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Cox Engine of The Month
Another Tuesday evening CL session
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Another Tuesday evening CL session
Another good evening tonight. Had a chance to fly the rebalanced Ringmaster. I didn't come away totally unscathed, but I had a good time. I was receiving pointers feom a feller that was in the center with me. As he walked away the engine cut out and to avoid hitting him with the lines I flared it and stalled the plane. Luckily It hit the grass and I only walked away with a couple busted landing gear straps. Easy fix.
I flew with a gentleman that was 83yrs young and he had brought along a Smoothie. He flew the wings off of it and made me realize that there is hope for me yet. Of course he has been flying since 1947. He holds his handle differently so that down is up and up is down as apparently the used to fly clockwise way back when.
Here is a pic of the Smoothie.
Ron
![Another Tuesday evening CL session 087Ej2K](https://i.imgur.com/087Ej2K.jpg)
I flew with a gentleman that was 83yrs young and he had brought along a Smoothie. He flew the wings off of it and made me realize that there is hope for me yet. Of course he has been flying since 1947. He holds his handle differently so that down is up and up is down as apparently the used to fly clockwise way back when.
Here is a pic of the Smoothie.
Ron
![Another Tuesday evening CL session 087Ej2K](https://i.imgur.com/087Ej2K.jpg)
Cribbs74- Moderator
Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Another Tuesday evening CL session
Thats a low AMA number!
Jason_WI- Top Poster
Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI
Re: Another Tuesday evening CL session
TOO COOL !!!! Man ! That looks like fun !
Kim- Top Poster
Posts : 8531
Join date : 2011-09-06
Location : South East Missouri
Re: Another Tuesday evening CL session
Was it nose heavy when you maidened it? My SS is, about 3/4" forward of the recommended. How much did you have to move the CG and how differently did it fly?cribbs74 wrote:...Had a chance to fly the rebalanced Ringmaster....
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: Another Tuesday evening CL session
RknRusty wrote:Was it nose heavy when you maidened it? My SS is, about 3/4" forward of the recommended. How much did you have to move the CG and how differently did it fly?cribbs74 wrote:...Had a chance to fly the rebalanced Ringmaster....
Yes it was nose heavy for the maiden. I had to add 1/2oz to the tail to get the CG correct. Or at least to what is recommended. What I did notice was that it flew better, but I was now able to stall it with the elevator. Not sure if one had anything to do with the other. Before I added the weight I could give full up and the plane would follow through albeit very slowly. Now when I give it full up I lose responsiveness and speed. I found if I flew it through the loops it did fine. The Ringmaster is known for stalling with that elevator acting as an air brake.
Ron
Cribbs74- Moderator
Posts : 11895
Join date : 2011-10-24
Age : 50
Location : Tuttle, OK
Re: Another Tuesday evening CL session
Ron:
Sounds like too much elevator deviation to me if it stalls.
Suggest no more than 45 degrees. This may be changed either at the belcrank or the elevator horn or a combination of both.
Experiment until you aren't stalling anymore.
SD
Sounds like too much elevator deviation to me if it stalls.
Suggest no more than 45 degrees. This may be changed either at the belcrank or the elevator horn or a combination of both.
Experiment until you aren't stalling anymore.
SD
SuperDave- Rest In Peace
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Join date : 2011-08-13
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Re: Another Tuesday evening CL session
Kim wrote:TOO COOL !!!! Man ! That looks like fun !
It was Kim, it was!
Cribbs74- Moderator
Posts : 11895
Join date : 2011-10-24
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Re: Another Tuesday evening CL session
SuperDave wrote:Ron:
Sounds like too much elevator deviation to me if it stalls.
Suggest no more than 45 degrees. This may be changed either at the belcrank or the elevator horn or a combination of both.
Experiment until you aren't stalling anymore.
SD
Thanks Dave,
I did use the innermost hole on the Bellcrank and I am running on the middle hole on the horn. I think 30 degrees is what is recommended for the Ringmaster. I will be experimenting for sure.
