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- This topic has 5 replies, 3 voices, and was last updated 13 years, 1 month ago by marauderbomber.
11/27/2009 at 12:43 am #41258Steve LandyParticipant
I am thinking of trying Super D and am gathering information. One thing I would like to know is what kind of prop/RPM combo are you using? What is the range of wing areas? What kind of weight is reasonable? As you can see I have much to learn as this kind of information does not show up in the magazines nor does anybody in New England that I know of fly the beasts.02/02/2010 at 4:03 am #48179marauderbomberParticipant
I have a modified Satellite 1300 Super “D” ship that I have had for 25 years. It is powered by a stock Rossi 65 rear intake, rear exhaust on bladder pressure. It uses 3 oz. of fuel for each flight and it’s like flushing a commode. There one second and gone the next…<
It swings a 12-4 fiberglass prop on 45% Byron fuel. At max power it turns around 18,700 rpm. This model has been build 3 different time before I got the right combo that I was looking for. The finish model weighed in at 54 oz. It functions on the VIT system.
Some Satellite 1300’s that I have seen came in around the 60 -70 oz. I live by the old theory that if the models finished weight is the same or less than the cc of engine displacement then you have a competitive model. (That theory doesn’t apply to 1/2A models). I purposely went all out to build the model extremely light for the stock engine.
In my younger days I didn’t have the extra $$$ to hop-up the engine. So, I did what I had to do on a military income with a wife and child to take care of.
And you are correct when you call the Super “D” class a “Beast” But let me tell you this…….Man-O-Man is it ever exciting….and well worth the time and effort.
I hope I have answered some of your questions or concerns.02/02/2010 at 4:23 pm #48180Steve LandyParticipant
Thanks for the info! The next thing I need to find out is where I can get some fiberglass or better carbon fiber props, say 12-5. I’ve heard that there are people out there that make CF props for sale but they don’t seem to have websites. I’m making a guess that a Rossi .61 FIRE will need that much prop on 30% nitro.02/02/2010 at 5:11 pm #48181SIMON BLAKEParticipant
I am working on a Super D model too. It’s my own design, about 1150 squares, and I am using an OS FP60 for power. That’s may be a little less power than the Rossi, but I am sure it will pull pretty hard. I am going to use an APC 12×5 prop to start with. The APC props work well on my smaller ships and they are available in my local hobby shop! 😀02/02/2010 at 5:12 pm #48182SIMON BLAKEParticipant
I am working on a Super D model too. It’s my own design, about 1150 squares, and I am using an OS FP60 for power. That’s may be a little less power than the Rossi, but I am sure it will pull pretty hard. I am going to use an APC 12×5 prop to start with. The APC props work well on my smaller ships and they are available in my local hobby shop! 😀02/02/2010 at 5:20 pm #48183marauderbomberParticipant
To help answer the question on the prop dia. 12-4 is good 12-5 will work but it just lags the engine down. (PRM is thrust) Please keep in mind that all engines have a limit on how fast they can turn before they go “BOOM”…not good.
30% nitro works great as an all around fuel. It will take care of the 1/2A to “D” ships. I use to run 60% nitro but the cost just got out of hand. Plus, I have found that the 45% nitro does a great job and gives the engine a little bit more longevity for fun.
Fiberglass props are out there but they are kind of a specialty. I purchased my glass prop from a F1C modeler who lives in CA and this was years ago.
He made his own mold and produced a limited number of props in different sizes. He sold them to help offset the cost of traveling to contests. I have never had one of his props fail.
Your Rossie 61 will be a great engine for your model. They are built very robust with a ton of brute power.
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