On Feb 9, 2020, at 3:31 AM, Carlos Trigo wrote: > > =EF=BBThank you Robert and Kelly > > Anyone else has numbers? > > Carlos > > Enviado do meu iPhone > > No dia 09/02/2020, =C3-s 03:20, Robert Jones > escreveu: > > =EF=BBSorry, I have a Barrett Precision BPE540-X that has 9-1 pistons and cold > air induction. Barrett rated it at 290 hp. A stock engine would have lowe r > fuel flow. > > Robert Jones > > On Feb 8, 2020, at 17:55, Kelly McMullen wrote: > > =EF=BB > Hmm, that is awful high fuel flow for takeoff. I rarely see over 24.5 wit h > Bendix RSA fuel injection., with stock compression and magnetos. > Pretty good rule of thumb is 9-9.5 gph per 100 hp. 27 gph at takeoff is a > number usually associated with close to 300 hp. > At idle I will be under 3 gph.. > > Sent from my TRS-80 Model 100 > > > On Sat, Feb 8, 2020 at 6:24 PM Robert Jones wrote : > >> >> Red Lower 0-3.5 >> Green 3.5-28.5 >> Yellow 28.5-30 >> Red 30 >> >> That should get you started. I have an Airflow Performance FM 300. Idle >> can dip below 4 and Takeoff Power can hit 28.5. >> >> Robert Jones >> >> > On Feb 8, 2020, at 09:37, Carlos Trigo wrote: >> > epac.pt> >> > >> > Guys >> > >> > I am now making the final configurations of my EFIS, and one of them i s >> the Fuel Flow. >> > For those of you who also have an RV-10 with Lycoming IO-540 engine an d >> C/S prop, will you please share your fuel flow markings, >> > >> > Red (lower) range 0 - x gal/h >> > Yellow (lower) range x - y gal/h >> > Green range y - z gal/h >> > Yellow (upper) range z - w gal/h >> > Red (upper) range w - t gal/h >> > >> > Thanks in advance >> > Carlos >> > >> > >> > >> > >> > >> > >> > >> >> ========== >> br> fts!) >> r> > rel="noreferrer" target="_blank"> >> http://www.matronics.com/contribution >> -Matt Dralle, List Admin. >> ========== >> -List" rel="noreferrer" target="_blank"> >> http://www.matronics.com/Navigator?RV10-List >> ========== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contributi on >> ========== >> >> >> >> ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv10-list Browse Digests http://www.matronics.com/digest/rv10-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.