Announcement

**electricsceadu** · 24-12-2012, 08:29 PM

a bergan or vario gasser with a zenoha would be a better bet than the os gasser in a 90 airframe
if you're worried about fuel in a 90 then fit a 60 or 70 glow motor in it

**trillian** · 24-12-2012, 09:32 PM

I don't know if these are actually being sold just yet but I'll be curious to hear the reviews once they are in people's helis being flown in the real world.

If it actually does produce 2.76 hp then it will be roughly inbetween a .70 and .91 nitro. One potential issue is the max horsepower is at 14000rpm, so stock gearing in most 90 size airframes is going to result in a pretty low headspeed.

**bish** · 24-12-2012, 10:30 PM

Get one on order Gaz it would be very interesting

**pgkevet** · 24-12-2012, 10:51 PM

Originally posted by trillian View Post

I don't know if these are actually being sold just yet but I'll be curious to hear the reviews once they are in people's helis being flown in the real world.

If it actually does produce 2.76 hp then it will be roughly inbetween a .70 and .91 nitro. One potential issue is the max horsepower is at 14000rpm, so stock gearing in most 90 size airframes is going to result in a pretty low headspeed.

Not so bad of runnig higher headpseeds and having it peak HP as it bogs slightly..also how well the hatori can works when they release it. If it could be shoehorned into a 50 size model with 620 blades then it might be cool.

----sorry, I accidentally hit 'edit' and now it won't let me just erase the bit I added :-( ---trillian

**trillian** · 24-12-2012, 11:22 PM

Not so bad of runnig higher headpseeds and having it peak HP as it bogs slightly..also how well the hatori can works when they release it. If it could be shoehorned into a 50 size model with 620 blades then it might be cool.

What I was going to say is, I think you'd still want about 1850 at peak power but on airframes geared for a .91 nitro you'll end up closer to 1750. If you could fit it in a .50 size airframe it would be a rocket!

**electricsceadu** · 24-12-2012, 11:35 PM

overheating will be a big issue with this engine in a heli
a plane may be different story

**trillian** · 24-12-2012, 11:44 PM

Originally posted by electricsceadu View Post

overheating will be a big issue with this engine in a heli
a plane may be different story

Yeah, which is where the .50 size airframe might have issues as the fan is smaller and meant to be spinning much faster.

**pgkevet** · 25-12-2012, 07:14 AM

Cooling has always been the issue with gasser engines. My hope would be that by using the lower overall mass here compared to the zenoah style that heat can escape better. There's been all sorts of novel ideas for additional cooling that might be improved on - most simply different shrouds with augmented electric fans.

What was the nae of that 50 seze heli that sadly failed,,designed as a cheap beater model made from engineering plastics with a clutch capable of taking a 90 engine, a snorkel to reduce mud entry in crashes and cheap parts?

**JoeBailey** · 25-12-2012, 09:52 AM

Os gt15hz

The pantera
You can still get them but there just a bit old hat ish now.

I wonder if I could shoe horn one into a fury 55. They managed a modified g23 in one so this should fit nicely.

**pgkevet** · 25-12-2012, 10:11 AM

Thanks for the reminder.. the pantera it was. It might be old hat but the concept was/is a great idea and certainly a platform for shoving an oversized engine into a heli!

A fair chance Helibug will knock out some frame sets for something align?

**JoeBailey** · 25-12-2012, 02:43 PM

Os gt15hz

Thinking about it the only thing you need to change in the pantera is the engine mount and fan mount.

As far as I know they still make them. Yep helibug will jump in with it.

**KevDavies** · 25-12-2012, 03:28 PM

Ive been looking at this engine, and it fits my needs perfectly at the minute. But Ripmax being as crap as they are I bet they dont even stock it, and the price is prohibitive to me at the min.

I dont doubt it will be a good engine because its made by OS, Im just a bit averse paying for something without seeing one run first.

**trillian** · 25-12-2012, 03:52 PM

Originally posted by KevDavies View Post

Ive been looking at this engine, and it fits my needs perfectly at the minute. But Ripmax being as crap as they are I bet they dont even stock it, and the price is prohibitive to me at the min.

I dont doubt it will be a good engine because its made by OS, Im just a bit averse paying for something without seeing one run first.

I think it would be a bit sluggish in the Raptor as it's not the lightest of .90 airframes. I have an OS70 in a Robbe Futura SE which is a bit lighter than the Raptor and it feels underpowered once you're used to a .91 nitro engine. The GT15 is supposed to have a bit more power than the OS70 but still a good bit less than a .91 nitro.

But in the real world who knows, it's possible just the specs alone don't tell the whole story.

**Varelco** · 25-12-2012, 04:22 PM

There a few videos on YouTube for this engine. I started a thread a while ago on here seeing if I could find anyone using it (just out of curiosity). If you sports fly then it's ideal, cheap fuel and economical (upto an 1hour on one tank), easy to tune (so I'm told gassers are easier and require less tuning). I'm patiently waiting for it to be viable to replace a nitro then I'd have a gas heli

Announcement

Os gt15hz

Os gt15hz

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment