Search found 159 matches

by Richard Roller
Wed Sep 08, 2021 2:21 pm
Forum: Pietenpol Builders Forum
Topic: Brazing Rods for 4130
Replies: 3
Views: 545

Re: Brazing Rods for 4130

N34KP, the Piet I fly, was built by Ken Perkins and has been flying since 2000. Ken did not braze any of the parts. I believe he used ER70-s2 rod. So far, so good.
by Richard Roller
Thu Aug 12, 2021 12:55 pm
Forum: Pietenpol Builders Forum
Topic: Ford A
Replies: 3
Views: 667

Re: Ford A

There is a young man in the Czech Republic that is building a Piet using a different water cooled engine. You might want to take a look.

https://www.historicpropellers.com/pietenpol-aircamper
by Richard Roller
Tue Aug 10, 2021 12:01 am
Forum: Pietenpol Builders Forum
Topic: Ford A
Replies: 3
Views: 667

Re: Ford A

by Richard Roller
Thu Jul 01, 2021 8:10 am
Forum: Pietenpol Builders Forum
Topic: Houston TX area builder/pilots
Replies: 4
Views: 860

Re: Houston TX area builder/pilots

It get mighty hot and humid in that part of the world!
by Richard Roller
Thu Jun 24, 2021 12:31 pm
Forum: Pietenpol Builders Forum
Topic: About fuel tank design and CG.
Replies: 4
Views: 1058

Re: About fuel tank design and CG.

Piper. I've been reading the various posts you've put up on building your Pietenpol. You seem to be overthinking this process. Maybe a little more information would help us all. Are you attempting to build an ultra-lite version? What engine? How much horsepower? Fuel consumption. If an ultra-lite yo...
by Richard Roller
Mon Jun 21, 2021 9:57 am
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

I've put 2 hours on the new wheels and brakes, 7 touch and goes and landings. So far no problems. The a/c continues to track straight and to be docile on landing. I currently have 15lbs. of air pressure in the tires. Probably about right if I take a passenger up, but I have to ride the brakes a lot ...
by Richard Roller
Mon Jun 21, 2021 9:41 am
Forum: Pietenpol Builders Forum
Topic: Heel Brakes
Replies: 8
Views: 1521

Re: Heel Brakes

By the way Terry, good to see you back on the site.
by Richard Roller
Mon Jun 21, 2021 9:40 am
Forum: Pietenpol Builders Forum
Topic: Heel Brakes
Replies: 8
Views: 1521

Re: Heel Brakes

Dan. Are the red straps control stops?
by Richard Roller
Thu Jun 03, 2021 10:34 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

We've had a lot of rain. They finally got a chance to mow yesterday and today. Maybe they should bale it.
by Richard Roller
Thu Jun 03, 2021 5:49 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

N34KP flew again today! The new wheels and brakes worked well, they track straight. I did cut the grass while I was at it.
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by Richard Roller
Thu Jun 03, 2021 5:47 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Yes there is a break in routine and they are getting better as I taxi.
by Richard Roller
Wed Jun 02, 2021 6:17 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Taxied around today. They are not as strong as I would like. Hopefully they will be better when the pucks wear in. I rechecked the ratio of pedal length to master cylinder arm and it is correct. I really have to get into them to stop the Piet.
by Richard Roller
Mon May 31, 2021 4:41 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Oscar. They are 6:00 x 6 tires. The new wheels are narrow and even though they say they will mount the 8:00 x 6 tires I couldn't get the wheel half's together without pinching the tubes. I ruined one tube trying. I had a hard enough time with the smaller 6:00 x 6 tubes.
by Richard Roller
Sat May 29, 2021 4:59 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

We have operational brakes! I haven't been able to taxi test yet, the propeller is still off, but I've bled the system and they are nice and firm with no leaks. So far no leaks, anyway!
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by Richard Roller
Tue May 25, 2021 8:34 am
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

The tubing I bought is from McMaster-Carr. It's nylon rated at 430 psi. The brakes are open, with no wheel pants. I intend to use the brakes only when taxiing on the ground, not for landing. I didn't move the wheel locations, fore and aft, they are to the plans. So I could probably put the old Piet ...
by Richard Roller
Mon May 24, 2021 6:03 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Hey Oscar. How'd you like those fancy reservoirs? Just for grins I weighed the master cylinder assemblies. Everything including hardware (no fluid) is 1 lb. 2 oz. each side.
by Richard Roller
Sun May 23, 2021 5:30 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Still plugging along.
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by Richard Roller
Thu May 13, 2021 3:04 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

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N34KP is standing on two new main wheel and brake assemblies now. Master cylinders and plumbing next.
by Richard Roller
Fri May 07, 2021 7:23 pm
Forum: Pietenpol Builders Forum
Topic: status of current build
Replies: 33
Views: 6369

