Consumption rate for SJ 50?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> Consumption rate for SJ 50?
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Consumption rate for SJ 50? - 6/21/2007 9:15:23 PM   
roym2


 

Posts: 8
Joined: 6/18/2003
From: Peabody, MA, USA
Status: offline 		Hi has anyone have a good base line for fuel consumption (oz per min) on a SJ 50 with the black tuned muffler. Trying to size a fuel tank for my q500.

thanks,

Roy Medina
       Post #: 1

RE: Consumption rate for SJ 50? - 6/21/2007 9:37:00 PM   
bob27s



Posts: 4637
Joined: 4/9/2002
From: Cleveland, OH, USA
Status: offline
quote:

ORIGINAL: roym2

Hi has anyone have a good base line for fuel consumption (oz per min) on a SJ 50 with the black tuned muffler. Trying to size a fuel tank for my q500.

thanks,

Roy Medina


Hi Roy.....

The SJ50 with the black racing muffler runs almost the same as the 428 engine - fuel wise, and pretty much power wise.

The 428 Q-500 engine burns through 6 oz of fuel in about 3 minutes (at full throttle).

The SJ-50 with the black muffler, and suitable prop (8.75x8W or 8.8x8.5 would be a good choice) should be about the same, maybe just a bit less fuel. You will get some benefit since you can throttle back when starting, and you can throttle back now and then in the air too.

For most Q-500 applications using the high-output/high-rpm configuration of any of the engines, we recommend using a bubble-free fuel system. Either a 6oz bubble-jett fuel tank or 6oz tetra bubble tank is the way to go. Eliminates the risk of fuel foam, plus you get a consistant engine run right down the the very last drop in the fuel tank.

A conventinal fuel tank only holds appx 75-80% useable fuel. Below that you run the risk of sucking an air bubble or a lean run. So a regular 6oz tank gives you appx 4oz of flying fuel.

Most Q-500 designs can only accomodate a 6oz fuel tank.

I hope this is helpful.

Bob


_____________________________

Bob Brassell
Jett Engineering - Engine Mfg Support Forum Host

(in reply to roym2)
       Post #: 2

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Manufacturers Direct Support Forum >> Jett Engineering Support >> Consumption rate for SJ 50?
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