---------------------------------------------------------- Pietenpol-List Digest Archive --- Total Messages Posted Sat 09/20/14: 12 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:29 AM - Re: new engine (bender) 2. 04:37 PM - Re: Re: new engine (Ray Krause) 3. 05:58 PM - Re: new engine (taildrags) 4. 06:54 PM - Lift struts (Bill R) 5. 07:02 PM - Re: Lift struts (Jack Phillips) 6. 07:44 PM - battery (Steven Dortch) 7. 08:09 PM - Re: Lift struts (Braniff1966) 8. 08:11 PM - Re: Re: new engine (Ray Krause) 9. 08:15 PM - Re: battery (jim hyde) 10. 09:16 PM - Re: battery (Gloriabots) 11. 09:21 PM - Re: battery (Ray Krause) 12. 10:26 PM - Re: Lift struts (dgaldrich) ________________________________ Message 1 _____________________________________ Time: 07:29:22 AM PST US Subject: Pietenpol-List: Re: new engine From: "bender" I carved the prop out of ash. . Following Dan Helspers instructions. I'm heading over to see if it'll start today. Jeff Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430821#430821 ________________________________ Message 2 _____________________________________ Time: 04:37:36 PM PST US From: Ray Krause Subject: Re: Pietenpol-List: Re: new engine Beautiful, single piece of ash? Thanks, And it will run just fine. Don't forget to safety wire the carb bolts, if you haven't. I had to check yours because I'm trying to do mine right now, not easy! Love your crush plate, I have to make one. Not sure what happened to the one for my engine. I have the prop, spinner, bolts and everything but the crush plate. I have a friend who can probably make one on his CNC milling machine. Let us know how it runs. What mags are you running? Ray Krause Sent from my iPad > On Sep 20, 2014, at 7:28 AM, "bender" wrote: > > > I carved the prop out of ash. . Following Dan Helspers instructions. I'm heading over to see if it'll start today. > > Jeff > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=430821#430821 > > > > > > > > > > ________________________________ Message 3 _____________________________________ Time: 05:58:13 PM PST US Subject: Pietenpol-List: Re: new engine From: "taildrags" She's a beauty, Jeff. A real beauty. The external aileron cables sure make preflight inspection easy, and so does the abbreviated cowling that pretty much puts the entire engine out there where you can look at everything. I've got to agree with Ray or whoever it was who mentioned safetying the carb it takes more time to safety everything on a Stromberg than it does to rebuild one ;o) I just put another 1.0 on Scout this afternoon and like you said with yours, my A75 fired up on the third blade and never missed a beat. We had 99 degrees this afternoon and the oil temp got up to about 195 in the climb to 3000', but the engine is dry as a bone (except for a slight drip from one of the rocker cover gaskets and a couple of drops from the breather after I park) and everything is smooth. For my crush plate I just had my machinist buddy turn a disc from 1/4" aluminum stock and drill for the AN6 bolts, then I sandwiched a replica Continental Motors plate between the bolt heads and crush plate (got it from Wag-Aero) and safetied after torqueing. You can see it at http://www.flysquirrel.net/piets/engine/A75.html -------- Oscar Zuniga Medford, OR Air Camper NX41CC "Scout" A75 power Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430850#430850 ________________________________ Message 4 _____________________________________ Time: 06:54:26 PM PST US Subject: Pietenpol-List: Lift struts From: "Bill R" I am trying to determine what material to use for my lift struts and cabanes. In the running are 4130 streamline tubing from Aircraft Spruce, aluminum streamline from Carlson and 4130 tubing streamlined the old fashion way. It looks like the 4130 streamline tubing from Aircraft Spruce would cost well north of $1500. Their catalog did not list any load bearing capabilities for the various sizes of tubing. The Carlson website does list load bearing capabilities,but in terms I am not familiar with. The cost savings of aluminum over the steel streamline tubing is not insignificant. The old fashion way of streamline steel tubing is not to appealing to me, but I might be talked into it. The real questions for me have to do with understanding the loads likely to be imposed on the lift struts of an Aircamper and whether or not the aluminum strut material from Carlson is up to the task. I know there is at least one Aircamper flying with the aluminum struts, Dan Helspers'. Dan and his beautiful plane were featured in the summer issue of Contact magazine. As the article was not of an engineering nature there was no mention of any research Dan may have done before deciding to use the aluminum struts.Not being one to to risk my neck or anyone else's, I would prefer to have some data before I follow someone else's example. Any thoughts would be appreciated, but please keep in mind you will be replying to a simpleton,not an engineer. