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f.kyle(at)sympatico.ca
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 Posted: Fri Jun 07, 2013 5:59 am Post subject: Spar pin (was You'll cry..) |
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Fred,
Wow, you hit a note there, that lines up with what I’ve come to believe. By leaning ‘way back from the belly panel opening, I can see the pintle and believe that an extended hacksaw blade of about 30 inches would rest on it and begin sawing. The blade is attached to a speed-controlled scroll saw so we can start slowly and establish an early cut to follow. The route would be the same, near the back of the panel hole, up behind the pitch tube and behind the aileron bracket. I mean to guide it with the boroscope, with a buddy who has taken an interest at the hangar.
Due to a combination of lassitude and ignorance, I can’t seem to achieve the Matronics graphic skills for a photo, but will send it directly.
Cheers, Ferg
Ferg...there is a space of 1.75" (45mm) between the face of my tank and
the aft edge of the 0.5" rod which connects to the aileron friction
plate. I'm suggesting that this gap would allow ample space for a
reciprocating saw blade of proper length to saw your pintle from
below...the trick will be to establish some reference points so that the
opening for the saw can be determined with some accuracy.
My suggestion would be to use a hole saw to cut a hole in the bottom of
the fuselage...say about 2" in diameter...if you make hatch marks for
the center point extending beyond the circumference of the circle, they
would make it easy to align the cut-out circle when you go to patch it
in once the problem's solved and your wings are off.
To locate the center point of your hole, perhaps starting from a
reference line drawn between the two fuel tank access holes would
do...?...if this sounds like a sensible approach to you (and to others
lurking on the list), I can give you a dimension fore and aft from that
line, and a second dimension off the centerline of the fuselage
bottom to locate the center point for the hole.
Let me know if you would like me to determine those dimensions and
establish that point.
My suggestions are based on the idea that a solution lies in finding a
way to cut off your "tapered pintle" which will then allow for you to
drive out the remaining portion which is now stuck in the spar holes.
But perhaps more experienced minds can find a better alternative.
Fred
[quote][b]
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clivesutton
Joined: 23 Jan 2013
Posts: 187
Location: KENILWORTH
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| Posted: Fri Jun 07, 2013 7:35 am Post subject: Re: Spar pin (was You'll cry..) |
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Gentlemen, if I may offer a late suggestion, a wire saw might bring something - here's a link: http://www.amazon.co.uk/Commando-Stainless-Steel-Cutter-Strong/dp/B000O6EL50
These things have the advantage of not requiring a 'reciprocating gap' beyond the item being cut, and possibly quite a small entry and exit slot in the belly - though you'd need to thread it over the item to be cut somehow of course. I'm sure the handle rings could be detached somehow to make this 'threading' operation easier . . .
Like BCB's other products, worth carrying in the aircraft in a survival kit too.
Clive. 
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peterz(at)zutrasoft.com
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| Posted: Fri Jun 07, 2013 8:00 am Post subject: Spar pin (was You'll cry..) |
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No idea if this is of any value or not, but might a campers thin "rope saw" may be of use to get into a tight space? I guess threading it would be difficult tho.
On Jun 7, 2013, at 10:02 AM, <f.kyle(at)sympatico.ca (f.kyle(at)sympatico.ca)> wrote:
[quote] <![endif]--> <![endif]-->
Fred,
Wow, you hit a note there, that lines up with what I’ve come to believe. By leaning ‘way back from the belly panel opening, I can see the pintle and believe that an extended hacksaw blade of about 30 inches would rest on it and begin sawing. The blade is attached to a speed-controlled scroll saw so we can start slowly and establish an early cut to follow. The route would be the same, near the back of the panel hole, up behind the pitch tube and behind the aileron bracket. I mean to guide it with the boroscope, with a buddy who has taken an interest at the hangar.
Due to a combination of lassitude and ignorance, I can’t seem to achieve the Matronics graphic skills for a photo, but will send it directly.
Cheers, Ferg
Ferg...there is a space of 1.75" (45mm) between the face of my tank and
the aft edge of the 0.5" rod which connects to the aileron friction
plate. I'm suggesting that this gap would allow ample space for a
reciprocating saw blade of proper length to saw your pintle from
below...the trick will be to establish some reference points so that the
opening for the saw can be determined with some accuracy.
My suggestion would be to use a hole saw to cut a hole in the bottom of
the fuselage...say about 2" in diameter...if you make hatch marks for
the center point extending beyond the circumference of the circle, they
would make it easy to align the cut-out circle when you go to patch it
in once the problem's solved and your wings are off.
To locate the center point of your hole, perhaps starting from a
reference line drawn between the two fuel tank access holes would
do...?...if this sounds like a sensible approach to you (and to others
lurking on the list), I can give you a dimension fore and aft from that
line, and a second dimension off the centerline of the fuselage
bottom to locate the center point for the hole.
Let me know if you would like me to determine those dimensions and
establish that point.
My suggestions are based on the idea that a solution lies in finding a
way to cut off your "tapered pintle" which will then allow for you to
drive out the remaining portion which is now stuck in the spar holes.
But perhaps more experienced minds can find a better alternative.
Fred
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peterz(at)zutrasoft.com
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| Posted: Fri Jun 07, 2013 8:01 am Post subject: Spar pin (was You'll cry..) |
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Oops.....collision, apologies for my duplicate post...
Cheers,
Pete
On Jun 7, 2013, at 11:35 AM, "gtagr" <clive.maf(at)googlemail.com> wrote:
| Quote: |
Gentlemen, if I may offer a late suggestion, a wire saw might bring something - here's a link: http://www.amazon.co.uk/Commando-Stainless-Steel-Cutter-Strong/dp/B000O6EL50
These things have the advantage of not requiring a 'reciprocating gap' beyond the item being cut, and possibly quite a small entry and exit slot in the belly - though you'd need to thread it over the item to be cut somehow of course. I'm sure the handle rings could be detached somehow to make this 'threading' operation easier . . .
Like BCB's other products, worth carrying in the aircraft in a survival kit too.
Clive.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=402210#402210
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