Best Gearbox Ratio for 582 and GSC? Kitfox III

[LSaupe 123]

I soon need to order a new C box for my 582.  I willbe running the OEM GSC prop (came with a Kitfox III) for the near term, then hope to head towards an IVO or similar down the road.

 

My engine was originally equipped with a 3.0 ratio.  Is this the best ratio for a GSC, or would it make sense to move to a 2.6X ratio?

 

Anyone run a GSC with a 2.6x ratio box on a 582?

[TJay 1041]

I dont remember if I was on ebay or Barnstormers a few days ago, but I saw a C gearbox with 3 to 1 gears used for a few hundred bucks. Not sure If your in the market for used parts or new ones.

[LSaupe 123]

Thanks, I will check it out.

[TJay 1041]

Rotax C gearbox 3-1

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[Guest]

I ran the GSC 2 blade mechanical IFA on my 582 with both 3:1 and 2.62:1 gearsets (or what ever the ratio of the 2.x is). While it worked with both, I preferred the 3:1. The prop was pretty massive and it seemed to rev slower and just didn't kile to jump off th ground as well with the 2.62. The 2.62 did pretty well in cruise though. Still I preferred the 3:1 overall with the GSC.

[LSaupe 123]

Thanks T.J. I made initial contact.

 

Thanks ChrisB.  For reference my prop is a 3 blade in case that makes any difference.

[EDMO 1078]

I have an A or B box that was used with a 532 upright and 3-blade 68" GSC -

Donno how to tell what ratio it is.

If you can use it, I would take $200 plus shipping.

Or, I may put it on ebay soon.

EDMO

Edited 1 May 2015 by Ed In Missouri

[TJay 1041]

 the gear set should be stamped on the case ED. Or you could just spin it by hand and count.

[EDMO 1078]

the gear set should be stamped on the case ED. Or you could just spin it by hand and count.

Where on the case? It is still on the engine.

EDMO

Edited 1 May 2015 by Ed In Missouri

[TJay 1041]

right under the prop hub on the aluminum case is where I have seen them

[EDMO 1078]

Thanks TJay, I will try to look tomorrow.

EDMO

[dholly 718]

Not sure if you found this thread, some good info there... http://www.avidfoxflyers.com/index.php?/topic/643-kitfox-m-iii-prop-comparisons-for-582/

[EDMO 1078]

I soon need to order a new C box for my 582.  I willbe running the OEM GSC prop (came with a Kitfox III) for the near term, then hope to head towards an IVO or similar down the road.

 

My engine was originally equipped with a 3.0 ratio.  Is this the best ratio for a GSC, or would it make sense to move to a 2.6X ratio?

 

Anyone run a GSC with a 2.6x ratio box on a 582?

Do you have to buy a complete redrive, or just the gears? I thought you said your gears were ruined? Maybe that was someone else?

EDMO

Edited 1 May 2015 by Ed In Missouri

[LSaupe 123]

Actually, I need the gears, prop-shaft, bearings and seals.  All excessive corrosion damage.  The total is more than a new box.  The outside of the box (casing) looks shiny new actually.

[LSaupe 123]

Thanks for the other box offers but I would like to stay with a C box.

[LSaupe 123]

Not sure if you found this thread, some good info there... http://www.avidfoxflyers.com/index.php?/topic/643-kitfox-m-iii-prop-comparisons-for-582/

Ah.. yes I do remember that thread from a while ago.  I did make a similar post there at the time.  I tried to contact GSC recently but no response.  May try again.

[EDMO 1078]

That's the first time I have heard about a 3.47:1 ratio.

EDMO

Edited 1 May 2015 by Ed In Missouri