---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Mon 04/28/08: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:44 AM - Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (Matt Dralle) 2. 12:46 PM - Re: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (Bill Gunn) 3. 12:56 PM - Re: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (Matt Dralle) 4. 01:22 PM - Re: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (Bill Gunn) 5. 03:32 PM - Re: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (JFLEISC@aol.com) 6. 06:07 PM - Re: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel (JAMES HITTERMAN) ________________________________ Message 1 _____________________________________ Time: 11:44:44 AM PST US From: Matt Dralle Subject: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel Hello RV Listers! Well, after quite a hiatus, I'm back on my RV-4 project. This year marks the 20th year since its beginning, and I'm thinking that that its time finally see it to completion! The options have changed quite a bit since I started the project, and the latest iteration has a 180HP and a Hartzell CS prop. I had already mounted the battery in the normal spot up by the firewall between the pilot's legs. With all the extra weight up front, I'm sure I'll have to relocate the battery behind the cabin somewhere. Of note, however, is that I have electric trim installed in the Elevator, and the full-swivel tailwheel fork, both of which add some weight to the far aft location. I would appreciate some feedback on selecting an exacting location for the battery given my situation. Also, what gauge battery cables to use given the remote location. Its great to be back on the project; I'm looking forward to getting back into the discussions on the List! Thanks for the help! Matt Dralle RV-4 #1762 - N442RV (res) Matronics List Administrator ________________________________ Message 2 _____________________________________ Time: 12:46:24 PM PST US From: "Bill Gunn" Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel Matt - I replace an 0-320 & F/P wooden prop with an 0-360 & Hartzell C/S. On advise of Van's, I left the battery where it was & find the CG is fine - mine is 67.16 aft of datum @ 1030 Lbs. empty. Originally it was 70.03 @ 916 Lbs. with the 0-320 & F/P prop. N252MD, 2160 hours. Bill Gunn, TxDOT Aviation Division >>> Matt Dralle 4/28/2008 1:41 PM >>> Hello RV Listers! Well, after quite a hiatus, I'm back on my RV-4 project. This year marks the 20th year since its beginning, and I'm thinking that that its time finally see it to completion! The options have changed quite a bit since I started the project, and the latest iteration has a 180HP and a Hartzell CS prop. I had already mounted the battery in the normal spot up by the firewall between the pilot's legs. With all the extra weight up front, I'm sure I'll have to relocate the battery behind the cabin somewhere. Of note, however, is that I have electric trim installed in the Elevator, and the full-swivel tailwheel fork, both of which add some weight to the far aft location. I would appreciate some feedback on selecting an exacting location for the battery given my situation. Also, what gauge battery cables to use given the remote location. Its great to be back on the project; I'm looking forward to getting back into the discussions on the List! Thanks for the help! Matt Dralle RV-4 #1762 - N442RV (res) Matronics List Administrator ________________________________ Message 3 _____________________________________ Time: 12:56:43 PM PST US From: Matt Dralle Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel Well, that's good new, Bill. I was kind of bummed 'cause I had all the holes drilled and dimpled already for the front location. So what can you say about the performance of the 320/FP vs. 360/CS on the exact same RV-4? That's definitely an "all things being equal" example. I'm very curious to hear if all the extra who-ha is worth it (oh, and the extra $20k...) Matt At 12:42 PM 4/28/2008 Monday, you wrote: > >Matt - I replace an 0-320 & F/P wooden prop with an 0-360 & Hartzell C/S. On advise of Van's, I left the battery where it was & find the CG is fine - mine is 67.16 aft of datum @ 1030 Lbs. empty. Originally it was 70.03 @ 916 Lbs. with the 0-320 & F/P prop. N252MD, 2160 hours. > >Bill Gunn, TxDOT Aviation Division > > >The options have changed quite a bit since I started the project, and the latest iteration has a 180HP and a Hartzell CS prop. I had already mounted the battery in the normal spot up by the firewall between the pilot's legs. With all the extra weight up front, I'm sure I'll have to relocate the battery behind the cabin somewhere. Of note, however, is that I have electric trim installed in the Elevator, and the full-swivel tailwheel fork, both of which add some weight to the far aft location. > >I would appreciate some feedback on selecting an exacting location for the battery given my situation. Also, what gauge battery cables to use given the remote location. > >Its great to be back on