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Most used design changes?

 
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libertyman777



Joined: 03 Feb 2012
Posts: 3

PostPosted: Tue Mar 14, 2017 3:57 am    Post subject: Most used design changes? Reply with quote

I'm still very new to Piets (at least entertaining thoughts of building one).

I'm not looking necessarily to alter anything but I'm just trying to understand why some of these changes are worthwhile or desirable and also to compile a list of alterations that people have made.

1). Three piece wing vs one piece wing
2). No gap ailerons.
3). Moveable wing to adjust for to far aft CG. (Is this contained in the plans?)
4). Different engine choices.
5). Longer and wider fuselage. (I get this one for wider but not longer).
6). Landing gear options.

I'm sure that's nowhere near all. Feel free to chime in with more and any information on these listed. I have some understanding from research but would like to know more.

Thanks,

Paul


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tools



Joined: 14 Mar 2011
Posts: 714

PostPosted: Tue Mar 14, 2017 6:12 am    Post subject: Re: Most used design changes? Reply with quote

1). Three piece wing vs one piece wing

This is purely convenience. A 29 ft wing is difficult to manage. The three piece mod adds weight and complexity.

2). No gap ailerons.

Not the lightest on the controls, some more aileron authority is nice, no gap promotes this. There are more elegant solutions than others... Duct tape does work.

3). Moveable wing to adjust for to far aft CG. (Is this contained in the plans?)

This is more about pilots getting heavier than when the plane was designed I believe. Also, not really movable. Once cg is established, during the build, there is no reason to move. Fixed and more robust forward angled cabane struts are highly recommended.

4). Different engine choices.

Most will agree that the model a is not the most reliable choice. The skills to make it as reliable as possible are getting harder and harder to find. A properly configured corvair costs as much as a continental. In its money saving form, again, not the most reliable. The a is wildly nostalgic. Thr corvair quite nostalgic and powerful. The continental is plainly easy. Other choices are more about the great spirit of experimenting, which is very in line with the airframe itself.

5). Longer and wider fuselage. (I get this one for wider but not longer).

The longer one is about not having to extend the motor mounts quite as much, and room for taller folks.

6). Landing gear options.

Pure choice here. Simple and fairly insignificant pros and cons to them all.

Of all the really obvious mods, about all that's left are things to make ingress and egress easier.

I think the best way to evaluate all of these is a trip to Brodhead, the other Piet gatherings, or shop/hangar visits to just see them in person for yourself.

Cheers,

Tools


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Vincent Dunn



Joined: 15 Dec 2016
Posts: 16
Location: Salem, OR

PostPosted: Wed Mar 15, 2017 12:58 pm    Post subject: Re: Most used design changes? Reply with quote

Libertyman777,
I’m a newby builder too so I thought I’d offer up my experience so far. I just bought the plans in September 2016 and, as you know, they lack a great deal of specificity. I took the advice of Tony Bingelis and built a 100% scale mockup of the fuselage this winter out of scrape wood. I learned a lot about the process and made several mistakes I won’t make when I get to building the ‘actual’ fuselage. I originally thought I wanted to use a Corvair engine but after some research and study, I have decided to go with the “wildly nostalgic” Ford Model A engine. The Ford will be simpler, cheaper, cooler and move my build project forward much faster. I’m also shortening the 14 foot, 6 inch Corvair ‘long’ fuse to just 14 feet cuz I can get really good Western Hemlock locally for much less than the expensive Spruce from AS&S. I’m trimming 6 inches off the fuse will help with the chronic tail heavy Piet syndrome and stretching the fuse forward 2” for the same reason. I’m also making my Air Camper a one-person plane for accommodate my 6 foot 4 inch frame. Or am I building a stretched Sky Scout? The great thing about the Piet is that you have a lot of options and room for customizing your plane to fit your needs and taste. Hope this helps. Feel free to contact me if you want to discuss more.


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oldbird



Joined: 23 Apr 2015
Posts: 91

PostPosted: Mon Mar 27, 2017 7:36 am    Post subject: Re: Most used design changes? Reply with quote

I think passenger door is another one for convenience. I applied it to mine.
Another one may be springs instead of J3 type rubber shocks. I applied that too.

Regards and happy landings

Semih (in Turkey)


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charlescampbell1924(at)gm
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PostPosted: Tue Mar 28, 2017 3:22 am    Post subject: Most used design changes? Reply with quote

I also put in the passenger door.  I wish now I had put it in the pilot's compartment.  You might consider that unless you are too far along.  C
On Mon, Mar 27, 2017 at 11:36 AM, oldbird <semihoksay(at)gmail.com (semihoksay(at)gmail.com)> wrote:
Quote:
--> Pietenpol-List message posted by: "oldbird" <semihoksay(at)gmail.com (semihoksay(at)gmail.com)>

I think passenger door is another one for convenience. I applied it to mine.
Another one may be springs instead of J3 type rubber shocks. I applied that too.

Regards and happy landings

Semih (in Turkey)




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=467682#467682






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oldbird



Joined: 23 Apr 2015
Posts: 91

PostPosted: Tue Mar 28, 2017 8:39 am    Post subject: Most used design changes? Reply with quote

I am unfortunately too far along. Fuselage is almost finished. But I don't think entry into the rear cockpit will be a problem. My fuselage is wider and longer too. To compensate for the longer nose side area, I enlarged the fin slightly.
Semih​
On Tue, Mar 28, 2017 at 2:22 PM, Charles N. Campbell <charlescampbell1924(at)gmail.com (charlescampbell1924(at)gmail.com)> wrote:
Quote:
I also put in the passenger door.  I wish now I had put it in the pilot's compartment.  You might consider that unless you are too far along.  C
On Mon, Mar 27, 2017 at 11:36 AM, oldbird <semihoksay(at)gmail.com (semihoksay(at)gmail.com)> wrote:
Quote:
--> Pietenpol-List message posted by: "oldbird" <semihoksay(at)gmail.com (semihoksay(at)gmail.com)>

I think passenger door is another one for convenience. I applied it to mine.
Another one may be springs instead of J3 type rubber shocks. I applied that too.

Regards and happy landings

Semih (in Turkey)




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=467682#467682






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br> enpol-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Pietenpol-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========





--
Semih Oksay


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