Ron
Cribbs74- Moderator
Posts : 11895
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Re: Another Tuesday evening CL session
If I'm not mistaken, most people use the innermost hole of the bellcrank for a separate flap linkage. I wish I had a good way to measure the elevator throw, but I've always thought 35 should be the absolute maximum. My Satan might have more but none of the others do. The Streaks are less than 30 I think, and probably the SS. I'm going to try and check it. I have a piece of soft aluminum I might be able to hold up to it and bend, then read on a protractor.
I need a full ounce on the tail to hit the plan's CG and I'm hesitant to do that since it did snap loops(what I call jerking full up loops) with no problem. It seemed happy where it was. I know pattern tuning is different from freestyle wildness tuning, but it probably should snap out of wingovers pretty quick as you approach 6 feet. But then I can conceive of tail weight improving that since it's already nose down... gravity and all. So much to learn about making them perform. So much is pilot preference too.
I need a full ounce on the tail to hit the plan's CG and I'm hesitant to do that since it did snap loops(what I call jerking full up loops) with no problem. It seemed happy where it was. I know pattern tuning is different from freestyle wildness tuning, but it probably should snap out of wingovers pretty quick as you approach 6 feet. But then I can conceive of tail weight improving that since it's already nose down... gravity and all. So much to learn about making them perform. So much is pilot preference too.
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: Another Tuesday evening CL session
What I would like to know is how you make up and down deflection even when setting things up initially.....
It never fails when I build these these things that I have more deflection one way than another! No matter how straight I keep things or how precise I try to bend the control rod it happens anyway. With my Ringmaster I have more up than down by 10 or so degrees.
I really need to consider using adjustable control rods. Is there a way to fix this? Apart from tearing down the plane?
It never fails when I build these these things that I have more deflection one way than another! No matter how straight I keep things or how precise I try to bend the control rod it happens anyway. With my Ringmaster I have more up than down by 10 or so degrees.
I really need to consider using adjustable control rods. Is there a way to fix this? Apart from tearing down the plane?
Cribbs74- Moderator
Posts : 11895
Join date : 2011-10-24
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Re: Another Tuesday evening CL session
On a profile it's pretty easy, cut pushrod off at elevator and solder on a threaded rod, overlap appx. 1" and wrap with copper wire. But if your bellcrank is centered and you have appx. 10% more up then down (and horn is on bottom) your pushrod is too long and should be shortend with a slight 'z' bend?
Re: Another Tuesday evening CL session
An inexpensive plastic protractor given me by one of our g'kids works well to measure deflection. One, protractor that is
, should be available anywhere school supplies are sold.
SD
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
SD
SuperDave- Rest In Peace
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Re: Another Tuesday evening CL session
I have trouble with the imaginary line extending from the elevator to the scale on the protractor to read it.SuperDave wrote:An inexpensive plastic protractor given me by one of our g'kids works well to measure deflection. One, protractor that is, should be available anywhere school supplies are sold.
SD
I just checked my SS and it's 30 up and 30 down. I have a threaded 2-56 coupling that's made to solder onto the end of the rod. Screw a clevis onto that and it's fully adjustable as long as your bellcrank is free to move far enough in each direction.
A trick I learned from Ken to center the throws is to disconnect the rod from the elevator. then pull all the way down and mark the rod with a sharpie, and mark the fuse in exactly the same place. Then pull up and mark the fuse under the mark on the rod. Now the whole length of the throw is marked on the fuse. When you find the center between the two points, mark it, and that's where the elevator will be neutral. Re-attach the clevis and check for neutral, and screw in or out until you get the center marks lined up.
Just be sure when you build your bellcrank to make sure it moves the same distance in both directions. Sometimes you have to cut a relief in the balsa in front or behind it to adjust the throw.
_________________
Don't Panic!
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
...and never Ever think about how good you are at something...
while you're doing it!
My Hot Rock & Blues Playlist
RknRusty- Rest In Peace
- Posts : 10869
Join date : 2011-08-10
Age : 68
Location : South Carolina, USA
Re: Another Tuesday evening CL session
Thanks guys. plenty of options to choose from now
Thank goodness you guys are here!
Ron
![lol!](https://2img.net/i/fa/i/smiles/lol.gif)
Thank goodness you guys are here!
Ron
Cribbs74- Moderator
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Location : Tuttle, OK
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