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Posted by highspeedirt | Nov 20, 2014 @ 08:35 PM | 2,555 Views
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This is version 2 of the last build which went together much easier since I decided to use parts from Dynam's Su-26. The wings, elevator stab and LG set me back about $50 bucks. A carbon fiber arrow from Walmart can be used as a wing spar. Thought they would have used a spar with a larger diameter like the ones found on Dynam's warbirds. The fuselage is from my original design and the main wings are held in by blind nuts and nylon bolts.
AUW is closer to 50oz. on this one but it still performs really well. The tracking was improved by adding the Dynam wings and I especially liked how well it knife edged.
Posted by highspeedirt | Oct 13, 2014 @ 04:05 PM | 3,288 Views
This summer we had one of our rc pilots show up with an Aerobeez Extra 330 "hybrid" plane.
I was really impressed with it and decided I needed to build one. The last build I did of the Sbach looked good but was too heavy. At 58oz. AUW it was a pig and it always wanted to nose in when I throttled up, which I couldn't correct. So, my challenge was to get the weight down to 40-45oz. AUW. and hopefully have it perform as well as my "Stars and Stripes". This is what I ended up with.

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The build weight is 38oz. and the AUW is 45oz. The airframe minus the motor, esc, servos and hardware weighs 23oz. I shaved a few ounces on the wing design by removing all of the paper on the dollar tree foam I used for it. It's a bit more fragile but still rigid with the carbon arrow I used as a spar. I used packing tape to hinge the ailerons so it's seemless. I avoided using hot glue as much as possible. Instead, I used a spray adhesive, Beacon foam tac or white Gorilla glue. The fuselage was done with elmers foam board. I decided not to use a spar along the fuselage this time, once I applied the outer skin it was rigid enough. Canopy fashioned from a 64oz. soda bottle

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Posted by highspeedirt | May 28, 2014 @ 10:43 PM | 3,500 Views
Got the itch to build something and really wanted to attempt to build a copy of my 1280mm Sbach 342 that flies like a "slippery pig". My main goal was to keep the AUW under 48oz so I could utilize some extra 4s 2200ma lipos that I had and end up with a better performing plane.

I already had a spare dynam 650kv, 50a esc, servos and hardware laying around. The cost of the build materials was under $30 for a 5-pack of white styro insulation for the fuselage, two sheets of dollar tree foam board for the main wing, a sheet of Elmers foam board for elevator and aileron stabs, and 2 carbon fiber arrows for spars. Colored packing tape was also used.

Sorry, I didn't take any build pictures, but there's great build videos on youtube for making airfoil wings. The most time consuming part of the build was gluing 4 sheets of foam board together then cutting then shaping the fuse. Also, I glued one of the carbon arrows along the length of the fuselage near the bottom for support. The other carbon arrow was used as a wing spar. I strengthened the elevators with bamboo skewers.

As the build was progressing, I was well within my weight limits but was worried about being tail heavy. When I finished the build with the installation of the landing gear, the c.g. was near spot on.
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Posted by highspeedirt | Aug 17, 2013 @ 12:38 AM | 4,671 Views
Nitroplanes had this on sale for cheap and I always wanted a 3D or acrobatic type plane. Even though there wasn't any info on a build for this Sbach 342 Thunderbolt, the build wasn't too difficult if you have some experience with pre-built balsa kits. Warning, the included instructions are extremely poor.
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Posted by highspeedirt | Jun 04, 2013 @ 12:12 AM | 4,485 Views
Posted by highspeedirt | Apr 29, 2013 @ 11:42 AM | 5,092 Views
I picked up a HK-010 Power Analyzer to run some test on three dynam 500kv motors, mainly to see why my dynam Fw-190 performed much better than my Corsair and Bf-109.

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Two of the motors were pulled after upgrades and setup with a 45a esc. The third was in my Fw-190 that has a 50a esc. I ran the tests with various sized 4s lipos at WOT for 10 seconds with some interesting results.

Fw-190 13x7x3 prop 50a esc
Gens Ace 2200ma 25C----450w@30a
Sky 2200ma 20C------------370w@27a
Nanotech 3000ma 25C----450w@30a
EZ Flight 2200ma 35C----400w@28a
Nanotech 3300ma 35C----450w@30a
Nanotech 2200ma 25C-----350w@26a

Dynam 500kv #1 13x7x3 prop 45a esc
Gens Ace 2200ma 25C----450w@30a
Sky 2200ma 20C------------370w@27a
Nanotech 3000ma 25C----450w@30a

Dynam 500kv #2 13x7x3 prop 45a esc
Gens Ace 2200ma 25C-----480w@32a
Sky 2200ma 20C-------------380w@28a
Nanotech 3000ma 25C------470w@31a