Re: status of current build

Nice!
by Richard Roller
Wed May 05, 2021 5:45 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Left main on the ground. It looks so strange with a 6:00 x 6 tire instead of the 8:00 x 6 that was on it! I may have to go back to the old tires. Time will tell.
I haven't ran the hydraulic tubes yet, or installed the master cylinders.
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by Richard Roller
Wed Apr 28, 2021 12:49 pm
Forum: Pietenpol Builders Forum
Topic: N34KP's spark plug bushings
Replies: 4
Views: 1231

Re: N34KP's spark plug bushings

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After paint. It doesn't look it, but it's a dark green.
by Richard Roller
Tue Apr 27, 2021 10:45 am
Forum: Pietenpol Builders Forum
Topic: N34KP's spark plug bushings
Replies: 4
Views: 1231

N34KP's spark plug bushings

Way back when, Ken decided he wanted aviation (18MM) plugs in the Model A. So he machined a set of bushings for the head. He made them round. We had problems from day one taking the plugs out without the bushings coming with them. So we used slip joint pliers to hold the bushings when removing the p...
by Richard Roller
Mon Apr 26, 2021 10:30 am
Forum: Pietenpol Builders Forum
Topic: Hello - First post - NX899TD
Replies: 4
Views: 1456

Re: Hello - First post - NX899TD

Which engine? (Ford I hope :D)
by Richard Roller
Sun Apr 25, 2021 10:00 am
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

A test fitting.
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The new axles and wheels in place. They are not drilled and bolted yet. The axle stub is the existing 1-1/2" axle after being trimmed.
by Richard Roller
Sun Apr 25, 2021 9:57 am
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Pictures of the brake pedals and the finished axles for the Matco wheels and brakes. I will drill the axle attach bolt holes when in place.
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by Richard Roller
Thu Apr 15, 2021 9:50 am
Forum: Pietenpol Builders Forum
Topic: N34KP
Replies: 27
Views: 9019

Re: N34KP

Snowballing has been known to happen! Like right now. Still working on the brakes when able, the radiator was removed for a clean out and a polish (still off). I'm considering an ignition change and a change in the engine breather, but those will wait until its flyable again. I'll pre-construct thos...
by Richard Roller
Mon Apr 12, 2021 10:28 pm
Forum: Pietenpol Builders Forum
Topic: N34KP
Replies: 27
Views: 9019

Re: N34KP

Oscar. That's quite the story!
by Richard Roller
Fri Apr 09, 2021 2:17 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

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Torque plates for the Piets new brakes.
by Richard Roller
Wed Mar 31, 2021 4:13 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

I was going to post pictures of the brake pedals, but I just realized I didn't take pictures of them. So here is a photo of the adaptors for the brake torque plates. They will bolt over the trimmed 1-1/2" axles and the 1-1/4" axles will slide inside.
by Richard Roller
Sun Mar 07, 2021 6:20 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

I've cut out all the pieces for the actuators foot pedals. I also have hooked up my tig welder. So...., after I get some practice welds in I'll try assembling the pieces. Wish me luck.
by Richard Roller
Mon Mar 01, 2021 12:01 pm
Forum: Pietenpol Builders Forum
Topic: Age and Insurance
Replies: 6
Views: 1825

Re: Age and Insurance

Jim. I lack 3 years to 70, but I'll tell you what I have. I'm in the Kansas City area, N34KP is hangered at K34, Gardner, KS. Through Falcon insurance I pay about $450 per year, liability only. That includes the airport requirements for them, in case I burn the hanger down. I've been involved with P...
by Richard Roller
Mon Feb 15, 2021 1:02 pm
Forum: Pietenpol Builders Forum
Topic: Once more, N34KP weight and balance
Replies: 0
Views: 1380

Once more, N34KP weight and balance

Just for grins, because it’s very cold outside and I can’t work on the Piet, I’ve decided to investigate N34KP’s weight and balance if Ken had decided to slope the wing back instead of moving the engine forward. See the post I did on 11-10-2017 on the weight and balance problems of 34KP. I’ve had to...
by Richard Roller
Sun Jan 31, 2021 2:22 pm
Forum: Pietenpol Builders Forum
Topic: control stick travel
Replies: 11
Views: 3430

Re: control stick travel

I looked at 34KP. It looks like Ken built it to the plans in reference to the seat cutout. I set in it and the stick hits my legs before it hits the cutout. There is no sign of the tube hitting the cutout.
by Richard Roller
Sat Jan 23, 2021 11:19 am
Forum: Pietenpol Builders Forum
Topic: jury struts
Replies: 6
Views: 2293

Re: jury struts

N34KP's jury struts are 3/8" x 9/16" steel streamlined tubes. I don't know where Ken found them. He told me once he'd bought them 20 years, or so, ago when he was buying stuff for his Great Lakes project. jury strut.jpg A.E.D. metal products have odd size and small streamlined tubes in dif...
by Richard Roller
Sat Jan 16, 2021 7:06 am
Forum: Pietenpol Builders Forum
Topic: Center Section Flooring
Replies: 2
Views: 1371

Re: Center Section Flooring

It's my understanding that the plywood floor does resist drag loads in the center section. The one piece wing has no drag/anti-drug wires in the center section and the cabanes will not react the loads.

