Thunder Tiger UH-1Y

[muscleflex]

I'm picking up my first scale heli this coming Saturday. It's a Thunder Tiger UH-1Y.
I can't wait! I've always wanted this heli since I saw one at my friend's house but he wouldn't offer to sell it to me..

Anyway, this one I'm picking up is flybarless and powered by an OS 50 Hyper. I only fly electrics so I don't know much about engines. Owner said he flies it on Optifuel 20.

Should I carry on and use Optifuel 20 or is there a better fuel for this?

I'll post more photos when I get it this weekend!

[_tj_]

If the owner flies it fine on 20% and hasn't had any issues why change it, is the way I see it.

I guess if you change the fuel % then the needles would need altering also for the different mixture.

[Boggy]

I'm green with envy. Great looking model.

[muscleflex]

Thanks! I just wanted to make sure as optifuel 20 sounds like a high number for scale flying. You're right about changing needle settings if I disturb anything on the model or fuel so I'll stick to the same fuel then! I don't even know how hard it is to work on the inside of this thing.

I'll post more photos when I get it!

If the owner flies it fine on 20% and hasn't had any issues why change it, is the way I see it.

I guess if you change the fuel % then the needles would need altering also for the different mixture.

[muscleflex]

I'm green with envy. Great looking model.

I think I got lucky! I've always fancied one but I don't see them around anymore!

[trillian]

You might be able to save a little money on fuel running lower nitro but I don't know how much as it has been a while since I bought any fuel. It would depend on how much you fly it as to whether you'd save enough to really matter. With higher nitro you have more fuel / air ratio so the engine can, in theory, run a bit cooler. Starting and tuning is sometimes easier with higher nitro as well. I used to run everything on 15% Rapicon but I don't think you can get it anymore.

[trex flyer]

Convert it to electric !
Sound more turbine like and cleaner ��

[muscleflex]

Convert it to electric !
Sound more turbine like and cleaner ��

Hah! I wouldn't know where to start but that would be really cool if I could!

[muscleflex]

You might be able to save a little money on fuel running lower nitro but I don't know how much as it has been a while since I bought any fuel. It would depend on how much you fly it as to whether you'd save enough to really matter. With higher nitro you have more fuel / air ratio so the engine can, in theory, run a bit cooler. Starting and tuning is sometimes easier with higher nitro as well. I used to run everything on 15% Rapicon but I don't think you can get it anymore.

The heli is currently on a Futaba so I'll have to re-set it up for my Spektrum. I'm currently just reading up on scale nitro throttle and pitch curves.

Do nitro scale use flat throttle curves like we do on 3D or it's a standard 25/50/75/100 throttle curve?

[trillian]

The heli is currently on a Futaba so I'll have to re-set it up for my Spektrum. I'm currently just reading up on scale nitro throttle and pitch curves.

Do nitro scale use flat throttle curves like we do on 3D or it's a standard 25/50/75/100 throttle curve?

If you're going to fly in a scale-like manner than you can get by without running a governor and then you'd just use throttle curves that go from 0 to 100 like that. Where you might want to fine-tune the throttle and pitch is right around the point for hovering, because you'll probably want a really smooth response rather than a twitchy response for doing precise hovering and looking more scale.

Soooo, the curves might look a little flatter in the middle, or at 3/4 ish, wherever it hovers. I used to do this for working on F3C style hovering, keeping the pitch and throttle at a milder slope right at the hover point. But otherwise it should be quite simple and fairly linear.

[muscleflex]

Is it still possible (and practical?) to convert mine from nitro to electric and retain the clutch for super realistic start like on this video?
https://www.youtube.com/watch?v=DQJw...t=43.744150566

[Boggy]

Quick uk used to do a conversion kit.

*edit.

http://www.quickuk.eu/products/4711/...kit_rd-12.html

[muscleflex]

Quick uk used to do a conversion kit.

*edit.

Quick UK Retail - shop-products

Thanks. I didn't see that one you linked but I did see their £150 package with the motor... but I don't think it uses the clutch so it won't give me the nice looking super slow spool up.. it's nice to know the conversion is still in stock tho. I might look into converting altho I fancy seeing smoke in my heli... but it depends how messy it gets after each flight!

[trex flyer]

My electric converted Hirobo Lama uses a Castle creations Talon 90esc, I couldn't retain the clutch but the spool up time is adjustable.
From rest to flying speed the spool up time is 32 seconds, what I don't get with this setup is the super soft start of the rotors like you would with a clutch.

[trillian]

My electric converted Hirobo Lama uses a Castle creations Talon 90esc, I couldn't retain the clutch but the spool up time is adjustable.
From rest to flying speed the spool up time is 32 seconds, what I don't get with this setup is the super soft start of the rotors like you would with a clutch.

There are some threads on Runryder with conversions using the clutch. They are generally done quite similar to the Quick UK one but just not as nice, with a two piece motor mount that basically clamps itself into the frames and then a prop adaptor on the motor to attach the clutch.

But if I was converting one I wouldn't want the clutch because to me it's just not such a big deal to have a super slow start, you only do the spool-up once and then the rest of the time you're flying around. To my way of thinking you'd only want that if you were entering scale comps or something.