Re: [RCSE] West System Epoxy Question.
West epoxy is good stuff, but highly overated in my opinion and the mixing ratio is a pain. My favorite is System Three, it has a 2 parts resin to 1 part hardener ratio and 3 different hardeners. I have also been using epoxy from CMI (1-800-522-2599) I use the slow B-27 resin with A-40 hardener. It is good stuff and only costs about $15.00 for a 2 quart mix. The bst part is the 1 to 1 ratio. The downfall is that it takes longer to reach full hardness. You cant easily sand it for a day or 2 if the temps are low and it takes a week or 2 to reach full hardness unless you cook it. (most epoxies do this) They do have faster hardeners too, but in AZ I haven't found a need for them! Mark Mech [EMAIL PROTECTED] www.aerofoam.com - Original Message - From: "Rodger Hamer" [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Saturday, February 19, 2000 6:14 AM Subject: Re: [RCSE] West System Epoxy Question. Can somebody give me a website for West Systems epoxy? Is there a way to use good epoxy without buying huge quantities if one is just getting into this RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] West System Epoxy Question.
David you make a good point... perhaps you could check my math. West System pumps are available in sets only, as I understand, one for resin and one for hardener @ $8.30. Since I use two hardeners and one pump failed in the middle of a lay-up... I used four sets for a total of $33.20. We could discuss the loss of the wing... Also I have a friend that had a pump break in half during a lay-up, that was messy. West System is only one resin, I use four different resins for different purposes. I haven't mentioned the measured inaccuracies of the pumps yet have I? You need a scale for that. Perhaps you need to build a few more wings to find out what can go wrong... Phil Pearson Seattle -Original Message- From: David L. Stone [EMAIL PROTECTED] To: RCSE [EMAIL PROTECTED] Date: Saturday, February 19, 2000 8:26 AM Subject: Re: [RCSE] West System Epoxy Question. Reviewing my own experience the money spent on pumps would be better spent on a good scale that weighs at least 400 grams at 0.1 gram accuracy and has a tare function. Yeah but pumps cost only a few bucks each but the scale you describe costs $100, and for doing wings, where several 1oz batches have to be prepared, pumps are far easier and faster to use. To use a squeeze bottle in the middle of a layup, don't you have to either get the squeeze bottle covered with resin (yecchh) or put on a new pair of gloves? A wrist or forearm (presumably not dripping with resin) can be used to dispense resin from a pump, thus saving $$ you would spend on extra gloves---this will pay for the pumps before you know it :-). David Berkeley CA USA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] West System Epoxy Question.
philip pearson wrote: Also I have a friend that had a pump break in half during a lay-up, that was messy. You guys must be some ham fisted bruts. Slow and easy on the pumps. Just like a good woman. Everything will go smooth... I haven't mentioned the measured inaccuracies of the pumps yet have I? You need a scale for that. I have a gram scale (0.1 gram inc's.) and measure just about every batch that I have dispensed from the quart size pumps, just to verify the mix. All have been within about 2 tenths of a gram of each other. Perhaps you need to build a few more wings to find out what can go wrong... I know of a few guys from the Carlisle, PA area (BAR/CSS Club) that have laid up a few HUNDRED (read 200-300) handlaunch wings over the past 2 years and have heard no bad reports about the West System pumps in question. These pumps are accurate, simple and hassle free, I think I'll keep using mine.. Phil Pearson Seattle -Original Message- From: David L. Stone [EMAIL PROTECTED] To: RCSE [EMAIL PROTECTED] Date: Saturday, February 19, 2000 8:26 AM Subject: Re: [RCSE] West System Epoxy Question. Reviewing my own experience the money spent on pumps would be better spent on a good scale that weighs at least 400 grams at 0.1 gram accuracy and has a tare function. Yeah but pumps cost only a few bucks each but the scale you describe costs $100, and for doing wings, where several 1oz batches have to be prepared, pumps are far easier and faster to use. To use a squeeze bottle in the middle of a layup, don't you have to either get the squeeze bottle covered with resin (yecchh) or put on a new pair of gloves? A wrist or forearm (presumably not dripping with resin) can be used to dispense resin from a pump, thus saving $$ you would spend on extra gloves---this will pay for the pumps before you know it :-). David Berkeley CA USA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] West System Epoxy Question.
I haven't mentioned the measured inaccuracies of the pumps yet have I? No, but please do! This type of pump has been around for decades and seems to be adequate for chemists/biochemists and other applications requiring better than the +/-10% of some resin systems, so it would be interesting to hear how bad yours are. Perhaps you need to build a few more wings to find out what can go wrong... Mebbe, but my pumps cost less (as I recall) and have never broken (could be how well they are treated, no?), and I do use fewer epoxies than you (like most folks, I think). David Berkeley CA USA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