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430851#430851 ________________________________ Message 5 _____________________________________ Time: 07:02:02 PM PST US From: "Jack Phillips" Subject: RE: Pietenpol-List: Lift struts Bill, Another option (and one that has been used many times, including on my own Pietenpol), is to find a set of old Piper Cub struts, removed due to AD. You can cut off the bottom end of the strut where the corrosion is and still have plenty of good steel left to make a Pietenpol lift strut, since the Cub struts are about 10' long, but Pietenpol only needs about 8' per strut. There are a lot of these old struts out there - it just takes a little perseverence to find them. They are not 4130, but are 1018 mild carbon steel, and only .035" thick. Still they are plenty strong enough for a Pietenpol. Jack Phillips NX899JP Smith Mountain Lake, Virginia -----Original Message----- From: owner-pietenpol-list-server@matronics.com [mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of Bill R Sent: Saturday, September 20, 2014 9:54 PM Subject: Pietenpol-List: Lift struts I am trying to determine what material to use for my lift struts and cabanes. In the running are 4130 streamline tubing from Aircraft Spruce, aluminum streamline from Carlson and 4130 tubing streamlined the old fashion way. It looks like the 4130 streamline tubing from Aircraft Spruce would cost well north of $1500. Their catalog did not list any load bearing capabilities for the various sizes of tubing. The Carlson website does list load bearing capabilities,but in terms I am not familiar with. The cost savings of aluminum over the steel streamline tubing is not insignificant. The old fashion way of streamline steel tubing is not to appealing to me, but I might be talked into it. The real questions for me have to do with understanding the loads likely to be imposed on the lift struts of an Aircamper and whether or not the aluminum strut material from Carlson is up to the task. I know there is at least one Aircamper flying with the aluminum struts, Dan Helspers'. Dan and his beautiful plane were featured in the summer issue of Contact magazine. As the article was not of an engineering nature there was no mention of any research Dan may have done before deciding to use the aluminum struts.Not being one to to risk my neck or anyone else's, I would prefer to have some data before I follow someone else's example. Any thoughts would be appreciated, but please keep in mind you will be replying to a simpleton,not an engineer. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430851#430851 ________________________________ Message 6 _____________________________________ Time: 07:44:35 PM PST US Subject: Pietenpol-List: battery From: Steven Dortch Gentlemen, and Oscar, I am going to add a battery to run my radio/intercom as well as my oil pressure and temp gauges. Any thoughts? I want light, cheap and very effective. If it has much weight at all, I plan on putting it as far forward as possible. Any input on forward or behind the firewall. What battery do you suggest? -- Blue Skies, Steve D ________________________________ Message 7 _____________________________________ Time: 08:09:39 PM PST US Subject: Pietenpol-List: Re: Lift struts From: "Braniff1966" any of the choices you talked about are just fine..cub struts are cheap and work great.. