---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Sun 11/23/03: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:28 PM - Re: Fuel Inj. ret.line (Dean) 2. 04:13 PM - Re: Quiet Drills-SAFETY WARNING (Randy Richter) 3. 04:52 PM - Fellow RV builders- DRDT-1 dimpling tool (Merems) ________________________________ Message 1 _____________________________________ Time: 12:28:56 PM PST US From: "Dean" Subject: Re: RV7-List: Fuel Inj. ret.line --> RV7-List message posted by: "Dean" Darwin I know that my RV-9A tank rib is different than the one on your 7. After checking with Van's, I located straight AN fittings in the upper rear corner of the end rib. Only when I started on the fuselage, did I realize that the fittings were looking straight at the end of the upper forward bar of the wing center section. I am now in the process of replacing those fittings with 45 degree angled ones. I have also found that some builders are extending their return fuel lines into the second tank bay or further to improve fuel cooling. I believe that your end rib has more area to work with, but I would suggest keeping the return out of the access plate if possible and away from the fuel quantity float. Dean Fuselage/Finish 13B Rotary ----- Original Message ----- From: "Darwin N. Barrie" Subject: RV7-List: Fuel Inj. ret.line > --> RV7-List message posted by: "Darwin N. Barrie" > > I can't find any information on the placement of the fuel injected return line to the tank. I was thinking of placing a fitting on the large plate on the root rib near the top of the plate. Any help?? > > Darwin N. Barrie > Chandler AZ > > ________________________________ Message 2 _____________________________________ Time: 04:13:24 PM PST US From: Randy Richter Subject: Re: RV7-List: Quiet Drills-SAFETY WARNING --> RV7-List message posted by: Randy Richter Actually, I think it's more akin to tearing a hole in the very fabric of space... Randy Rob Prior wrote: >--> RV7-List message posted by: Rob Prior > >Ross Schlotthauer wrote: > > >>--> RV7-List message posted by: Ross Schlotthauer >> >>Induction >>motors immerse the highly conductive aluminum >>components in a very damaging electromagnetic >>inductive field surrounding the motor. This >>electromagnetic field alters the microstructure of the >>structural grade aluminum and predisposes the flight >>critical components to fatigue failures. This is a >>very proven and thoroughly documented cause of >>structural failures in early all-metal aircraft. >> >> > >Wow. I'm not a materials specialist by any means, but I *am* a mech >eng., and this is the first i've heard about an EMF from a drill being >able to alter the microstructure of aluminum. > >I may be completely wrong, and this is just one of those things that >doesn't get published anywhere prominent. But without any references to >verify this claim, i'd have to say it sounds like a load of hogwash. > >Would you care to provide some references that I could check? > >Thanks, >-RB4 > RV-7 Empennage > (and quite happily finish drilling all these pre-punched holes with an >1800 rpm DeWalt cordless *electric* drill). > > > > ________________________________ Message 3 _____________________________________ Time: 04:52:14 PM PST US From: "Merems" , , , Subject: RV7-List: Fellow RV builders- DRDT-1 dimpling tool --> RV7-List message posted by: "Merems" Fellow RV Builders, I have developed a new dimpling tool (DRDT-1) that is easier, faster, quieter, and safer (on the skins) then any other tool offered by existing aircraft tool suppliers. I have designed it to accommodate all the skins used in a RV construction including the prebent leading and trailing edge skins and the larger skins used in the RV-10. Please visit ExperimentalAero at www.experimentalaero.com for more information about the DRDT-1, pricing and latest updates. Additionally on this website you will also find innovative tools and components under development for your experimental aircraft project. 10/11/03 (CASA GRANDE, AZ) The DRDT-1 was demonstrated to Ken Krueger (engineering) and Scott McDaniels (prototype shop) from Van's Aircraft at the Copperstate Fly-in. Van's prototype shop uses the c-frame impact dimpling tool mounted on a table. According to Scott, the c-frame is the nosiest tool in the shop and hearing protection is required when in use. Prior to actually using the DRDT-1 both were very skeptical about the tool and its ability to dimple as well as the impact c-frame dimplers on the market. After trying it they both were surprised at the ease, consistency and quality of the dimpling. In fact Scott, the most skeptical of all and self proclaimed dimpling snob, only used it a few times and then requested a unit be sent to Van's prototype shop. With the DRDT-1 the noise level in the prototype shop will be greatly reduced (there is no noise produced while dimpling with the DRDT-1), not to mention the increase in speed and consistency of dimpling. Sincerely, Paul Merems