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Old Jan 15, 2013, 06:15 PM
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shamrock1990's Avatar
Aurora, Co
Joined Jan 2004
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Hangar 9 60 corsair engine question...

Hello I am finally building my hangar 9 60 size corsair arf. I want to put a 4 stroke into it and my question is about engine weight. I know the Saito 100 is highly recommended due to its light weight and power output, however I was looking at the thunder tiger fs 91 as a less expensive alternative. The biggest difference is the weight- saito 19.2 oz minus muffler. Thunder tiger-26.20 oz without muffler. Im sure the Saito is much better in other areas as well from what ive read. Money is an issue, so what kind of performance do you think I can expect from the 91? Any and all opinions and suggestions would be great!!

Thanks

Brendan
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Old Jan 15, 2013, 07:04 PM
Registered User
United States, TX, Leander
Joined Sep 2003
2,804 Posts
How do you like to fly? I run OS.91fs and saito .91 in my .60 sized H9 warbirds. (Hellcat, P-40, P-51) They are no barn burners but they fly pretty good with that power. Loops can be done from the straight and level. I have no experience with TT but I think you'll be fine with the TT.91 4-stroke. But if you like zoomin high speed passes over the runway, that saito 100 would be my choice.
Edwin
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Old Jan 15, 2013, 07:16 PM
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jeffie8696's Avatar
United States, IA, Muscatine
Joined Oct 2009
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Here is my Funtana 90 with a Thunder Tiger 91FS. I am using a 16X4 prop so the speed is kept low.
My favorite Funtana movie (2 min 49 sec)
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Old Jan 15, 2013, 07:33 PM
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shamrock1990's Avatar
Aurora, Co
Joined Jan 2004
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Engine sounds good!

That should sound good in the Corsair I would think. So you like the power with that engine??
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Old Jan 15, 2013, 07:34 PM
Fly A Mile High
shamrock1990's Avatar
Aurora, Co
Joined Jan 2004
100 Posts
My first larger non electric warbird, so Im not real sure how I would like to fly it yet!! I am thinking the tt 91 should be just fine. plus $100 cheaper too!!
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Old Jan 15, 2013, 07:49 PM
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United States, IA, Muscatine
Joined Oct 2009
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My plane is not at a loss for power and look how easy it starts.
Thunder Tiger 91FS easy startup purrs like a kitten roars like a lion (0 min 13 sec)
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Old Jan 15, 2013, 10:00 PM
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USA, TX, Grapevine
Joined Dec 2008
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One thing to think about is that the Saito does weigh less than the Thunder Tiger engine. But you may need the weight to get the plane's CG to come out right. Normally with a radial engine plane, the nose is more short. Thus you wind up adding lead weight to the front of the plane to get it to balance. So with a heavier engine you need to add less weight to the nose to balance the plane. Anyway the Thunder Tiger engine is pretty good, so you shouldn't have any problems with it.
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Old Jan 15, 2013, 10:46 PM
TigreJohn
United States, CA, Corona
Joined Aug 2008
1,005 Posts
Might want to look at a Magnum XL91FS as an alternative. Its weight is quite a bit lighter than the TT (22.4 oz with muffler). And less expensive.
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Old Jan 16, 2013, 06:07 AM
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Kansas City
Joined Apr 2010
652 Posts
DLE 20 and a MA 16x8x3 prop. Great power and balanced perfectly.
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Old Jan 16, 2013, 11:45 AM
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Disarray's Avatar
United States, GA, Gray
Joined Apr 2007
886 Posts
I have the 100 on my H9 corsair. It has plenty of power and did not require any additional weight to balance. I have two 2000 mah NiMH batteries mounted just aft of the cockpit. The .91 should have plenty of power but I don't know about the balance.
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