K 700 BB
05-29-2013, 06:45 PM
#2
Senior Member
Join Date: Oct 2009
Location: SydneyNew South wales, AUSTRALIA
Posts: 1,346
Likes: 0
Received 4 Likes
on
4 Posts
RE: K 700 BB
I see that you have the 'Mid Night Special' there Derek!
Put two of those together in a Vee twin configuration and you could pass it off as a Harley.
Put two of those together in a Vee twin configuration and you could pass it off as a Harley.
05-29-2013, 07:54 PM
#4
Thread Starter
My Feedback: (2)
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes
on
0 Posts
RE: K 700 BB
Martin,
R/C Carburettor is original fitment. Carb is beautifully made and finished. As is the spinner nut and prop driver. The case is a rough sand casting thickly covered in black high temperature enamel.
It is a heavy beast. Captivating to look at. Rough, and smooth, at the same time. I will put it on the scale and post the weight.
Recycled,
The engine has been run. Just once. It is a 'willing' engine in the starting stakes, but not for the faint of heart. I had to re-tension the ratchet spring on the needle and the tighten the cylinder jacket which came loose during the run. No biggies. It has a really good piston/liner fit. There is no detectable fuel leakage from the unshielded ball raced front bearing. Races are smooth.
The video shows the first and only run.
http://www.youtube.com/watch?v=SDCAjnRpYNg
The noise. You won't hear it on the poor quality play back, but it is impressive. You'd need to be there. There is no provision for a muffler. Frog 249 style porting. I will run it again and post some photographs. A RAM 13 x 6 will be the club of choice. A nylon Top Flite 11 x 8 was installed for the first run. What was I thinking. It dismissed it with impunity. Many times it fired and happily ran backwards to taunt me. Needless to say I received a set of rapped knuckles for the insult.
A bigger, heavier club should tame it.
R/C Carburettor is original fitment. Carb is beautifully made and finished. As is the spinner nut and prop driver. The case is a rough sand casting thickly covered in black high temperature enamel.
It is a heavy beast. Captivating to look at. Rough, and smooth, at the same time. I will put it on the scale and post the weight.
Recycled,
The engine has been run. Just once. It is a 'willing' engine in the starting stakes, but not for the faint of heart. I had to re-tension the ratchet spring on the needle and the tighten the cylinder jacket which came loose during the run. No biggies. It has a really good piston/liner fit. There is no detectable fuel leakage from the unshielded ball raced front bearing. Races are smooth.
The video shows the first and only run.
http://www.youtube.com/watch?v=SDCAjnRpYNg
The noise. You won't hear it on the poor quality play back, but it is impressive. You'd need to be there. There is no provision for a muffler. Frog 249 style porting. I will run it again and post some photographs. A RAM 13 x 6 will be the club of choice. A nylon Top Flite 11 x 8 was installed for the first run. What was I thinking. It dismissed it with impunity. Many times it fired and happily ran backwards to taunt me. Needless to say I received a set of rapped knuckles for the insult.
A bigger, heavier club should tame it.
06-02-2013, 03:26 PM
#7
Senior Member
Join Date: Oct 2009
Location: SydneyNew South wales, AUSTRALIA
Posts: 1,346
Likes: 0
Received 4 Likes
on
4 Posts
RE: K 700 BB
ORIGINAL: fiery
There is no provision for a muffler.
There is no provision for a muffler.
can't help but think that a PAW collector ring/canister muffler could be adapted well enough here.
Simply measure the OD of the liner above the exhaust ports and find a PAW muffler that has a collecter ring ID slightly smaller than that.
Bore out its upper ring so that it easily slides over the threads on the liner but sits on the ledge of the upper exhaust flange and bore out the lower ring to be a firm fit against the lower exhaust port flange.
Hopefully the cooling jacket can engage enough threads to lock the whole thing down.
Sealing the lower ring is going to be difficult and you would really need an undrilled PAW collector ring in order for this to work but its the best that I can think of here.
Cheers.
06-02-2013, 04:17 PM
#8
RE: K 700 BB
if it works will have a quiet engine, really like those collector rings and stack on my PAWs
on my PAW 40 outstanding, most compact compared to to a standard muffler, no issues with clearance on the plane martin
on my PAW 40 outstanding, most compact compared to to a standard muffler, no issues with clearance on the plane martin
06-02-2013, 04:41 PM
#9
Thread Starter
My Feedback: (2)
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes
on
0 Posts
RE: K 700 BB
I ran it on the week-end.
-
Good news: A larger heavier prop really tamed it. I bolted up a JXF 14 x 6. It started easily after a choked prime and four or five flicks. It ran well.
