Mark Dickens

Mark Dickens

Well Known Member
Patron
On page 45-05, you are instructed to "Trim the top cowl and bottom cowl to the scribe lines around the air inlets and spinner cutout as shown.".

My first question concerns the scribe lines referenced by step 7. The scribe line for the outer air intake (see photo below) is about 5/8-3/4" down, but the drawing seems to indicate a much smaller trim area. So, am I to trim that area down all the way to the scribe line? I know that seems a stupid question, but the drawing indicates a much smaller area. Making a mistake here would be very very bad.

IMG_2396.png

My second question involves the trimming the left air intake (drawing inconveniently left out by Vans). The scribe line accommodates the air intake for the engine and so the scribe lines are different from the right side of the cowl. Before I cut all that out, I just wanted to check that that is intended for removal at this point in the instructions. See below

IMG_2397.png
 
Ah, I had the EXP119 bottom cowl, so could comment on that one, but there could be some mold differences. And I did go just before the scribe line, so basically sanded to it as I got through test fitting.

From my builder log for section 45-05
"I trimmed the oil door and nose gear scribe lines.
I then placed both top and bottom to check on the horizontal scribe lines, looks ok and the MT spinner is basically the same diameter, so I'm proceeding with cutting step 5.
For step 3, I've done the top cowl to the scribe lines, but the bottom cowl, I've done the spinner area to the scribe lines, but nothing more. Want to see more fitting before I do more cutting in that area."

eaabuilderslog.org

EAABuildersLog.org - Free aircraft builders log website.

EAABuildersLog.org is a airplane builders log website to store your projects on the web for free. The EAA (Experimental Aircraft Association, Inc.) provides this website for it's members for free..
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I wouldn't trust the scribe lines at all. Based on most of the fiberglass in my kit, I found the scribe lines to be more of a hindrance than a benefit. I learned on the very first piece that using the scribe line will cost you time and possibly a replacement part. That proved to be the case on the majority of the fiberglass parts.

I'm not sure why they even bother with scribe lines. That being said, trimming to the scribe lines will teach you to scarf properly!
 
Reflex said:
I wouldn't trust the scribe lines at all. Based on most of the fiberglass in my kit, I found the scribe lines to be more of a hindrance than a benefit. I learned on the very first piece that using the scribe line will cost you time and possibly a replacement part. That proved to be the case on the majority of the fiberglass parts.

I'm not sure why they even bother with scribe lines. That being said, trimming to the scribe lines will teach you to scarf properly!
Click to expand...
Yeah, I'll trim it but not as aggressively as the trim lines would indicate.
 
lipper03 said:
Ah, I had the EXP119 bottom cowl, so could comment on that one, but there could be some mold differences. And I did go just before the scribe line, so basically sanded to it as I got through test fitting.

From my builder log for section 45-05
"I trimmed the oil door and nose gear scribe lines.
I then placed both top and bottom to check on the horizontal scribe lines, looks ok and the MT spinner is basically the same diameter, so I'm proceeding with cutting step 5.
For step 3, I've done the top cowl to the scribe lines, but the bottom cowl, I've done the spinner area to the scribe lines, but nothing more. Want to see more fitting before I do more cutting in that area."

eaabuilderslog.org

EAABuildersLog.org - Free aircraft builders log website.

EAABuildersLog.org is a airplane builders log website to store your projects on the web for free. The EAA (Experimental Aircraft Association, Inc.) provides this website for it's members for free..
eaabuilderslog.org eaabuilderslog.org
Click to expand...
OK, so can you comment on the EXP-119 for those of us at that step? I’m about to start cutting.
 
lipper03 said:
What else are you interested in? Happy to help.
Click to expand...
I don’t know, you said you could comment on the EXP-119. What would you tell someone cutting the cowls for a -119? Should I follow all the scribe lines closely? Is there anywhere I should keep the lines intact? Places to go beyond the lines?
 
stigaro said:
I don’t know, you said you could comment on the EXP-119. What would you tell someone cutting the cowls for a -119? Should I follow all the scribe lines closely? Is there anywhere I should keep the lines intact? Places to go beyond the lines?
Click to expand...
Did you even read my post or check out my log? I wrote what I did and I have lots of pictures, so the attitude needs to get checked sir. Folks here are happy to help, including me, but the tone of your message is not coming across well.
 
lipper03 said:
Did you even read my post or check out my log? I wrote what I did and I have lots of pictures, so the attitude needs to get checked sir. Folks here are happy to help, including me, but the tone of your message is not coming across well.
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Yeah, not sure what to ask and I apologize if it sounded flippant. Thought you had some general advice to give as you suggested such. Did not check out your log, but will do so.
 
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