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Old May 30, 2012, 08:17 AM
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Australia, NSW, Baulkham Hills
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Thunder Tiger Easy Trainer 40 conversion

Hi guys,

I'm in the process of researching what i will need to do for conversion of a Thunder Tiger Easy Trainer 40 to electric.

A big thanks to Scirocco who has already provided me with some valuable info via PM.

Thought I'd post some questions for the other experts though............

Regarding prop clearance.

I'd like to run a 12" prop with a Turnigy G46 670kv on 4S.

Measuring the existing clearance from the installed nitro engine, I have 18cm from centre shaft to ground.
If I fit a 12" prop, I will only have cearance of around 3cm (just over an inch.)

Is it possible to mount the electric motor higher up, so say the shaft is 1/2" above the position of the current shaft of the installed nitro engine? (Hope you follow) That way, I will have 1 1/2" clearance which I'm reading should be ok. (The runways at my flying fields are pretty good in terms of smoothness and level.)

Will this create any handling issues? I note the shaft of the nitro motor on the stock mount is slighty upwards from centre of the side of the fuse.

Appreciate your input.

Cheers,

Steve
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Old May 30, 2012, 11:57 AM
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Kimber's Avatar
USA
Joined Mar 2005
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It is similar to our Tower 40 trainer, but appears to be a couple pounds heavier.

We have a .32 size, 800kv on 4 cells. The plane is just under five pounds. With
an 11/6 we pull just over 500W and just over 10krpm. It flies with authority with
flights in the 12 minute range. The battery is a 5000mah BTW.

We did use one size lager wheels and adjusted the nose gear to the highest setting
we could.



We use a pod for the battery to minimize cutting on the air frame.
Battery change is quick and connecting it in from the back of the
wing so you are never in the area of the prop.

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Old May 30, 2012, 06:46 PM
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Australia, NSW, Baulkham Hills
Joined May 2004
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Thanks Kimber.

I can probably get a little more height by adjusting the nose wheel a bit, but that would mean the front will be slightly higher than the rear.

With a tri landing gear setup, is this likely to be an issue? I'm thinking not seeing as some use a tail dragger config but would appreciate further advice.

Cheers,

Steve
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Old May 30, 2012, 08:08 PM
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Brad re-bent the main gear to make it sit level.
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Old May 30, 2012, 09:27 PM
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Australia, ACT, Kambah
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Hi Steve,

with 3cm clearance on the 12" prop, I'd definitely stick with the original thrust line.

I'd still try it with the 12" prop before mucking around too much with the gear - a trike isn't going to have the noseover risk that a taildragger has. You can still keep the 1/2" or so you could get with a bigger nosewheel as a future option jic.
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Old May 30, 2012, 11:59 PM
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Australia, NSW, Baulkham Hills
Joined May 2004
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Thanks Al,

I'l give the 12x8 prop a go first then.

I'm just about to order what I need for the conversion but note that Hobbyking have the Turnigy Plus 60A ESC's on backorder.

Can anyone recommend a good budget priced alternative that will do the job?
(I will be getting the G46 670kw Turnigy motor.)

Cheers,

Steve
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Old May 31, 2012, 05:42 AM
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Australia, ACT, Kambah
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Quote:
Originally Posted by stevo1957 View Post
Thanks Al,

I'l give the 12x8 prop a go first then.

I'm just about to order what I need for the conversion but note that Hobbyking have the Turnigy Plus 60A ESC's on backorder.

Can anyone recommend a good budget priced alternative that will do the job?
(I will be getting the G46 670kw Turnigy motor.)

Cheers,

Steve
I really rate the Plush ESCs, especially the 40 and 60 that will handle 6S. Maybe you can split your order so you can get the motor installed while you wait for the Plush to come back into stock.
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Old May 31, 2012, 06:08 AM
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Australia, NSW, Baulkham Hills
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Quote:
Originally Posted by scirocco View Post
I really rate the Plush ESCs, especially the 40 and 60 that will handle 6S. Maybe you can split your order so you can get the motor installed while you wait for the Plush to come back into stock.
I tend to agree Al. The Plush ESC line get good reviews.

I'm in no screaming hurry to get the ocnversion done, so might just order everything and take my chances. They are a popular item at HK so hopefully will be restocked regularly.

Cheers,

Steve
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Old Jun 01, 2012, 06:24 PM
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.

Kimber is the plane in the photo the one with a 60 in wingspan.
And if so what esc did you use?
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Old Jun 01, 2012, 08:46 PM
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USA
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Quote:
Originally Posted by scottie52 View Post
Kimber is the plane in the photo the one with a 60 in wingspan.
And if so what esc did you use?
62", Great Planes Silver Series 45A.

Full throttle is 31A.
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Old Jun 02, 2012, 10:04 AM
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Australia, NSW, Baulkham Hills
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Hi guys,

Regarding props........I note there are Master Airscrew Electric only props (MA1208NE) or APC 12x8 Thin Electric props.

I ordered a MA one from HK but these are on back order. Given it is now the only item in my order out of stock, I am thinking of getting them to remove it from the order, so the other items can be shipped.

If I do edit the order, I'll need to source another prop and was just wondering what the difference between the 2 brands is.

Alternatively, if anyone in Oz has one they'd like to sell, please let me know.

Cheers,

Steve
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Old Jun 02, 2012, 11:30 AM
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Correction, we have a 12/6 on our plane.
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Old Jun 02, 2012, 06:37 PM
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Australia, ACT, Kambah
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Quote:
Originally Posted by stevo1957 View Post
Hi guys,

Regarding props........I note there are Master Airscrew Electric only props (MA1208NE) or APC 12x8 Thin Electric props.

I ordered a MA one from HK but these are on back order. Given it is now the only item in my order out of stock, I am thinking of getting them to remove it from the order, so the other items can be shipped.

If I do edit the order, I'll need to source another prop and was just wondering what the difference between the 2 brands is.

Alternatively, if anyone in Oz has one they'd like to sell, please let me know.

Cheers,

Steve
In my observation of electric models, MA vs APC E is about 1 in 10. I haven't used MA, but I know the APC works well. If it were my order, especially holding it up, I'd remove it and pick up an APC locally.
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Old Jun 03, 2012, 05:04 AM
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http://www.hobbypartz.com/60p-dye-1015-60a-esc.html
this esc from hobbypartz is the same as the plush and uses the same program card to, i use three of them.
larger wheels will give you more clearenc if you dont have 3" wheels now.
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Old Jun 03, 2012, 08:14 AM
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Australia, NSW, Baulkham Hills
Joined May 2004
446 Posts
Thanks for the info Scott.

The Turnigy Plush is actually backin stock and on its way to me.

Thanks for the link though - I haven't seen that online shop before. They sell at reasonable prices by the look of things.

Cheers.

Steve
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