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#Post#: 12407--------------------------------------------------
Mcculloch bp-1 bp1
By: mweba Date: October 20, 2012, 9:24 pm
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Started tear down on my project saw. Will try to pile all
things learned into this thread.
(HTM) http://farm9.staticflickr.com/8056/8107268242_58cc76c278_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8107268242/
100_4956
(HTM) http://www.flickr.com/photos/mweba1/8107268242/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
(HTM) http://farm9.staticflickr.com/8333/8107254473_fa2010bcc6_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8107254473/
100_4957
(HTM) http://www.flickr.com/photos/mweba1/8107254473/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
(HTM) http://farm9.staticflickr.com/8328/8107250011_ed8fafcd1c_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8107250011/
100_4958
(HTM) http://www.flickr.com/photos/mweba1/8107250011/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
(HTM) http://farm9.staticflickr.com/8184/8107250696_83f6579d1d_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8107250696/
100_4961
(HTM) http://www.flickr.com/photos/mweba1/8107250696/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
#Post#: 12408--------------------------------------------------
Re: bp-1
By: mweba Date: October 20, 2012, 9:30 pm
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Balanced piston/valve
(HTM) http://farm9.staticflickr.com/8192/8107245341_0dd97ddf46_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8107245341/
100_4959
(HTM) http://www.flickr.com/photos/mweba1/8107245341/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
B piston sleeve.
(HTM) http://farm9.staticflickr.com/8048/8106651999_1b9e013603_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8106651999/
Bp-1 balanced piston sleave
(HTM) http://www.flickr.com/photos/mweba1/8106651999/
by mweba1
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on Flickr
Cylinder
(HTM) http://farm9.staticflickr.com/8043/8106661266_523647fa85_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8106661266/
Bp-1 cylinder
(HTM) http://www.flickr.com/photos/mweba1/8106661266/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
Crank assembly.
(HTM) http://farm9.staticflickr.com/8191/8106659942_c58714d6d8_c.jpg
(HTM) http://www.flickr.com/photos/mweba1/8106659942/
Bp-1 crank
(HTM) http://www.flickr.com/photos/mweba1/8106659942/
by mweba1
(HTM) http://www.flickr.com/people/mweba1/,
on Flickr
#Post#: 12409--------------------------------------------------
Re: bp-1
By: mweba Date: October 20, 2012, 9:32 pm
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Rambling commentary.....
(HTM) http://www.youtube.com/watch?v=WhJ4ACYzVSE
(HTM) http://www.youtube.com/watch?v=WhJ4ACYzVSE
#Post#: 12410--------------------------------------------------
Re: bp-1
By: Chainsawrepair Date: October 20, 2012, 10:02 pm
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I would have took one look at that
[IMG]
(HTM) http://i101.photobucket.com/albums/m73/SCARguild/emotes/jaw-dropping.gif[/img]<br
/>and ran.
Will be watching to learn more.
[IMG]
(HTM) http://i717.photobucket.com/albums/ww173/prestonjjrtr/Congrats/53950660.gif[/img]
#Post#: 12414--------------------------------------------------
Re: bp-1
By: pete Date: October 21, 2012, 5:20 am
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Man I"M green with envy to me a bp1 would be the icing on the
cake for my collection keep it and thanks for the vids and
pics
#Post#: 12438--------------------------------------------------
Re: bp-1
By: Al Smith Date: October 21, 2012, 10:23 pm
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I've seen several but never one that actually ran .
#Post#: 12478--------------------------------------------------
Re: bp-1
By: mweba Date: October 24, 2012, 8:26 am
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[quote author=Al Smith link=topic=1255.msg12438#msg12438
date=1350876213]
I've seen several but never one that actually ran .
[/quote]
I've run one that has been gone through. They have surprising
power and rev quite high.
#Post#: 12488--------------------------------------------------
Re: bp-1
By: Al Smith Date: October 24, 2012, 5:58 pm
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Oh they made a big deal about it ,something like 14,000 RPM .I
suppose they thought it was something for time but I've got
some 10 series that will crank on at over 15,000 .
That said though a very interesting design .
#Post#: 12563--------------------------------------------------
Re: bp-1
By: pete Date: October 29, 2012, 7:38 am
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I had the great pleasure of seeing my first BP! s this weekend
got to hold one and have my photo taken with it
Both are runners I really enjoyed my day
#Post#: 12581--------------------------------------------------
Re: bp-1
By: Al Smith Date: October 30, 2012, 8:40 am
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Now I kind of wonder what the real reason was they abandoned
that design .Supposidley it was because of fear the throttle
could stick and engine blow up like a stick of tnt .
I'm not sure that theory is really why and the reason being
even that long ago they knew about zener diodes that break down
on a reverse bias voltage build up .
Any magneto at speed produces a higher voltage as RPMs' increase
until point of coil saturation .I should have thought they could
have built a limiting coil if they really had wanted to
.It'simple ,once you cut off the spark the engine can only run
as fast as the spark can get there .
I doubt we'll ever know the real reason because anybody involved
with it has long ago went to the here after .So it will remain
as the never answered question .
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