New project: Electric Air-prop canard.
09-21-2007, 03:36 AM
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New project: Electric Air-prop canard.
Given that I had a lot of fun designing and building not to mention developing my Air-tri or stabilized monohull,
http://www.rcuniverse.com/forum/m_59...tm.htm#5967859
I have decided to embark on a more ambitious project.
I want to use the same motor/prop and 6-cell setup and build a canard.
Never one to truly follow convention I am toying with a few different ideas at the moment.
Firstly is the whole lifting wing thing. If I have enough or too much lift that is fine, however if I can not acheive enough initial speed to generate lift then the vee profile sponsons will not fly. Given a 550 this may not happen anyway.
I have a few ideas to overcome this.
1. Run flat bottom rear sponsons similar to a rigger, may need a turn fin though.
2. Run very shallow vee rear sponson, compromise between lift and steerage.
3. Build it with a real big lift area and trim back as required, bit hit and miss though
I plan to keep the front sponson in contact with the water in the way the Europeans do.
Steering will either be via a transom mounted rudder or for something very off the wall I may even steer it from the front with a small rudder behind the step of the front sponson.
As with all of my boats this is not a racer just a fun machine.
I now have a nice little fleet and want moreā€¦ā€¦and more speed.
So far we have. 22ā€¯ FE cat, 20ā€¯ shallow vee FE mono, 20ā€¯ F1 FE tunnel, Springer tug, My Air-tri.
http://www.rcuniverse.com/forum/m_59...tm.htm#5967859
I have decided to embark on a more ambitious project.
I want to use the same motor/prop and 6-cell setup and build a canard.
Never one to truly follow convention I am toying with a few different ideas at the moment.
Firstly is the whole lifting wing thing. If I have enough or too much lift that is fine, however if I can not acheive enough initial speed to generate lift then the vee profile sponsons will not fly. Given a 550 this may not happen anyway.
I have a few ideas to overcome this.
1. Run flat bottom rear sponsons similar to a rigger, may need a turn fin though.
2. Run very shallow vee rear sponson, compromise between lift and steerage.
3. Build it with a real big lift area and trim back as required, bit hit and miss though
I plan to keep the front sponson in contact with the water in the way the Europeans do.
Steering will either be via a transom mounted rudder or for something very off the wall I may even steer it from the front with a small rudder behind the step of the front sponson.
As with all of my boats this is not a racer just a fun machine.
I now have a nice little fleet and want moreā€¦ā€¦and more speed.
So far we have. 22ā€¯ FE cat, 20ā€¯ shallow vee FE mono, 20ā€¯ F1 FE tunnel, Springer tug, My Air-tri.
09-21-2007, 03:52 AM
#2
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RE: New project: Electric Air-prop canard.
O.k I have given this a wee bit more thought will I ducked out for a fag!
I am not so sure I will have enough power to get it to truly fly the rear end so I will go for a good compromise and run the rear sponsons wet.
That said they will only just be with any luck.
I am looking to build the rears just like I did for my failed rigger project ( that failed because it was too heavy, poor quality prop and poked motor among other things )
These had a very small dihedral set into them looking from the front with ride pads at the rear. Not shallow vee just set so that each side canted upwards very slightly.
This will allow me to run the front less wet and give me more stability.
I will run up some sketches soon.
I am not so sure I will have enough power to get it to truly fly the rear end so I will go for a good compromise and run the rear sponsons wet.
That said they will only just be with any luck.
I am looking to build the rears just like I did for my failed rigger project ( that failed because it was too heavy, poor quality prop and poked motor among other things )
These had a very small dihedral set into them looking from the front with ride pads at the rear. Not shallow vee just set so that each side canted upwards very slightly.
This will allow me to run the front less wet and give me more stability.
I will run up some sketches soon.
[8D] running a 1.48