Maybe Oscar will weigh in on this, he has the background to explain it.
by Richard Roller
Thu Jan 14, 2021 3:52 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

Very true.
by Richard Roller
Wed Jan 13, 2021 12:52 pm
Forum: Pietenpol Builders Forum
Topic: Brake master cylinder mountings
Replies: 57
Views: 12571

Re: Brake master cylinder mountings

brackets.jpg
I made a set of brackets for the master cylinders. The piece of 1" key stock is the drill guide from the tail longeron repair. I added an extra hole to match the hole spacing for these brackets. It'll be clamped in place and the holes back drilled through the station diagonal.
by Richard Roller
Fri Dec 25, 2020 5:46 pm
Forum: Pietenpol Builders Forum
Topic: First Quarter 2021 Newsletter
Replies: 4
Views: 2173

Re: First Quarter 2021 Newsletter

I emailed an article last night.
by Richard Roller
Mon Dec 14, 2020 11:38 am
Forum: Pietenpol Builders Forum
Topic: Fuselage
Replies: 1
Views: 1346

Re: Fuselage

The tube fuselage is shown on the Pietenpol family plans. Just substitute 4130 tubing.
by Richard Roller
Sat Dec 12, 2020 8:55 am
Forum: Pietenpol Builders Forum
Topic: Strut Materials
Replies: 10
Views: 3559

Re: Strut Materials

You referenced Ken Perkins. I have the a/c (N34KP) that he was building when you visited, as Oscar noted. I meet Ken about 1994, when we both worked for TWA at the Kansas City overhaul base. I had worked on small a/c before being at the base and Ken needed someone who could get all the way into the ...
by Richard Roller
Sat Dec 12, 2020 8:39 am
Forum: Pietenpol Builders Forum
Topic: Strut Materials
Replies: 10
Views: 3559

Re: Strut Materials

Varmint. A case of needless information, I apologize. As Oscar noted the "L'/p" reference is to slenderness ratios and how that works with the column loads. And the "equivalent round tube" is a reference to the round tube (same wall thickness) that would react the same as the str...
by Richard Roller
Thu Dec 10, 2020 10:17 am
Forum: Pietenpol Builders Forum
Topic: Strut Materials
Replies: 10
Views: 3559

Re: Strut Materials

Ken Perkins Piet, N34KP, has the following sizes of lift/cabane struts. All struts are SAE 4130 steel streamline tubes. forward and aft lift struts: 2.023" x .857", .049 wall thickness, ERT* 1.5 & 1.0 cabane struts: 1.685" x .714", .049 wall thickness, ERT 1.25 & .75 caba...
by Richard Roller
Tue Dec 08, 2020 6:40 pm
Forum: Pietenpol Builders Forum
Topic: Strut Materials
Replies: 10
Views: 3559

Re: Strut Materials

Regular old 4130 struts are used, as in 34KP
A lot of people are using the extruded aluminum struts from Carlsons, they work well and save some weight.

The struts in the plans are not available anymore.
by Richard Roller
Mon Nov 30, 2020 3:39 pm
Forum: Pietenpol Builders Forum
Topic: strut attach fitting angle
Replies: 9
Views: 2908

Re: strut attach fitting angle

Yes. While I was still working on large a/c we always used the aviation equivalent to your polysulfides, patches, hardware, etc. When I worked small a/c you didn't see it much, except in fuel tank areas.

Personally, I think it would be a good idea on a wood a/c.
by Richard Roller
Sun Nov 29, 2020 8:57 am
Forum: Pietenpol Builders Forum
Topic: strut attach fitting angle
Replies: 9
Views: 2908

Re: strut attach fitting angle

I'm sure you noticed, but Ken didn't use the steel straps from side to side (fitting to fitting) shown on the plans. He didn't think them necessary. This last spring while I was finishing the repair to the tail longeron, I pulled the landing gear/lift strut attach fitting bolts out, one at a time. T...
by Richard Roller
Sat Nov 28, 2020 3:57 pm
Forum: Pietenpol Builders Forum
Topic: strut attach fitting angle
Replies: 9
Views: 2908

Re: strut attach fitting angle

Phone photos. When clicked on they will be upright. This is the right side, forward strut attach point.
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by Richard Roller
Sat Nov 28, 2020 10:52 am
Forum: Pietenpol Builders Forum
Topic: strut attach fitting angle
Replies: 9
Views: 2908

Re: strut attach fitting angle

My mistake! Yes, you DO want your strut tabs lined up with the strut angle! N34KP has it's strut tabs on the fuselage bent to line up with the actual strut angle. I was just looking at my set of plans and I don't see any angle noted. Ken bent his to the angle needed to be in line with the struts, as...
by Richard Roller
Thu Nov 26, 2020 8:24 am
Forum: Pietenpol Builders Forum
Topic: strut attach fitting angle
Replies: 9
Views: 2908

Re: strut attach fitting angle

N34KP has the strut attach fittings as drawn on the plans, with plywood strips on either side of them, That is how Ken Perkins built it. It's worked fine for 20+ years now. Personally, when I built one I will attach them inline with the struts.