-
Bad news: The contra-piston is fitted too tightly. It 'locked up' when hot. It would not run back even when started cold. No blow-by at all though. I did not persist. The sound of a large over compressed diesel running is not music to the ears.
-
It needs a collector ring and silencer. I will send it to Mr Owen to dissassemble and sort the tight contra-piston. The engine features a very thick fibre washer seal between the case top and cylinder flange under the exhaust port. A machined alloy spacer washer with the same nominal thickness as the fibre washer, same ID, and a larger OD would be an easy solution facilitating fitment of a PAW collector ring. I am sure a word in Paul or Tony Eifflaender's ear would result in the supply of an undrilled collector ring to do the job.
So I will send this beast off and will report further in due course once it is returned.
-
Good news: A larger heavier prop really tamed it. I bolted up a JXF 14 x 6. It started easily after a choked prime and four or five flicks. It ran well.
-
Bad news: The contra-piston is fitted too tightly. It 'locked up' when hot. It would not run back even when started cold. No blow-by at all though. I did not persist. The sound of a large over compressed diesel running is not music to the ears.
-
It needs a collector ring and silencer. I will send it to Mr Owen to dissassemble and sort the tight contra-piston. The engine features a very thick fibre washer seal between the case top and cylinder flange under the exhaust port. A machined alloy spacer washer with the same nominal thickness as the fibre washer, same ID, and a larger OD would be an easy solution facilitating fitment of a PAW collector ring. I am sure a word in Paul or Tony Eifflaender's ear would result in the supply of an undrilled collector ring to do the job.
So I will send this beast off and will report further in due course once it is returned.
06-03-2013, 02:05 PM
#10
Senior Member
Join Date: Oct 2009
Location: SydneyNew South wales, AUSTRALIA
Posts: 1,346
Likes: 0
Received 4 Likes
on
4 Posts
RE: K 700 BB
ORIGINAL: fiery
The engine features a very thick fibre washer seal between the case top and cylinder flange under the exhaust port. A machined alloy spacer washer with the same nominal thickness as the fibre washer, same ID, and a larger OD would be an easy solution facilitating fitment of a PAW collector ring. I am sure a word in Paul or Tony Eifflaender's ear would result in the supply of an undrilled collector ring to do the job.
So I will send this beast off and will report further in due course once it is returned.
The engine features a very thick fibre washer seal between the case top and cylinder flange under the exhaust port. A machined alloy spacer washer with the same nominal thickness as the fibre washer, same ID, and a larger OD would be an easy solution facilitating fitment of a PAW collector ring. I am sure a word in Paul or Tony Eifflaender's ear would result in the supply of an undrilled collector ring to do the job.
So I will send this beast off and will report further in due course once it is returned.
So it seems like an elegant solution to substitute that for a mounting plate and that way there is no need to pinch the upper collector between the fins and exhaust.
I like it!
06-03-2013, 08:59 PM
#11
Thread Starter
My Feedback: (2)
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes
on
0 Posts
RE: K 700 BB
For some reason I have a weakness for these large traditional diesels.
I have a K600 BB which has a collector ring installed. I ran it. It went very well, but had overly tight / lumpy domestic Indian races.
On stripping it down I discovered while fitment of the front race was good, the main race was appalling. Too tight on the shaft and too loose in the case. I bought some new races for it.
One day soon I will re-assemble and run it.
These engines are of sound design. However they are let down in some instances by poor materials, and in others; by indifferent workmanship.
All issues aside I find them fun to tinker with, and they are totally "unique".
I have a K600 BB which has a collector ring installed. I ran it. It went very well, but had overly tight / lumpy domestic Indian races.
On stripping it down I discovered while fitment of the front race was good, the main race was appalling. Too tight on the shaft and too loose in the case. I bought some new races for it.
One day soon I will re-assemble and run it.
These engines are of sound design. However they are let down in some instances by poor materials, and in others; by indifferent workmanship.
All issues aside I find them fun to tinker with, and they are totally "unique".
07-27-2015, 06:59 PM
#12
Thread Starter
My Feedback: (2)
Join Date: Feb 2002
Location: Hervey Bay Queensland, AUSTRALIA
Posts: 2,995
Likes: 0
Received 0 Likes
on
0 Posts
Beast is sorted and now has a home. Running manners are impeccable. Who would have guessed.
https://www.youtube.com/watch?v=byLo7O776jI
https://www.youtube.com/watch?v=CxCq5wAus0Q
https://www.youtube.com/watch?v=byLo7O776jI
https://www.youtube.com/watch?v=CxCq5wAus0Q