the project; I'm looking forward to getting back into the discussions on the List! > >Thanks for the help! > >Matt Dralle >RV-4 #1762 - N442RV (res) >Matronics List Administrator Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft ________________________________ Message 4 _____________________________________ Time: 01:22:27 PM PST US From: "Bill Gunn" Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel It is to me - and that is the most definitive statement I can make. I fly the #2 slot with Falcon Flight & needed the power and control. I find the fuel burn slightly lower at 65% or less at 9000 to 13000 density altitude - about 7.5 to 8.4 GPH - electronic (Electoair) ignition really helps here; I have had it on for 1500 hours. Attached is my home made (but reasonably accurate) performance chart. The "Pwr@ 2300 RPM" is the MP + 23 = the value shown. Climb is enhanced & the C/S prop really is an excellent speed brake when you need it. Bill Gunn, TxDOT Aviation Division >>> Matt Dralle 4/28/2008 2:53 PM >>> Well, that's good new, Bill. I was kind of bummed 'cause I had all the holes drilled and dimpled already for the front location. So what can you say about the performance of the 320/FP vs. 360/CS on the exact same RV-4? That's definitely an "all things being equal" example. I'm very curious to hear if all the extra who-ha is worth it (oh, and the extra $20k...) Matt At 12:42 PM 4/28/2008 Monday, you wrote: > >Matt - I replace an 0-320 & F/P wooden prop with an 0-360 & Hartzell C/S. On advise of Van's, I left the battery where it was & find the CG is fine - mine is 67.16 aft of datum @ 1030 Lbs. empty. Originally it was 70.03 @ 916 Lbs. with the 0-320 & F/P prop. N252MD, 2160 hours. > >Bill Gunn, TxDOT Aviation Division > > >The options have changed quite a bit since I started the project, and the latest iteration has a 180HP and a Hartzell CS prop. I had already mounted the battery in the normal spot up by the firewall between the pilot's legs. With all the extra weight up front, I'm sure I'll have to relocate the battery behind the cabin somewhere. Of note, however, is that I have electric trim installed in the Elevator, and the full-swivel tailwheel fork, both of which add some weight to the far aft location. > >I would appreciate some feedback on selecting an exacting location for the battery given my situation. Also, what gauge battery cables to use given the remote location. > >Its great to be back on the project; I'm looking forward to getting back into the discussions on the List! > >Thanks for the help! > >Matt Dralle >RV-4 #1762 - N442RV (res) >Matronics List Administrator Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551 925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email http://www.matronics.com/ WWW | Featuring Products For Aircraft ________________________________ Message 5 _____________________________________ Time: 03:32:13 PM PST US From: JFLEISC@aol.com Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel My -4 has a stock 0-360 with a fixed (max cruise pitch) and a large auto battery up front. It flies fine solo with full tanks but is still real easy to load to max aft CG unless careful. There was a time when I thought a 200hp would be nice but over the years of cleaning things up, tuning, and adjusting rigging etc it pushes the envelope already. Sometimes indicate 220mph S&L on low density altitude days. Still climbs at 3000fpm+ solo and sometimes see 4000 on half tanks. BTW, I bought the plane used about 12 years ago with the 0-360 and wood prop. It was a pig back then and was lucky to see 185mph. Jim **************Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp00300000002851) ________________________________ Message 6 _____________________________________ Time: 06:07:47 PM PST US From: JAMES HITTERMAN Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel What type of prop are you using, and do you know the pitch? I have a 4 with a 180 as well and am do a prop swap. Jim H ----- Original Message ---- From: "JFLEISC@aol.com" Sent: Monday, April 28, 2008 5:26:14 PM Subject: Re: RV4-List: Battery Location - RV4+180HP+CS+ETrim+FullSwivelTailwheel My -4 has a stock 0-360 with a fixed (max cruise pitch) and a large auto battery up front. It flies fine solo with full tanks but is still real easy to load to max aft CG unless careful. There was a time when I thought a 200hp would be nice but over the years of cleaning things up, tuning, and adjusting rigging etc it pushes the envelope already. Sometimes indicate 220mph S&L on low density altitude days. Still climbs at 3000fpm+ solo and sometimes see 4000 on half tanks. BTW, I bought the plane used about 12 years ago with the 0-360 and wood prop. It was a pig back then and was lucky to see 185mph. Jim Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv4-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV4-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/rv4-list Browse Digests http://www.matronics.com/digest/rv4-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.