VicT's blog View Details
Archive for November, 2018
Posted by VicT | Nov 28, 2018 @ 11:58 PM | 3,961 Views
The stock Radian motor is a 480B BL Outrunner Motor; 960Kv Reverse Shaft PKZ4716 The shaft is 4 mm OD.
The stock folding prop is a 9.75 x 7.5 black plastic design with a 7mm thick base that uses a pin type axle that is held in place when the 51 mm OD spinner is secured to the backplate with two screws. I am using yellow painters masking tape to keep the pins from following out when the spinner is removed.

Using a new Glacier 1300 3S Lipo static current is 19 amps and 190 watts.
Using a new ZDP 1050 4S 70C static current is 28 amps and 360 watts

This is a 360/190 or 89% increase in power and could be used for short but fast climbs with the stock 30 amp ESC.

An aluminum spinner with matching Graupner CAM blades such as 11x8 would improve the strength and climb performance as well.
Posted by VicT | Nov 27, 2018 @ 01:48 PM | 3,533 Views
The clear plastic firewall is glued to the white fuselage foam with a soft white adhesive. Blue paint covers both and can easily be removed for sanding and applying tape, paper or cloth. Iíll be using cloth and CA to reinforce the seam/ fuselage area. Then paint. If paint cracks that will tell me to fix the crack and whatever has caused the crack.
Posted by VicT | Nov 24, 2018 @ 10:04 PM | 3,516 Views
The stock 10.75x8 Valiant prop measures 19 amps and 226 watts using a 2200 3S 45C pack.
A 10x6 Master Airscrew Prop measures 27 amps and 406 watts using a 1500 4S 100 C China Hobby drone pack.

Both fit in the modified top battery door/compartment of the Valiant. This 406/226 = 1.79 or 79% increase in power should increase speed and vertical performance and still be under the 30 amp ESC limit.
Posted by VicT | Nov 18, 2018 @ 10:04 PM | 3,135 Views
I made 8 launches and landings over an 18 minute span to test 8 different patterns and the effect of the COB light in the cockpit. The COB strobe pattern definitely helps with orientation when flown low and beyond 200 ft. The 3M Dual Lock failed a few times to hold the light on the ďheadrestĒ cockpit bulkhead and I will need to improve this. The interior stock LED lights work OK to light up the cockpit but in flight they would be better used if installed on the leading edges of the wings. So thatís another nice to have mod.
Posted by VicT | Nov 12, 2018 @ 05:47 PM | 2,967 Views
Paul did an excellent job pointing out the OLD Radianís shortcomings with incidence and weak structure. After fixing those issues he improved performance with removing slop at the servo output arms and flight control horns. I think the new stab and incidence has been solved but the same long servo arms and horns are used with Z bend slop. I have used CA and baking soda to make a rock hard CA joint and will try this on the nylon Night Radian holes. I usually make a drill out of the pushrod wire I am using. That way there is no slop at either hole.
Using clear tape over the wing protects and strengthens the wing with only 1-2 ounces of added weight. The CG of 91.4 suits Paulís Radian and can be a target for anyone that has questions of their Radianís CG.

Iíve compared both the old and Night wings and except for the fuselage ends and lights they are pretty much equal. The flaperons are the best part of the video. Those that know the value of flaperons will appreciate his flaperon design. Those that do not will say you dont need flaperons.

Paul has 2 inch wide flaperons that are bottom hinged. Most will use simple tape but with Z bend hinges from Tyvek or double sided tape you will have a much stronger hinge. I have a mockup on an old wing panel and will use Robert hinges to see if hinging can be made quicker and easier.
Paul starts the flap about 2 inches away from the fuselage and the flaperon is 23 inches long. He says that 18...Continue Reading
Posted by VicT | Nov 12, 2018 @ 12:23 AM | 3,139 Views
With most of my models I can taxi around and if needed go to System Setup on my DX9 and look at something or adjust a setting. RF is disabled and when I do this one of my models starts up the motor at low throttle. Of course I go back to transmitting and the motor stops turning. I then disconnect the drive battery and resume my System Setup work then go back to powering up the ESC and receiver. I bind all of my models with the throttle off and with loss of signal the motor stays off. Not sure if itís an anomaly or faulty ESC. An arming switch, or plug would be nice to have in or on the model but most do not use it. Iíve purchased and used the Deans Safety Plug but want to know the source of the problem. Any one have some ideas?
Posted by VicT | Nov 10, 2018 @ 05:35 PM | 3,512 Views
I flew the old Radian in places that required confined space landings and steep approach angles. I made 12 inch long flaps and they worked but I wanted more flap area to get more lift and drag. I experimented with a segmented flap design so that the curved trailing edge could use hinges but not bind when flaps were deployed. I found a plastic tube and music wire that acts as a trailing edge coupler. Now the majority of the Radian trailing edge can be used for a flap or flaperon. Servos can be imbedded into the fuselage sides or into the wing panels. Since the FT Radian requires the light plugs be connected I think a 4 pin plug could support the positive and negative power requirements of the lights and servo. The fourth pin would be for the flaperon signal wire. Deans makes a small black or red 4 pin connector that would require soldering. Here are some pics of the flaps and a removable wing tip for a 62 inch wingspan sport wing.

I will post build pics when I start the project....Continue Reading
Posted by VicT | Nov 10, 2018 @ 04:34 PM | 3,349 Views
I lost the two wing bolts and had to purchase some from ACE hardware. I used my Dremel to remove the threads near the Philips head so I could tie a loop of fishing line around it. I can now tighten the bolt and when I remove the bold it is held to the wing with a hole and some CA glue. See Pics
Posted by VicT | Nov 06, 2018 @ 08:06 PM | 3,492 Views
On the third flight the right wheel and axle departed inflight. I was able to find the wheel but the axle was lost in the tall grass. With 3 fully charged 3200 3S packs ready to fly I removed the remaining wheel and used 20X tape over the wheel pant opening. Our club field had short grass so sliding takeoffs and landings were made without incident. The forward mounted main landing Gear and the slightly lower CG prevented nose overs. Full up elevator and flaps helped on early lift offs. I used to use wheel pants for inside gym floor operations. The sliding was fun to do.

On hard surface runways removing the wheels and using plastic from milk bottles could be a better alternative to wheels. Sometimes wheels will trip and cause the model to end up inverted on the runway. Skis or wheel pant devices that allow sliding may offer better ground operations...depending on the surface. On grass the wheel pants allowed shorter ground roll outs and may help out in precision landings in confined space operations.
Posted by VicT | Nov 05, 2018 @ 01:51 PM | 3,290 Views
I damaged a FMS servo when the nose wheel fairing interfered with my foam plane holder. I heard it buzzing and when I removed the plane the servo made noises but did not move the rudder or nose steering. I wanted to fly soon so I removed the FMS servo and replaced it with an ES08 MD2 12 gram metal gear one. The stock servo arm did not fit the new EMax servo so I used one of the arms that were included. The small arm included was too small so I used the largest arm in the box. The holes for the pushrod clamps had to be drilled out and I had to open up the servo mount in order to clear the CF tube stiffener. I used a Dremel with wire drills to do this work.

The taxi tests are very impressive with a much tighter turining radius. This will help in making 180 degree turns to avoid going off the pavement or when avoiding obstacles. I increased the expo to 60 percent to help with small corrections during takeoff and landing rollout.

I wanted to inform Horizon of my problem and when I talked to Sean at technical he said he would send me a 330 reverse servo to my address with no charge. Now thatís service! I will use this servo to replace the EMax servo if and when it fails. This model is popular where I fly and otherís may need a servo replaced. See pics and this video.