engine Suggestions needed
06-02-2003, 03:05 PM
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engine Suggestions needed
Im building a Lockheed Altair which is a low wing single engine plane. This will be a 1/4 scale model and have a wingspan of 127" approx weight of 35 lbs This will be scale so I am hoping to put a twin, or radial four stroke in it or a twin gasser.
Thnks for the help,
Matt
Thnks for the help,
Matt
06-03-2003, 10:15 AM
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engine Suggestions needed
Matt,
Do you have any idea how your balance is going to come out? I ask because it can have an influence on the engine choice. If the nose of the Altair is not long, and your airframe may tend toward being tail heavy, I would consider the Zenoah 445. Not the lightest in that size class, but a good match. Magneto ignition adds to the weight, but takes the headache of ignition batteries out of the equation. If you are going to add nose weight anyway, no penalty. OTOH, if your finished plane is tending toward being nose heavy, there are a number of good engines, 3W amoung them, that will have plenty of power and minimum wieght for a two banger.
Good luck!
Bedford
Do you have any idea how your balance is going to come out? I ask because it can have an influence on the engine choice. If the nose of the Altair is not long, and your airframe may tend toward being tail heavy, I would consider the Zenoah 445. Not the lightest in that size class, but a good match. Magneto ignition adds to the weight, but takes the headache of ignition batteries out of the equation. If you are going to add nose weight anyway, no penalty. OTOH, if your finished plane is tending toward being nose heavy, there are a number of good engines, 3W amoung them, that will have plenty of power and minimum wieght for a two banger.
Good luck!
Bedford
06-03-2003, 10:23 AM
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engine Suggestions needed
Any of the 100cc engines would be massive overkill for this plane. You could fly it with as little as a G-62, MacMinarelli 85cc, GT-80Zenoah, or ZDZ80 single or twin on regular mufflers.
Personally, I'd go for the 100cc twins, then throttle back. BME, DA, or even a used Brison 6.4 are all good choices.
Personally, I'd go for the 100cc twins, then throttle back. BME, DA, or even a used Brison 6.4 are all good choices.
06-03-2003, 10:48 AM
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engine Suggestions needed
It looks like the initial guess was wrong and were now looking at approx. 40-45lbs for the plane. Im including a link to a pic of the plane im doing. She's gona have a 127" wingspan, body approx 86 3/4" I was thinking of putting a Saito 450R in her, would this be appropriate? I want that scale sound that a 3 cylinder is gona give verse say a one or two. Or am I wasting my money?
Unfortunatly untill i have the plans in front of me Im not gonna be able to tell you if she'll be nose or tail heavy.
http://www.adastron.com/lockheed/altair/h36vhusb.htm
Thnks
Matt
Unfortunatly untill i have the plans in front of me Im not gonna be able to tell you if she'll be nose or tail heavy.
http://www.adastron.com/lockheed/altair/h36vhusb.htm
Thnks
Matt
06-03-2003, 11:26 AM
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engine Suggestions needed
A WELLl-mufled 100cc motor will give you a nice sounding powerplant, and more than enough power to fly that airplane very "scale. If in doubt use a 3W120.
The 450 will NOT be enough power.
The 450 will NOT be enough power.
