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Marquart Charger MA-5 Biplane Build

Started by dlabby, September 18, 2018, 09:38:51 pm

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Lane C.

Darrell, cockpits look nice. Lots of details in them. You moved thru this build fast! Going to fly it in the Scale Meet?
Current Build = F6F TF 86" Hellcat
Just Finished = Meister 118" A6M3 Model 22 Zero
Future Build = BUSA 1/4 Fokker DVII

dlabby

Short answer is 'maybe'. If it flies good and I get a fair amount of practice time with it, I might. I am getting documentation package together.
Darrell Abby

dlabby

Assembled the Charger in the driveway for engine run Monday afternoon 3/11. Took a while to get fuel up to the choke/carb but it finally fired and we were off to the races. No carb adjustments yet. Good idle at 1700-1800 rpm; no hesitation with throttle up. Could not get top end rpm without some help. Stopped and start several times. Running a 22 x 8 Zoar so far. I need to reduce the diameter to increase the prop ground clearance. So I installed the cowl and spinner; then no ignition light. Rats. I thought it might be low ignition battery so charged it some-no joy. After disassembly, I found that the ignition light wire had simply disconnected. Whew. This week is not looking good for flying.
Darrell Abby

dlabby

March 14, 2019, 08:54:54 pm #63 Last Edit: March 15, 2019, 09:38:45 am by dlabby
It was a disappointing Charger day. After only a couple minutes of engine run I noticed one of the upper tail braces had broken and was gouging the surface of the horizontal stab. Ouch. The repair of the high gloss surface will be visible. Manufacture of 4 new, heavier braces is underway. Thanks to Mark for his instruction on tail brace ideas. Number 2 is that I have decided that the plane is tail heavy so that means a nose weight job. Number 3 is that 3 upper wing attach bolt have shaken loose (not all at once). Not good. There are eight 4-40 socket bolts into blind nuts. I will try lock washers. Nancy did take some photos today but they aren't up to her standards; try again on cloudy day or in some shade. I had visions of maiden flight Sunday 3/17 but now not sure. It may just be taxi tests to check out vibration/loose bolts/engine run time.
Darrell Abby

dlabby

March 18, 2019, 07:25:30 pm #64 Last Edit: March 18, 2019, 07:31:39 pm by dlabby
Monday 3/19: Gorgeous day for flying with light east wind. Lot of activity including big warbirds, 2 ME-163 rocket light-offs, new planes, and everything else. I flew the Charger 2 times so the maiden ice is broken. After landing the pilot had a smile on his face and he was still wearing his sunglasses and leather helmet. I could feel a little engine heat in the cockpit keeping him nice and warm. One upper wing 4-40 bolt loosened on flight 1. This problem came up on driveway engine run. I switched from lock washers to flat washers and neoprene rubber washer and I think this will keep the bolts tight. Something to keep an eye on. The new DA-50 started easily and is running rich while spinning the 21 x 8 Zoar prop. I flew in low rates and roll rate was nice; the plane looped easily. It flies very true and solid. I will learn to slow down a little more on landing perhaps eliminating today's bouncy landings.
Darrell Abby

Lane C.

Darrell, a nice looking build, seeing it in person. Great maiden flight! Nice day for any kind of flying. Congrats. Lane
Current Build = F6F TF 86" Hellcat
Just Finished = Meister 118" A6M3 Model 22 Zero
Future Build = BUSA 1/4 Fokker DVII

dlabby

Thank you, Lane. That TopRC Spitfire is nice and looks great in the air, also.
Darrell Abby

Barry Ponder

Top rate job. Hats off to Darrell for a great first flight and a beautiful biplane. 
Barry

dlabby

Thanks, Barry.
Charger update:
After 4 flights the soft Robart tires rolled off the aluminum hubs. Robart response: Oh yes, for 18 lb plane those 4.5" tires are supposed to have foam inserts. Well, duuhhh...why weren't they in there then? They sent me the foam inserts (nice of them, eh?) and I installed them. Problem solved. Second problem has been broken tail strut wires on 2 of the flights. New heavier ones have been fabricated and installed. So the bird is ready to go again. She has 12 flights on her so far and Nancy has taken airborne shots. She has yet to work them and pass them to me.
The DA-50 is performing perfectly so far. The plane has plenty of power for aerobatics; it flies true and deliberate. Landings still need practice to keep from bouncing; also need to learn how to avoid bumps and humps in the runway. I hope to get in more maneuvers practice for the scale meet May 18 but not much time left.
Darrell Abby

dlabby

Fifteen total flights now. It is flying so good, I added flying guy wires for static judging. I used white elastic thread; the real wires were silver. I'm not real happy with it and they will be very difficult to install at the field. Nancy has processed the airborne photo shoot. Here are a few:
Darrell Abby