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=430856#430856 ________________________________ Message 8 _____________________________________ Time: 08:11:32 PM PST US From: Ray Krause Subject: Re: Pietenpol-List: Re: new engine Oscar, Thanks for the lead on the Continental "crush" plate replica from Wag-Aero. Now we can all copy you! I had seen your crush plate before and admired it. The shield on the mags did not work. I even insulated the shield around the p lead terminal, but it still shorted out and made the engine lose power. And, it did not stop the radio noise, maybe just a little better. Now I have tried everything, maybe time for some Slick mags. Just another $1600! But thanks to you and your friend for all the help. The only thing I have not tried is a good, isolated antenna. Thanks again, Ray Krause Sent from my iPad > On Sep 20, 2014, at 5:57 PM, "taildrags" wrote: > > > She's a beauty, Jeff. A real beauty. The external aileron cables sure make preflight inspection easy, and so does the abbreviated cowling that pretty much puts the entire engine out there where you can look at everything. I've got to agree with Ray or whoever it was who mentioned safetying the carb it takes more time to safety everything on a Stromberg than it does to rebuild one ;o) > > I just put another 1.0 on Scout this afternoon and like you said with yours, my A75 fired up on the third blade and never missed a beat. We had 99 degrees this afternoon and the oil temp got up to about 195 in the climb to 3000', but the engine is dry as a bone (except for a slight drip from one of the rocker cover gaskets and a couple of drops from the breather after I park) and everything is smooth. For my crush plate I just had my machinist buddy turn a disc from 1/4" aluminum stock and drill for the AN6 bolts, then I sandwiched a replica Continental Motors plate between the bolt heads and crush plate (got it from Wag-Aero) and safetied after torqueing. You can see it at http://www.flysquirrel.net/piets/engine/A75.html > > -------- > Oscar Zuniga > Medford, OR > Air Camper NX41CC "Scout" > A75 power > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=430850#430850 > > > > > > > > > > ________________________________ Message 9 _____________________________________ Time: 08:15:52 PM PST US From: jim hyde Subject: Re: Pietenpol-List: battery make a bracket.. mount it on the engine and look at it thats how it was done in the day of strong men and weak planes..thats how i did mine.. On Saturday, September 20, 2014 9:50 PM, Steven Dortch wrote: Gentlemen, and Oscar, I am going to add a battery to run my radio/intercom as well as my oil pressure and temp gauges. Any thoughts? I want light, cheap and very effective. If it has much weight at all, I plan on putting it as far forward as possible. Any input on forward or behind the firewall. What battery do you suggest? -- Blue Skies, Steve D ________________________________ Message 10 ____________________________________ Time: 09:16:38 PM PST US From: Gloriabots Subject: Re: Pietenpol-List: battery Steve A lightweight battery I have found very effective comes from Ballistic Batteries in US. It's a LiFePO4 and I went for 4 Cell version weighing in at 0.9 of a pound and a 2.5 Amp Hour discharge rate. http://www.ballisticparts.com/product_info.php?cPath=141&products_id=424 Look at this one too: http://www.hobbyking.co.uk/hobbyking/store/uh_viewItem.asp?idProduct=58820 (I think there is a US Store? Several other larger capacity batteries in Ballistic range and weight always much less than Lead Acid. You can charge with a conventional Charger so don't be put off by accessory list. CAUTION! NEVER LET BATTERY DISCHARGE TO FLAT! The Cells become unstable and don't charge so 13 Volts becomes 10V! Please do not inquire about who left Radio on! Regards Gerry p.s. Mine drives an XCOM 760 Panel Mount and an iPhone for navigation. ________________________________ Message 11 ____________________________________ Time: 09:21:01 PM PST US Subject: Re: Pietenpol-List: battery From: Ray Krause ________________________________ Message 12 ____________________________________ Time: 10:26:56 PM PST US Subject: Pietenpol-List: Re: Lift struts From: "dgaldrich" Here are some data points: The Carlson "large" struts have a yield strength just a bit more than 11,000 pounds. Using an 8 inch circumference and.035 wall thickness 1018 cold drawn steel for Cub struts gives about 15,000 as a yield strength. Hot rolled 1018 gives 9,000 pounds. Notes: I believe that there are 2 sizes of struts on the Cubs with the front being larger. They also taper a bit at the lower fuselage attachment point so that, as installed by Piper, they will have a little less strength than a mid-point cross-section. I'm guessing on the 8 inch circumference but it's pretty close. 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