Pietenpol-List: Engine mounts, vertical fin offsets and ash

[matronics]

Original Posted By: "Cuy, Michael D. (GRC-RXD0)[Vantage Partners, LLC]"
To conserve posts, I'm commenting on a few threads here:1. Jack Phillips's engine mount jig worked beautifully for me. If he says that he put 9/16 offset for the engine into it, which sounds about right, then my experience has been that it works well for an A-65. 2. I offset my vertical fin 3/4" and that seems about right, again for the A-65 with the 9/16 offset on the mount. Realize that that engine offset and fin offset should be working together make the airplane fly straight when in level flight without any rudder input. I can't tell you which modification results in more effect but the combination I have works well.3. I bought the ash pieces that form the carry-through for the loads on the main gear and wing struts from Paxton Lumber Company probably 12 years ago. I can't recall whether I got a single 4X4 piece and cut it down or had them mill me pieces to the correct dimension but it was beautiful, straight grained wood. They're on the web but also have locations in several mid-western cities. As Jack correctly pointed out, ash is much stronger, though heavier cubic inch for inch, than Sitka spruce. I was asked to go look at Piet a guy had bought, recently completed and certified with the 40 hours flown off. The carry through pieces were some kind of plywood, didn't even appear to be aircraft grade. Wood substitution in a lot of the structure is a Pietenpol tradition but this particular area gets a lot of load and is pretty critical for the overall structural integrity of the airplane. I'm sure there are probably hardwoods that could be substituted for white ash, but ash readily available, not particularly expensive considering the small amount needed, and proven over 80 years. Matt Paxton________________________________________________________________________________

[matronics]

Original Posted By: "kevinpurtee"
Scary, treacherous, and thrilling...!!--------Jake Schultz - curator,Newport Way Air Museum (OK, it's just my home)Read this topic online here:http://forums.matronics.com/viewtopic.p ... ___Subject: Pietenpol-List: Re: Engine mounts, vertical fin offsets and ash

[matronics]

Original Posted By: "Ray Krause"
Hi Tom - I left everything at zero and, predictably, require lots of left pedal.--------Kevin "Axel" PurteeNX899KPAustin/San Marcos, TXRead this topic online here:http://forums.matronics.com/viewtopic.p ... __________