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Engine basics => Engine set up tips => Topic started by: Ron Merrill on March 26, 2011, 11:15:39 AM
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Those of you who have used it, what do you think. I use Powermaster, but my son asked me about Brodaks because it is more available to him in Maryland. y1 Ron
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I have used Brodak's fuel for six or seven years now without any problems. I use both 10% and 5% nitro with an 11-11 oil mix. I'm not certain but I think Cooper manufactures the fuel for Brodak. Perhaps that's changed? I've used Powermaster fuel also and have noticed no difference in performance with the same nitro and oil mixes with both fuels.
Joe
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Our club members have had this disucussion on several occasions. The best way to tell is back to back performance. If the needle has to be dialed in more when using one fuel I would think the proof is right there. It would be pretty obvious as to which is making more power assuming your choosing the equal proportioned nitro/oil contents. Ken
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I've done extensive comparisons to with Brodak 10/23 and Powermaster 10/22.
I've run them in Fox 35s, both stunt runs and screaming lean.
Also in a 1950 Atwood Triumph.
And, in many 4-strokes, from the OS 20 up to the SAITO 62.
I could never find any difference in performance.
Bob Z.
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I've done extensive comparisons to with Brodak 10/23 and Powermaster 10/22.
I've run them in Fox 35s, both stunt runs and screaming lean.
Also in a 1950 Atwood Triumph.
And, in many 4-strokes, from the OS 20 up to the SAITO 62.
I could never find any difference in performance.
Bob Z.
Bob, there might not be any difference in performance but I do know that I can use can after can of powermaster and usually never touch the needle valve. But you can bet that it will have to be adjusted from bottle to bottle using Brodaks fuel. Yes I know who makes Brodaks fuel. That is not in itself a bad thing but you did say a difference.
Dennis
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Not true. I do quite a bit of flying and now use the Brodak fuel exclusively.
I find no batch-to-batch variation.
I adjust the needle valve no more often than I did with the Powermaster.
My only problem with the Brodak fuel is the container - I prefer a metal can.
Bob Z.
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Bob,
Are you inferring that I'm somehow fibbing in my post. we have both made a statement. I don't think world peace is at risk.
I'll give you one of my empty powermaster cans for your fuel. We won't tell anyone. LOL
Dennis
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Our club members have had this disucussion on several occasions. The best way to tell is back to back performance. If the needle has to be dialed in more when using one fuel I would think the proof is right there.
Oh, that's not necessarily the case. If the viscosity is different, that would also change the needle position without necessarily affecting the power. I think the difference between 10% Powermaster "GMA" and Powermaster "RO-Jett" is about a full turn in on the needle but the RO-Jett fuel has more power and runs about the same time. That's because RO-Jett has much lower viscosity.
Brett
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The only problem I have had with Brodak fuel is the lids pop off with no warning. I rerack the fuel into old Power Master cans as soon as I get it home.
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The amount ...and type.. of Nitro will make for a new needle setting
The amount... and type... of oil will make for a new needle setting
Fuel mixed by weight ,vs volume will have a different needle setting
they are other things that change the needle setting also
Randy
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Has anybody found RoJett blend Powermaster for sale since the buyout of Powermaster?