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Cox Engine of The Month
May-2024
1/2A Nut's

"Cox Tee Dee .051 RC Marine"



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Post  Ken Cook Sun Apr 19, 2015 9:56 am

I was able to get to the field and get some flying in yesterday. I brought Big Otto with me and got two flights on it. I made a big mistake in assuming a few things. I banked on the assumption that due to using a TD and having it project slightly out further than a bee was going to make this plane nose heavy. I did make some minor changes in construction and I feel this proved to be the deal breaker for my thinking. The plane came out nose heavy. I guess this is the price you pay when you don't fully assemble and mock things up and take a guess. All this aside the plane flew real well and I have some easy solutions to providing tail weight without having chunks of lead stuck to the model. I despise that. I will be making new elevator from basswood and just a tad bit wider. This plane however will be very maneuverable once I resolve these issues. It's always nice to have a new model to fly. Here it is with my combat TD running on 10% Powermaster . The speeds appear slow but from pilot to center of plane is 45'. https://www.facebook.com/PhillyFliersCL/videos/vb.513140418756097/845562595513876/?type=2&theater I have to give a big thanks to Mike Parkin for providing the aluminum carb body not to mention making the APC prop adapters that I designed. These work terrific on the APC props. Ken
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Post  JPvelo Sun Apr 19, 2015 10:28 am

Ken,
That tee Dee seems to really like the 10% powermaster. I recall reading where you have run powermaster in cox engines before. Do you get any negative effects as far as premature wear? I think this may be the solution for the fuel proofing issues we've discussed .

Jim
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Post  Ken Cook Sun Apr 19, 2015 11:16 am

Jim, despite the rumors that run rampant throughout the net, I've been using Poiwermaster GMA blend 5% or 10% nitro - 11/22 oil in every single engine I own including vintage engines. I never ever had a failure or premature wear or all the bs that everyone will tell you if you run synthetic fuels. I run it in Mccoy's, vintage O&R's you name it. It's all I use bar none. In the past 15 years I've been running it, and I run a lot of stuff I never heard or seen a failure that was due to using this fuel. I like many was very skeptical at first. My Fox .35's run it for racing as well. I very rarely use all castor fuels. I use it only for a select few. Ken
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Post  JPvelo Wed May 06, 2015 7:00 pm

Had the chance to fly today for the first time in about a month. I ran a tee Dee on powermaster 10/20. Started easy and ran great. I'll keep trying it out.

Jim
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Post  getback Thu May 07, 2015 7:09 am

They sell racing fuel down at the store below my house for some of the drag strip tuners around here , Its this stuff http://powermasterfuels.com/index.php?option=com_content&view=article&id=6&Itemid=8 they don't have the airplane fuel but bet they can get it Huh... If can get in touch with the rep. maybe cut out the middle man Laughing
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