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Search: Posts Made By: jpolenek
Forum: Chap 19 - Wings & Ailerons Yesterday, 12:45 PM
Replies: 9
Views: 351
Posted By jpolenek
Re: Aileron inboard cut line

Two steps forward, one step back. I might have figured out what that extra line is supposed to represent. It’s where NOT to cut.

For convenience, I started cutting out the bottom aileron surface...
Forum: Cheap Plane Building 02-11-2018, 12:53 AM
Replies: 15
Views: 2,786
Posted By jpolenek
Re: Control System Bearings

Here are a few photos of how I made anchor plates out of fiberglass. (The yellow things are expanding foam earplugs used to protect the threads.)

Joe Polenek
Forum: Chap 19 - Wings & Ailerons 02-01-2018, 11:28 PM
Replies: 17
Views: 2,850
Posted By jpolenek
Re: doing the wing skin layup alone

The fourth, and final, wing skin layup done alone. :dancbana:
By this point, it was as easy as any other layup.

https://youtu.be/jU9UgHTRdRw


Joe Polenek
Forum: Forum Improvement Ideas 01-15-2018, 02:09 AM
Replies: 56
Views: 8,205
Posted By jpolenek
Re: Forum Costs

Sent.

Joe Polenek
Forum: Chap 19 - Wings & Ailerons 11-27-2017, 11:01 AM
Replies: 9
Views: 351
Posted By jpolenek
Re: Aileron inboard cut line

Yeah, that was my initial thought. However...


The top and bottom chord-wise cuts (i.e. ends of the aileron) should essentially line up in plan view. But this extra line looks like it’s offset by...
Forum: Chap 19 - Wings & Ailerons 11-26-2017, 11:33 AM
Replies: 9
Views: 351
Posted By jpolenek
Re: Aileron inboard cut line

Ok, it all makes sense that the top surface of the wing is cut differently than the bottom, given the aileron cross-section we’re trying to achieve. But this doesn’t explain the additional line in...
Forum: Chap 19 - Wings & Ailerons 11-25-2017, 08:32 PM
Replies: 9
Views: 351
Posted By jpolenek
Aileron inboard cut line

In Cozy plans Chapter 19 Page 8, figure 46 shows where the aileron is cut out of the wing. The drawing has an additional line and arrow near the inboard bottom cut line. (In the attached picture,...
Forum: Chap 19 - Wings & Ailerons 11-16-2017, 03:28 PM
Replies: 2
Views: 137
Posted By jpolenek
trailing edge depression - sanding the micro fill

In chapter 19, page 6, we trowel some dry micro into the T.E. depression in the bottom skin. That part of the bottom airfoil is slightly concave, so when it’s time to sand down the micro fill and...
Forum: Rules and Regulations - USA 08-30-2017, 07:41 PM
Replies: 23
Views: 1,128
Posted By jpolenek
Re: Uh-Oh, Here We Go - State Sales Tax

Just tell them you can't release the information because it's "under audit". ;)

Joe Polenek
Forum: Chap 19 - Wings & Ailerons 08-28-2017, 06:03 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

What I had in mind was dry graphite powder. It doesn’t gum up the way oil or other liquid lubricants might, which is why it’s good for things like lock cylinders. Therefore it should be ok in cold...
Forum: Airframe Modifications 08-28-2017, 08:48 AM
Replies: 2
Views: 1,390
Posted By jpolenek
Re: Acitve Winglets

If these ailerons deflect to “alleviate certain loads” at the wing tip, aren’t they just ‘giving in’ to the vortex-producing pressures that regular winglets would resist and counteract?

Joe Polenek
Forum: Chap 19 - Wings & Ailerons 08-28-2017, 06:50 AM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

Is it 'kosher' to lubricate the rudder cable inside the Nylaflow conduit with graphite powder (the stuff used for locks)?

Joe Polenek
Forum: Just plane canard talk 07-18-2017, 04:15 PM
Replies: 9
Views: 565
Posted By jpolenek
Re: Vacuum Infusion Demo - 2017

You are on my itinerary. :)

Joe
Forum: Just plane canard talk 07-18-2017, 03:26 PM
Replies: 9
Views: 565
Posted By jpolenek
Forum: Chap 19 - Wings & Ailerons 07-18-2017, 02:21 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

Thanks for looking.



Ah, this explains it. I was scaling it to the wrong paper size, so the holes were measuring too small in CAD. At 11x17, everything works out, and the end-to-end length...
Forum: Just plane stupid comments and conversations 07-12-2017, 08:42 PM
Replies: 1
Views: 243
Posted By jpolenek
Spar cap layup

My wife isn't totally on board with this project, so I have to do what I can when she steps out...

https://youtu.be/12DiH5Dcw2o


Joe Polenek
Forum: Chap 19 - Wings & Ailerons 07-12-2017, 02:45 AM
Replies: 27
Views: 1,382
Posted By jpolenek
Forum: Chap 19 - Wings & Ailerons 07-09-2017, 01:29 PM
Replies: 8
Views: 1,427
Posted By jpolenek
Re: Wing Rib Layup

How did you orient your wing for this? Did you do anything special to prevent the upper (overhanging) surface of the layup from pulling away due to gravity before it had enough cure to stick, or did...
Forum: Chap 19 - Wings & Ailerons 07-08-2017, 02:50 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

On the topic of hidden belhorn plans, page A1 says “parts per this full scale drawing”. The page looks like it’s supposed to be printed on 8.5x14 size paper, but when I bring the PDF into CAD at...
Forum: Chap 19 - Wings & Ailerons 06-21-2017, 11:45 AM
Replies: 12
Views: 564
Posted By jpolenek
Re: thicker wing due to filler

Normally that would be the right way to do it, but I'm doing the spar cap a little differently. Once I have the correct trough depth, I over-fill it with UND tape, let it cure, and then mill away...
Forum: Chap 19 - Wings & Ailerons 06-20-2017, 09:59 PM
Replies: 12
Views: 564
Posted By jpolenek
Re: thicker wing due to filler

Here's an update if anyone is interested. After making the micro ridge that brought the spar cap trough to the right depth, the step in the wing surface needed be blended out. To do this, I...
Forum: Chap 19 - Wings & Ailerons 06-19-2017, 01:34 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

Follow-up: It turned out well. Starting at 4.8" aft of the shear web at the wing root (per plans), and passing 1.5" forward of the aileron tip, the straight run of conduit intersected the 1.2" line...
Forum: Chap 19 - Wings & Ailerons 06-16-2017, 05:26 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

That makes sense.

The issue I still see with running it "as close as possible to the outboard tip of the ailerons" is that if it gets close enough to the tip, the conduit would pass through the foam...
Forum: Chap 19 - Wings & Ailerons 06-15-2017, 11:15 PM
Replies: 27
Views: 1,382
Posted By jpolenek
Re: Nylaflow routing for Hidden Bellhorns

The internal belhorn plans say that the cable conduit "must pass as close as possible to the outboard tip of the ailerons...", otherwise "you will not be able to deploy the rudders to their full...
Forum: Chap 19 - Wings & Ailerons 06-13-2017, 11:12 PM
Replies: 12
Views: 564
Posted By jpolenek
Re: thicker wing due to filler

Yes.


Pretty much. The hardshelling should take care of the bulk of filling and sanding, but some will still be needed later to smooth out high spots on top of the skin like reinforcement patches,...
Showing results 1 to 25 of 204

 
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