---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Wed 09/15/04: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:39 PM - to match drill or not to match drill (Doug Brinlee) 2. 09:00 PM - SEC: UNCLASSIFIED Re: to match drill or not to match dr (Francis, David CMDR) ________________________________ Message 1 _____________________________________ Time: 07:39:19 PM PST US From: "Doug Brinlee" Subject: RV7-List: to match drill or not to match drill --> RV7-List message posted by: "Doug Brinlee" I have posted this on the RV7 yahoo group also. When you dimple the skin and rib of the wing the rivets fit perfectly. Do you have to match drill?? I have heard through the grapevine that it is not necessary. Any thoughts. Doug Brinlee RV7wing ________________________________ Message 2 _____________________________________ Time: 09:00:10 PM PST US From: "Francis, David CMDR" ill Subject: SEC: UNCLASSIFIED RE: RV7-List: to match drill or not to match dr ill --> RV7-List message posted by: "Francis, David CMDR" Doug, By dimpling undersized holes you are enlarging by violence rather than gentleness. By match drilling to final size then dimpling you will treat the metal more gently and minimise the incidence of stress risers around holes, which will be the point of origin for cracks to generate in later life. Having inspected a couple of elderly RVs here I have match drilled all the 15,500 rivet holes in my creation. Its your call. Have fun, David Francis, Canberra, Australia. RV7 waiting for the engine. -----Original Message----- From: Doug Brinlee [mailto:abfbrinlee@att.net] Subject: RV7-List: to match drill or not to match drill --> RV7-List message posted by: "Doug Brinlee" When you dimple the skin and rib of the wing the rivets fit perfectly. Do you have to match drill?? I have heard through the grapevine that it is not necessary. Any thoughts. Doug Brinlee RV7wing