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Magnus Build thread - TJIRC

If anybody is looking for another ballast option, I hammered two 5 ounce lead fishing weights into the size of the ballast bay. Just fits. Also had some brass square stock on hand, maybe a bit thinner than ideal, but it’s what I had. The six brass pieces total 7 ounces, lead totals 10 ounces.
 

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Wish the winds were cooperative enough to consider using ballast with my Magnus.

Took it out for a first flight the other day only to have the winds shift direction and weaken. Fortunately had some combat wings to fly instead.
 
Well got a couple of short flights in with the Magnus today. Flies well, and fast. However need a little more elevator and the flap to elevator mix needs adjusting. That resulted in a doink landing that broke the flap control horns. Everything else seems fine, but going to need to T88 them back in place and be a little less aggressive with the flaps near the ground until I get the mix looking good out front. It really carves up the air nicely and eats up a lot of horizon.
 
JJ Colorado said:
Well got a couple of short flights in with the Magnus today. Flies well, and fast. However need a little more elevator and the flap to elevator mix needs adjusting. That resulted in a doink landing that broke the flap control horns. Everything else seems fine, but going to need to T88 them back in place and be a little less aggressive with the flaps near the ground until I get the mix looking good out front. It really carves up the air nicely and eats up a lot of horizon.
Click to expand...
Do you have a flap activation switch that enables or cancels flaps JJ? If not you need one, and if you do just fip it off when you are about to touch.

Having said that, its easy to forget and wipe them off - or break the horns. Maybe add a message...Flaps up!...Flaps up!

Cheers,

Doc.
 
Great to hear that you like how it flies!
Funny story, i was flying my little Kunai warmliner the other day. It doesnt have flaps, throttle is on the stick, unlike my other e gliders where throttle is on a switch, and flaps on the left stick. I normally raise glider flaps back up when plane is a few inches off the ground to avoid damage... Landing the kunai I instinctively pushed the stick full up to lift the flaps as it was touching down, but gave it full throttle instead. Worked out, but could have been carnage.
 
Well, a lot of things contributed to the doink landing. Winds were about 10-15 mph and had a gust differential of 10mph, so I wasn't comfortable with flying it close to the ridge. This is a new site for me and the wind direction was from a new direction. Good news is that this site works in almost any direction. Bad news is that the ridge and some areas close to where I would likely land had some large jagged boulders. I avoided the boulders, but in the process doinked it. In hindsight I should have just flown more and worked out the flap/elevator coordination, but what caught me was that I expected it to slow down a lot when turning back into the wind, and it proved to be very slippery so I had to put it in before it made its way back to the rocky ridge. Oh well. A little T88 and some patience should have it back in the air soon.
 
Jonathan Wells said:
Ailerons
The servo hatch recess and control surface hinge are perpendicular. Measure 13mm from the outer recess and mark..
I draw a line parallel to the hatch recess, the right hand side of the image is the side of the G10 horn (clevis pin entry). Transfer to the top surface for the crossover linkage.

View attachment 3255View attachment 3256View attachment 3257View attachment 3258

G10 Aileron Horn.
View attachment 3259View attachment 3260View attachment 3261View attachment 3262View attachment 3263
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I'm just starting to put together a Magnus. I'm planning out the elevator linkage, but it feels like there will be some shear angle between the control rod and where the linkage meets the horn as I've tried to show below which is a view from the top. Is this a problem with the metal clevises which aren't really designed for motion in the sideways direction? If anyone could post detailed photos of their elevator install and any info about offsetting the control horn on the elevator etc. I would be interested. Thanks.

ElevatorLinkage.png
 
scruffmeister said:
I'm just starting to put together a Magnus. I'm planning out the elevator linkage, but it feels like there will be some shear angle between the control rod and where the linkage meets the horn as I've tried to show below which is a view from the top. Is this a problem with the metal clevises which aren't really designed for motion in the sideways direction? If anyone could post detailed photos of their elevator install and any info about offsetting the control horn on the elevator etc. I would be interested. Thanks.

View attachment 20480
Click to expand...
Ball linkages if you are worried.

Doc.
 
We can order whatever you would like. But typically the fuselages will be RF friendly as shown in your photo.
 

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