The most beautiful O.S engines ever made
12-07-2016, 05:19 AM
#76
12-07-2016, 05:55 AM
#77
12-07-2016, 08:16 AM
#80
12-07-2016, 08:23 AM
#81
Hi Bax, Tower Hobbies dropped GMS, Super Tigre, Thunder Tiger, and Magnum in the last few years. Only OS is left. However, as nice as the OS engines are, most of us poor slobs can't afford the new OS engines. Are there any plans at Tower Hobbies to sell a lower cost brand of glow engines?
12-07-2016, 10:35 AM
#83
12-07-2016, 11:33 AM
#85
It's "precision" airbleed. Actually the small engines I have with air bleed carbs are so simple to tune. Heck, some engines in that size don't even have any low speed adjustment such as AP 15 and Norvel 15 BigMig. They don't need them.
12-07-2016, 12:05 PM
#86
(OS did that on the .10 FSR for instance, where they didn't bother to drill and thread the casted bulge for the airbleed screw...)
12-07-2016, 12:21 PM
#87
My Feedback: (102)
Join Date: Dec 2001
Location: Colonial Beach, VA
Posts: 20,370
Likes: 0
Received 25 Likes
on
25 Posts
When they get that small the airflow velocity does a good enough job regulating the fuel draw. My Saito .30 is an example, it has a non metered carb with an airbleed and the throttling is very linear. If you're going to hammer on OS for airbleed carbs you better bash Enya's first, they have more of them than OS.
12-07-2016, 12:34 PM
#89
When they get that small the airflow velocity does a good enough job regulating the fuel draw. My Saito .30 is an example, it has a non metered carb with an airbleed and the throttling is very linear. If you're going to hammer on OS for airbleed carbs you better bash Enya's first, they have more of them than OS.
12-07-2016, 12:38 PM
#91
12-07-2016, 12:54 PM
#92
Senior Member
Thread Starter
My Feedback: (17)
Join Date: Apr 2004
Location: Post Falls Idaho
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
I've noticed that the few people who don't care for OS engines, seem to have more of a hatred for them instead of just a disliking.
I'm not judging, we all have are preferred brand.
I'm not judging, we all have are preferred brand.
12-07-2016, 01:07 PM
#93
No hatred or dislike from me. I consider OS engines on par with the other brands, nothing special to me.
12-07-2016, 01:11 PM
#94
I do have plenty of OS engines and use them too, I just don't think that they are much above the rest in anyway. The true ABC and AAC from Enya though, they are something well worth to experience. There are also great engines from Novarossi/Rex, once you see their build quality one can only laugh at the level that OS air-plane engines provides. Yes, they where once at the top but that was a looong time ago...
The AP wasp is pretty useless at the low-end with no compensation at all. You'll need to at least add a fixed airbleed to the carb. This was done on the Norvels, but they seem to have missed that when they copied them.
The Norvel .15 engines came with twin needle carbs, at least the two I have, these give excellent throttling abilities, rock stable at around 2200rpm (on an 8x4 prop).
If OS would make a true ABC .11 engine I would certainly be interested, but they would have to be reasonably prised too.
Last edited by Mr Cox; 12-07-2016 at 01:19 PM.
12-07-2016, 01:15 PM
#95
12-07-2016, 01:24 PM
#96
The lack of low-end adjustment would be a problem to some. But I am using those engines on planes that handlaunch and belly land. So, I really don't need an idle below 4000 rpms anyway.
I have an older Norvel 15 BigMig (the bushing version). That has no low end adjustment. I also have a Norvel 15 AME (ball bearings version), that has twin needle carbs.
12-07-2016, 02:30 PM
#97
When they get that small the airflow velocity does a good enough job regulating the fuel draw. My Saito .30 is an example, it has a non metered carb with an airbleed and the throttling is very linear. If you're going to hammer on OS for airbleed carbs you better bash Enya's first, they have more of them than OS.
I only hammered on the airbleed carb on the $700 engines. I know airbleed carb's can be every bit as good as a twin needle carb, but on a $700 "show piece"? That's just cheap. Comparing an Enya metered airbleed type carb to an OS airbleed carb is like comparing Lamborghini to Ford.
12-07-2016, 02:34 PM
#98
For me, what might sound like a hatred is mainly stemming from OS fans who thinks that OS are that much better than anything else. It is their sect behaviour that puts me off, together with the false marketing from OS and their inferior products...
I do have plenty of OS engines and use them too, I just don't think that they are much above the rest in anyway. The true ABC and AAC from Enya though, they are something well worth to experience. There are also great engines from Novarossi/Rex, once you see their build quality one can only laugh at the level that OS air-plane engines provides. Yes, they where once at the top but that was a looong time ago...
The AP wasp is pretty useless at the low-end with no compensation at all. You'll need to at least add a fixed airbleed to the carb. This was done on the Norvels, but they seem to have missed that when they copied them.
The Norvel .15 engines came with twin needle carbs, at least the two I have, these give excellent throttling abilities, rock stable at around 2200rpm (on an 8x4 prop).
If OS would make a true ABC .11 engine I would certainly be interested, but they would have to be reasonably prised too.
I do have plenty of OS engines and use them too, I just don't think that they are much above the rest in anyway. The true ABC and AAC from Enya though, they are something well worth to experience. There are also great engines from Novarossi/Rex, once you see their build quality one can only laugh at the level that OS air-plane engines provides. Yes, they where once at the top but that was a looong time ago...
The AP wasp is pretty useless at the low-end with no compensation at all. You'll need to at least add a fixed airbleed to the carb. This was done on the Norvels, but they seem to have missed that when they copied them.
The Norvel .15 engines came with twin needle carbs, at least the two I have, these give excellent throttling abilities, rock stable at around 2200rpm (on an 8x4 prop).
If OS would make a true ABC .11 engine I would certainly be interested, but they would have to be reasonably prised too.
OS has terrific marketing though..
12-07-2016, 02:45 PM
#99
Senior Member
Thread Starter
My Feedback: (17)
Join Date: Apr 2004
Location: Post Falls Idaho
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
I'm a big OS fan true, though my favorite motors from them are the larger ringed motors, I have 2 91fx and 1 120ax and a 50sx that's ringed, I love the 120 and 91 for there low weight and good power, I hardly have to adjust them at the field.
I've had good luck with the 46ax as far as how much power they put out and how easy it is to tune them, I am let down with the plating that's starting to peel, when you pay $150 for a 7.5cc motor you expect the best.
I've had good luck with the 46ax as far as how much power they put out and how easy it is to tune them, I am let down with the plating that's starting to peel, when you pay $150 for a 7.5cc motor you expect the best.
12-07-2016, 02:51 PM
#100
Senior Member
Join Date: Apr 2005
Location: goolwasa, AUSTRALIA
Posts: 1,680
Likes: 0
Received 0 Likes
on
0 Posts
Ive had more trouble with Thunder Tiger engines than any other . O.S. none , thats why I jump to their defense . Trust me if they gave me grief I would be the 1st to say . Im one of the first to get something new but if its a dud Ill be the 1st to jump off the bandwagon too . If a engine runs great with a air bleed carb whats the problem ? Cheers