Bf-109 14x9x3 MAS prop 45a esc
Nanotech 3000ma 25C-------490w@34a

Corsair with Turnigy G32 530kv 14x9x3 prop 50a esc
Nanotech 3000ma 25C-------563w@40a

Bf-109 with Dynam 650kv 13x7x3 prop 50a esc
Nanotech 3000ma 25C------650w@45a

The first thing that I should say is these results obviously vary depending on the quality, condition and C rating of your lipo. Most of my lipos have heavy use, except for the 3300ma Nanotech, which is fairly new. I have seen higher wattage results posted. I tested the upgraded motor in my spitfire and the numbers where...Continue Reading
Posted by highspeedirt | Apr 13, 2013 @ 10:35 PM | 6,886 Views
Added an intake airscoop and opened the side air intake.

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Posted by highspeedirt | Mar 08, 2013 @ 09:13 PM | 5,918 Views
Some pics of split flap install, enlarged wheel wells for 2.75in. wheels and a repaint.

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Posted by highspeedirt | Jan 18, 2013 @ 04:30 PM | 6,212 Views
This is the Dynam Corsair set up with a Turnigy G32 530kv motor and 4 blade fms 14x8x4 prop and hub assembly. To set this up you will need to replace the stock prop adapter with dynam Fw-190 prop blade holder.
The Fw-190 prop adapter is 10mm longer by design to accommodate a prop and spinner and has the same M8 thread as the Corsair adapter. The FMS 4 blade prop hub is already drilled out to fit on a M8 threaded adapter so it was a perfect fit.

Links to 4 blade props and hub:

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Posted by highspeedirt | Dec 12, 2012 @ 04:14 PM | 5,396 Views
I had a 2s 800ma lipo sitting around and decided to put it to use to power the LED's on the wing tips and 2 xmas lights that I installed on the canopy guns. I wanted to make them look like they were BLAZING!. The wiring uses a y-cable that supplies power to the wingtip LED's wired in parallel, each one has a 100ohm resister tied to it. The other lead of the Y- connector supplies power to 2 white xmas lights wired in series(each lamp requires 2.1v). The battery is attached with velcro and fits nicely under the canopy. I tested it for 5 minutes and the circuit used about 0.2volts. Next will be to add a flashing circuit to the gun lights and maybe 2 more lights for the wings leading edge.

Update 5/13 Installed Xmas light sockets in wingtips, guns, and on the bottom of wing. Wingtip sockets are wired in series and connect to one y-connector. Gun sockets and bottom wing socket are also wired in series and connected to other y-connector. Installed a Red flasher lamp in the bottom wing socket. Guns now flash slowly. Visibility is very good!

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Posted by highspeedirt | Oct 23, 2012 @ 03:29 PM | 5,224 Views
Posted by highspeedirt | Aug 29, 2012 @ 09:50 PM | 6,073 Views
Posted by highspeedirt | Aug 23, 2012 @ 11:01 PM | 8,668 Views
My first attempt to fix the rotating retracts from jamming when closing, by filing the housing and going over that with a pencil, helped but not enough. The steel pin would still randomly jam into the side of the housing and stop the retract from closing. Biggest problem, I think, is the flat end of the steel pin needs to be shaped more like a bullet. If i only had a dremel. So, instead I decided I would use something to block the pin from jamming itself, like a small piece of plastic. So I cut a 10x10mm square from the lid of a butter tub. Removed one of the retract mounting screws. Used an exacto knife to open a hole for the screw and mounted the plastic piece on the retract. It's thin enough and doesn't interfere with the strut holder.
As an update the plastic from a gatorade bottle works better.

So far this has stopped the jams when closing the retracts.
Posted by highspeedirt | Aug 21, 2012 @ 11:50 PM | 6,217 Views
Looks like Dynam has made some improvements for the release of the Corsair.
The esc is now a 50 amp and hefty with the added heatsinks! Control horns are much better and attached with screws. There is a pair for the elevators and one that's a bit larger for the rudder. There is good acces to the ESC, so swapping it out is easy. Retracts are still hit or miss. They still hang a bit, plus I had to remove some foam where the struts would catch. They would randomly get stuck, seems the problem is the small steel pin gets hung up in the rotating process. It was always the same spot on the housing. I ended up filing the edge of the housing so it was smoother and going over it with a no.2 pencil, so far it works. As for the build, the directions are the worst I've seen. I don't recommend using glue provided. If you want to glue the wings together use a foam safe epoxy. There is section of the tail that will need some gluing along with the pilot and canopy. Other than that, all the pieces fit securely with screws provided.
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Description: 50 amp stock esc for Corsair, 40 amp stock esc for FW-190

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