GROSSI ENGINES
03-26-2008, 03:34 AM
#1
Tech Master
Thread Starter
iTrader: (3)
Join Date: Dec 2001
Location: Costa Del Sol, Marbella, Spain www.bradir.net
Posts: 1,456
Trader Rating: 3 (100%+)
GROSSI ENGINES
this looks interesting 
found this link at 3hobby.net (thanks sow!)
http://www.grossiengines.com/english.htm
found this link at 3hobby.net (thanks sow!)
http://www.grossiengines.com/english.htm
03-26-2008, 06:20 AM
#2
A very ugly engine but an interesting concept.
No rotating inlet through the crankshaft but with an rotating disc which makes the crankshaft very smal and light and with the small bearings very light.
Otherwise it can cause huge tolerances because so far I can see the disc is a spperate part and can cause some degrees changes if the mounting has some play
No rotating inlet through the crankshaft but with an rotating disc which makes the crankshaft very smal and light and with the small bearings very light.
Otherwise it can cause huge tolerances because so far I can see the disc is a spperate part and can cause some degrees changes if the mounting has some play
03-26-2008, 07:04 AM
#3
This is a very old concept, just updated slightly. Airplane engines in the late 40's and 50's used disc type intake valves almost exclusively. The real difference with those was that the intake was at the rear of the case and the carb was mounted on the back of the engine. They were also either "front" exhaust or side exhaust in that configuration. I'd be very interested to see how this engine runs. There does seem to be a lot of material around the cylinder though and it may over cool the combustion chamber? Hard to say without testing.
03-26-2008, 07:05 AM
#4
Nothing new and innovative. Just old ideas brought back with very poor craftmanship.
1 pic is engine from back in 1999 and second from 1997 and both comcepts came from Russia.
1 pic is engine from back in 1999 and second from 1997 and both comcepts came from Russia.
03-26-2008, 09:31 AM
#5
I gotta admit, those have got to be some of the funkiest looking engines Ive seen in quite awhile. They have some really funky looking internals(certain parts only). And some funky looking cooling heads to them.
03-26-2008, 10:52 AM
#6
It looks more like a gokart engine....
I did take a further look and did see a lot of filling materials to keep the volume under the piston small, then you can ask why such a large crankcase is used if it is compleetje filled up from inside.
Also a roling bearing on the crankpin seems interesting....
I did take a further look and did see a lot of filling materials to keep the volume under the piston small, then you can ask why such a large crankcase is used if it is compleetje filled up from inside.
Also a roling bearing on the crankpin seems interesting....
03-26-2008, 08:08 PM
#7
Needle bearing for conrod is great achivment.
In my expirience back in the days when I was racing on speed boats and airplanes we tryed many times to put needles on .15 motors and never been succesfull, not just me-nobody could do it and feel safe 9nobody could predict how long they will last-1 tank, 10 tanks, gallon ...). We did it, but it always end up by crashing needles. There is not enough space on anything less then 3.5 cc engine. On 3.5 cc it was done and last for couple of years (literaly). On 6.5 and higher it last as long as you run cranck.
I would be happy to see if somebody can put needle bearing on 12 motor, not talking that conrod needs to be alloy steel, that will open "can with worms". But if somebody can do that, then they can reduce oil content by many %% and conrod will ast a long time.
In my expirience back in the days when I was racing on speed boats and airplanes we tryed many times to put needles on .15 motors and never been succesfull, not just me-nobody could do it and feel safe 9nobody could predict how long they will last-1 tank, 10 tanks, gallon ...). We did it, but it always end up by crashing needles. There is not enough space on anything less then 3.5 cc engine. On 3.5 cc it was done and last for couple of years (literaly). On 6.5 and higher it last as long as you run cranck.
I would be happy to see if somebody can put needle bearing on 12 motor, not talking that conrod needs to be alloy steel, that will open "can with worms". But if somebody can do that, then they can reduce oil content by many %% and conrod will ast a long time.
03-27-2008, 12:59 AM
#8
Tech Initiate
Looks very much like a common rotary valve go kart engine.
03-27-2008, 02:38 AM
#9
Tech Adept
The tethered speedmodelcars have used rotary valve and front exhaust engines for eternity. There it's a necessity because of the arrangement of the drivetrain (center mounted engine with both output shaft and pipe pointed towards the rear), like that:
http://www.amrca.com/cars.htm
But from what I've heard, the research shows that "our" style of motors (with crank valve) make more power, so some tether car racers are actually building new cars around these engines... FWD, as funny as it seems, but it's the only way We'll see how they will do in races.
http://www.amrca.com/cars.htm
But from what I've heard, the research shows that "our" style of motors (with crank valve) make more power, so some tether car racers are actually building new cars around these engines... FWD, as funny as it seems, but it's the only way
We'll see how they will do in races.
09-16-2010, 06:44 PM
#10
Hi guys! Just wanted to drop a line and let you know that I am currently helping GROSSI Engines with representation (Sales) in the United States. Anyone interested in Ordering Direct or starting an account for your hobby shop... feel free to contact me via PRIVATE MESSAGE... please leave your phone number and I will get to you as soon as I can.
09-16-2010, 06:49 PM
#11
A little info on them would be nice. Links, pics, specs, etc.
09-18-2010, 12:40 PM
#12
ASCARI 3.5 details
No problem my friends...
The ASCARI 3.5 Liquid Cooled Off-Road Engine
Capacity- 3.49cc
Power- 2.9HP
RPM- 40,000
Bore- 15.9mm
Stroke- 17.4mm
Cylinder- Made from Single fusion piece
Intake- Rotary Valve (magnetic rotary valve system)
Carb- Fully rebuilable and adjustable
Cooling- 50/50 distilled water and anti-freeze (aluminum radiator)
Weight- 320 grams with cooling system
ALL GROSSI MOTOR HAVE A 24 MONTH WARRANTY
100% manufactured in ITALY
NOW TAKING NORTH AMERICAN ORDERS- SEND ME PRIVATE MESSAGE FOR DEALER INFO
The ASCARI 3.5 Liquid Cooled Off-Road Engine
Capacity- 3.49cc
Power- 2.9HP
RPM- 40,000
Bore- 15.9mm
Stroke- 17.4mm
Cylinder- Made from Single fusion piece
Intake- Rotary Valve (magnetic rotary valve system)
Carb- Fully rebuilable and adjustable
Cooling- 50/50 distilled water and anti-freeze (aluminum radiator)
Weight- 320 grams with cooling system
ALL GROSSI MOTOR HAVE A 24 MONTH WARRANTY
100% manufactured in ITALY
NOW TAKING NORTH AMERICAN ORDERS- SEND ME PRIVATE MESSAGE FOR DEALER INFO
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
