Which engine and muffler? Raptor G4

[LaurenceGough]

You guys are right, better to future proof yourself a little with the bigger engines. Looking at videos of the 90 size engines they do bog a bit more.

As much as I'd prefer a YS engine I am thinking the O.S MAX 105HZ-R run on 15% nitro will be ideal for me. It seems every bit as powerful as the YS 120SR.

Mind you I haven't seen the 105HZ-R running 710mm main blades, I don't know if this will make a big difference? With 697mm main blades it was insanely powerful.

Also it should last longer on a tank of fuel than a 120.

Thanks James, I would have thought the regulated one would have been better after OS has worked on so many, hmmmm.

[jamiem]

I would without a doubt go for an OS105 over a YS120. I was/am a loyal YS follower having always used their 90 size engines, BUT the 120 seems to be very hit and miss where as every report I've heard on the OS is good and consistent. I'm sure you won't be disappointed

[leckylee]

I would go for the 105 I have not got one yet but all the os engines i have had have been great, I had the YS120 and it was bad (my one anyway)

[shades]

Well I have finally finished by G4 build. Hoping that the weather is good tomorrow and should get the maiden and engine run.
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[LaurenceGough]

Very nice Shades! I think I'd have to fly it no matter the weather! (ok maybe not in crazy rain)

I did have a look at that engine but I couldn't find much on it I'd rather play it safe for my first nitro heli.

[Gate88]

Most people I know that brough the early 120's have got rid of them now in favour of slightly smaller engines, one of the problems is the additional torque being forced through an airframe only designed to take a 90 or 91 size engine, they just seemed to forever be stripping gears, snapping TT's and stuff like that. The other big problem was the mufflers, they just kept failing in flight, baffles coming free inside and wealds breaking loose on the casing.

If you want power then the 105 looks a good bet, but to be honest looking at Petes set up last week and how he was able to hammer his G4 I'd say go with what he's using!

[LaurenceGough]

Good thing with the Raptor is it's built for electric too so it should be able to handle the torque, either way the 120 is just plain nuts, I've never been a big fan of outrageous electric set-ups, and the 120 is that of the nitro world.

Yeah I know Pete's 91 was rocking pretty damn well, but I reckon the 105 will have a bit more power and I can run 20% on it .

[Steve]

I'd think carefully about your choice of fbl unit if I was in your shoes. I know you're a die-hard vBar fan, but the unit was always designed from the ground up as a lecky unit and isn't really suited to the vibes associated with nitros. I'm sure many people will knock me down and say how good it is on a nitro, but it's just me gut feeling. I'd think about a fbl unit that has more suitable anti-vibration equipment and has nitros at its core like the Futaba one. Just my 2p.

[KnifeEdge]

I have the OS 105 and using vbar Silverline. Sweet Heli.

[electricsceadu]

Most people I know that brough the early 120's have got rid of them now in favour of slightly smaller engines, one of the problems is the additional torque being forced through an airframe only designed to take a 90 or 91 size engine, they just seemed to forever be stripping gears, snapping TT's and stuff like that. The other big problem was the mufflers, they just kept failing in flight, baffles coming free inside and wealds breaking loose on the casing.

If you want power then the 105 looks a good bet, but to be honest looking at Petes set up last week and how he was able to hammer his G4 I'd say go with what he's using!

i will say mosst of the airframes were designed for the 60 class motor
yes the later airframe will have a 90 in mind
didn't thunder tiger reduce the size of the big red line as the old rappy 90's clutch couldn't take the torque?

[Andy from Sandy]

I'd think carefully about your choice of fbl unit if I was in your shoes. I know you're a die-hard vBar fan, but the unit was always designed from the ground up as a lecky unit and isn't really suited to the vibes associated with nitros. I'm sure many people will knock me down and say how good it is on a nitro, but it's just me gut feeling. I'd think about a fbl unit that has more suitable anti-vibration equipment and has nitros at its core like the Futaba one. Just my 2p.

This was the case until the new silverline came out. The sensor in that is the same as you are using in the Futaba unit.

[LaurenceGough]

Yep, I'm going to purchase the new silverline - part of the reason I'm going for a nitro as you're right they never liked nitros much until now. Thanks .

[gorber]

Most people I know that brough the early 120's have got rid of them now in favour of slightly smaller engines, one of the problems is the additional torque being forced through an airframe only designed to take a 90 or 91 size engine, they just seemed to forever be stripping gears, snapping TT's and stuff like that. The other big problem was the mufflers, they just kept failing in flight, baffles coming free inside and wealds breaking loose on the casing.

If you want power then the 105 looks a good bet, but to be honest looking at Petes set up last week and how he was able to hammer his G4 I'd say go with what he's using!

Thinking about the ones you have probably seen, are most of those in Velocity 90's Guy? If they are, they aren't know for strong gears anyway. The mufflers are a different matter though.

Personally I am happy with 91 size for my flying, not being a 3d guru, it is plenty of power.

[p4ddy]

Purchase this Vbar update purchase that update, now purchase a more suited sensor That's the beauty of flybars.....1 gyro does ALL heli's without further upgrades apart from maybe a new pad. Ooops the anti fbl warrior attacks another thread .


Hey them longer flight times will also be accompanied by an oily boom & blades & possibly another nitro stain on your dining room table

Here's a little reality check for you mate

'Nitro vs Electric'.........

[swale]

to be fair I find my 91 hz 3d on 30 has plenty of power....noen the less Id love to try the 105 in my velocity especialy since I have cnc gears.....just cant justify £500 notes in a nitro engine now...had sucjh a good deal with my setup I couldnt justify an alternative.....

The 120....to be honest think there a horrible engine...fussy, vibrate alot, exhaust troubles,price,run costs and the fact that its very hard to get max power with it running nicely across the board....not for me, having said that there seems to be some happy people....I loved my YS56 great 50 class engine and the 91 is well liked by most (never tried one) the YS120 I'd steer clear.....

O.S 105hz would be my engine of choice or the 91hz 3d should guy(gate88 or snotvis (mike) offer me £350 for my O.S 91 3D then Ill post a review on the 105hz.....:-D