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Speed,Combat,Scale,Racing => Carrier => Topic started by: Avaiojet on October 17, 2010, 05:29:24 PM

Title: Carrier set-up? Flaps and throttle?
Post by: Avaiojet on October 17, 2010, 05:29:24 PM

Ok, I found Carrier Posts. Great!

How are these models set up? With the flaps extended and the throttle back, one would think down elevator would be needed to maintain straight and level flight. Correct?

Also, once the flaps are lowered, do they stay lowered or do they change with the throttle speed?

Three lines? Three line belcrank?

Thanks in advance.

Title: Re: Carrier set-up? Flaps and throttle?
Post by: Paul Smith on October 17, 2010, 05:43:33 PM

In my opinion, flaps (and ailerons) are sort of unnecesary or even counter-productive in Carrier.

Currently, winning models go into a prop-hanging "hover" mode of "flight" were full scale aerodynamics become irrevelent.

Real airplane fly slow filight at about 22-to-25 degrees AOA and flaps help.  But modern prop-hanging Carrier planes fly at 60 degrees, so airfoils, flaps, etc, don't mean much.

Title: Re: Carrier set-up? Flaps and throttle?
Post by: john vlna on October 17, 2010, 05:51:35 PM

Most of the top fliers do not use flaps, etc. The trick to slow speed is something called a slider. The leadouts are as far forward during high speed as stability dictates. For slow speed the slider releases and the lines move back causing the plane to yaw out and allows the pilot to get into the 60 degree nose up attitude. There was a good article on all of this in Brodak's magazine several issue ago.

Throttle can be done in two ways for glow. Electrical with a servo driving the throttle linkage, or with a 3 line bellcrank. Most people use the 3 line Bellcrank. I have done both and find little difference between the two for glow engines. The electric approach requires insulated lines so I usually use the mechanical 3 line system on my glow models. My Electric models use electric speed control and insulated lines.

Title: Re: Carrier set-up? Flaps and throttle?
Post by: Avaiojet on October 17, 2010, 06:45:39 PM

Thanks for the replies and info. I should have made one point clear. My interest wasn't necessaralery carrier.

I'm cutting up an ARF Corsair. Adding flaps and some changes to the nose and tail. I would like to slow fly the model with full flaps and have control of the throttle without loosing any flaps.

I don't expect to land the model on a carrier, possibly some touch n go's, but the slow fly with all flaps lowered has to happen.

I purchased a H9 Corsair for RC. I expect to do this model up for CL. I prefer a smaller model, but I don't really know all the ARF Corsairs available. I know of the Nitro, but it has too many issues with look.

How do I accomplish my goal without using electric devices. This is my dream Corsair.

Title: Re: Carrier set-up? Flaps and throttle?
Post by: john vlna on October 17, 2010, 06:54:10 PM

You probably should post your question on the scale board. they probably would be of more help.  I have never done it but before availablity of easy electronic control systems people did what you are talking about in scale. They used multiple lines ( MORE THAN THREE), spring loaded belcranks, etc.

Title: Re: Carrier set-up? Flaps and throttle?
Post by: clscale7 on October 18, 2010, 03:15:23 PM

I would install electronic controls and control the flaps indepent of the throttle control (2 line bellcrank and lines).