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Cox Engine of The Month
Schroeder Opposed .020 Twin EBAY
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Schroeder Opposed .020 Twin EBAY
Very cool - I have seen one only once before. Wonder what kind of carb that is?
http://www.ebay.com/itm/RARE-SCHROEDER-COX-PEE-WEE-020-TWIN-CYLINDER-OPPOSED-U-C-MODEL-AIRPLANE-ENGINE-/380405504375?_trksid=p5197.m1374&_trkparms=algo%3DPI.WATCH%26otn%3D8%26po%3DLCA%26ps%3D63%26clkid%3D5978735773181133949#ht_2404wt_1335
http://www.ebay.com/itm/RARE-SCHROEDER-COX-PEE-WEE-020-TWIN-CYLINDER-OPPOSED-U-C-MODEL-AIRPLANE-ENGINE-/380405504375?_trksid=p5197.m1374&_trkparms=algo%3DPI.WATCH%26otn%3D8%26po%3DLCA%26ps%3D63%26clkid%3D5978735773181133949#ht_2404wt_1335
Re: Schroeder Opposed .020 Twin EBAY
I saw that!
Very nice but how would it run?
I have no idea so not worth that much to me,
Still good find Matt.
Very nice but how would it run?
I have no idea so not worth that much to me,
Still good find Matt.
Re: Schroeder Opposed .020 Twin EBAY
I saw that too, cool, wonder what the power is like with the extra drag of the internals? Total displacement is still less than an .049
Cribbs74- Moderator
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Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
twin
I have seen several muti-cylinder Cox engines but never seen one run. I guess they could run. Maybe a u-tube out there in cyber space??
dankar04- Platinum Member
- Posts : 716
Join date : 2011-08-13
Age : 77
Location : Tucson,Az.
Re: Schroeder Opposed .020 Twin EBAY
dankar04 wrote:I have seen several muti-cylinder Cox engines but never seen one run. I guess they could run. Maybe a u-tube out there in cyber space??
Here is a geared twin.
Re: Schroeder Opposed .020 Twin EBAY
nitroairplane wrote:I saw that!
Very nice but how would it run?
I have no idea so not worth that much to me,
Still good find Matt.
The cylinders are clearly offset so it may well fire simultaneously on the two cylinders, like on the G-Mark .12 opposing twin.
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Schroeder Opposed .020 Twin EBAY
No that is true, but it could win the award "engine of the month" nether the less...
Surfer_kris- Diamond Member
- Posts : 1905
Join date : 2010-11-20
Location : Sweden
Re: Schroeder Opposed .020 Twin EBAY
Surfer_kris wrote:No that is true, but it could win the award "engine of the month" nether the less...
lol I think it would if someone here had it.
Speaking of engine of the month.....
Re: Schroeder Opposed .020 Twin EBAY
Good stuff Indra, the Tach numbers on the twin were not that impressive. Prob a function of the gearing. Torque numbers are prob good. No idea of the prop size or pitch which could also have a big affect.
Cribbs74- Moderator
-
Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Schroeder Opposed .020 Twin EBAY
cribbs74 wrote:Good stuff Indra, the Tach numbers on the twin were not that impressive. Prob a function of the gearing. Torque numbers are prob good. No idea of the prop size or pitch which could also have a big affect.
I know unfortunately that video was not mine, I would have one of those by now if I could stay focused but drifted off of that one
That was designed by Andrew.J.Coholic and the name of that builder escapes me.
It was running a MAS 8x4 so pretty decent numbers.
Indra
Re: Schroeder Opposed .020 Twin EBAY
cribbs74 wrote:I saw that too, cool, wonder what the power is like with the extra drag of the internals? Total displacement is still less than an .049
I would guess the thrust-to-weight ratio is not terribly impressive....
Re: Schroeder Opposed .020 Twin EBAY
talking about exotic engines...I found an eisfeld engine on ebay..don't know if i should show it to you guys...
GermanBeez- Platinum Member
- Posts : 1167
Join date : 2011-06-15
Location : Bavaria, Germany
Re: Schroeder Opposed .020 Twin EBAY
If that is AJC’s design then it has gear reduction. The engine gears are 23 teeth and the prop shaft gear is 28 teeth. Thus a prop RPM of 10600 would be an engine RPM of 12900.nitroairplane wrote:cribbs74 wrote:Good stuff Indra, the Tach numbers on the twin were not that impressive. Prob a function of the gearing. Torque numbers are prob good. No idea of the prop size or pitch which could also have a big affect.
I know unfortunately that video was not mine, I would have one of those by now if I could stay focused but drifted off of that one
That was designed by Andrew.J.Coholic and the name of that builder escapes me.
It was running a MAS 8x4 so pretty decent numbers.
Indra
I also made my own version and have run it but didn’t tach it. They are made more as a novelty rather than for performance. The gears rob power.
Al
Big Al- Gold Member
- Posts : 116
Join date : 2011-08-17
Age : 91
Location : Louisiana
Re: Schroeder Opposed .020 Twin EBAY
Big Al wrote:If that is AJC’s design then it has gear reduction. The engine gears are 23 teeth and the prop shaft gear is 28 teeth. Thus a prop RPM of 10600 would be an engine RPM of 12900.nitroairplane wrote:cribbs74 wrote:Good stuff Indra, the Tach numbers on the twin were not that impressive. Prob a function of the gearing. Torque numbers are prob good. No idea of the prop size or pitch which could also have a big affect.
I know unfortunately that video was not mine, I would have one of those by now if I could stay focused but drifted off of that one
That was designed by Andrew.J.Coholic and the name of that builder escapes me.
It was running a MAS 8x4 so pretty decent numbers.
Indra
I also made my own version and have run it but didn’t tach it. They are made more as a novelty rather than for performance. The gears rob power.
Al
Very nice Al!
I wanted to make one to power a lazy bee.
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