Martin XPB2M-1R Mars 1943- Scratchbuild

This is the place to discuss and ultimately show-off all aspects of constructing and actually flying your radio-control flying boat models. Pictures of construction, materials used, finishing and action shots of them flying, are very welcome.

Re: Martin XPB2M-1R Mars 1943- Scratchbuild

Postby BillG » Wed May 09, 2012 5:24 am

Beautiful work!
All you guys talking about breakfast. Well it's almost midnight, but I'm sitting here right now with a PopTart in front of me. :lol:
BillG
 
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Re: Martin XPB2M-1R Mars 1943- Scratchbuild

Postby neons » Sun May 13, 2012 1:29 am

Bill Thank You.
I hope you enjoyed the build log as much as your tart. Got more done on the wing and elevator walkways. I am doing panel lines now. She is moving along and reaching 3 months in the build now. I am showing it at a meet next weekend. Should be almost done less a few electronics.
Cheers.
Bob
neons
 
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Re: Martin XPB2M-1R Mars 1943- Scratchbuild

Postby neons » Sun May 20, 2012 10:10 pm

I am constantly adding photos to my photo bucket link above as I move along. Keep an updated check at times.

I had a very nice day May 19th with a rated 10 for weather. I loaded up my truck with 7 planes. 6 were all scratchbuilt E-power foam and composite construction. I had my Emily and Mars as the biggest planes. Then I also brought 2 1/6th scale Bf-109G-6, FW 190D-9, and smaller Kawasaki Ki45 Nick, and Grumman Hu-16 USCG Albatros flying boat. I small GWS Warthog also. You can see the little placards in front of my group of planes

I had them all lined up in the Flag circle we were assigned. I think we had over 8K people show up there today. Our club did a phenomenal appearance. There was a nice variety of planes there. We were only allowed to have a static display. Almost done painting.[IMG]http://i1190.photobucket.com/albums/z459/neons1/Other%20Model%20Projects/2-2012%20Martin%20Mars%20-XPB2M-1%20Build%
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Bob
neons
 
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Re: Martin XPB2M-1R Mars 1943- Scratchbuild

Postby neons » Fri Jun 22, 2012 3:42 pm

6-21-2012 Mars Motors Runnup

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Got more painting done. Doing panel lines is a lot of work. I really enjoyed the challenge. Painting is the best part for me. So after I finished all the shading with my airbrush I stuck it together for a motor run demo and paint photo shoot out in the yard. The motors ran very well. I only ran them on 1 - 4S 5000Mah battery. I did not check the charge on it. There will be 2 of these to get her in CG balance. They weigh about 1lb each.

I just have a few things to add. Tail registration numbers. The top hatch has a radar antenna and a range finder. I need it also to lift te hatch off. The stbd. radial motors are on order yet. I have to trim the ailerons yet. Spray the bottomside with a white oversprayh to soften the panel lines. I forgot to do the airbrushing on the floats also. Very close to finished. It can fly now when these are done. Then video time.

Posted a Motor Runnup Video Here:
http://www.youtube.com/watch?v=Fa53SivuIPc

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<a href="http://s1190.photobucket.com/albums/z459/neons1/Other%20Model%20Projects/2-2012%20Martin%20Mars%20-XPB2M-1%20Build%20Log/?action=view&amp;current=6-21-12FinishPanelLines3.jpg" target="_blank"><img src="http://i1190.photobucket.com/albums/z459/neons1/Other%20Model%20Projects/2-2012%20Martin%20Mars%20-XPB2M-1%20Build%20Log/6-21-12FinishPanelLines3.jpg" border="0" alt="Photobucket"></a>
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neons
 
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Re: Martin XPB2M-1R Mars 1943- Scratchbuild

Postby neons » Thu Sep 19, 2013 4:42 am

Sept. 6, 2013 - Maiden Flight
I had to add a load of weight to the nose to get it safely nose heavy. (28 oz.) I think I can take some out as the plane is sitting down some on the nose. The wind was light through most the flight and picked up to 15mph in the last minute of the flight before landing. The plane tracks very good on the water if flat. When you see the video it will show it. got it up in the air and it was very smooth and handles like calm pussycat. She goes very straight with all that rudder area. I like it alot. I never even touched the trims the whole flight. Smooth and sweet flyer. I was very comfortable with her. She does not need a load of power to go and it flies very realistic at half throttle.

The maiden landing was also smooth. The first attempt was too fast. I slashed the power on the next round and glided and slow turned into the stiffer wind and let it land itself. This is not as cumbersome as many think. Do not let the size fool you. It is going to be a favorite flyer and pleaser. The only thing I found with the size is not to make to steep a bank if there is strong wind. I actually had the rudder used more than the ailerons in the turns. I use the ailerons in opposite position to help it make a flatter but larger turn in slight angles. The Emily is a handful to fly compared to this plane. That plane has higher wing loading. But it has big flaps to compensate. These big wings do not like high angle banking in the wind. The wind will flatten it and the plane will dive out of the sky. Do not ask how I found out.
http://www.youtube.com/watch?v=OzsvpnvnwNQ
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Day 2
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The Nicolaci Float Fly Event Sept 7,2013- Flight #2
After assembly and checkout all the flights stopped to get me up in the air singley.
If I did not test fly the Mars the day before I think I would not have flown at all. The wind was 15mph and sometime more. I flew a flight before to feel the wind out with my Seamaster. I did roundups and landing approaches in the wind to get a correct lineup.
The plane was put in the choppy water and here it goes. I taxied out and started the run. The right float dug in the chop and she looped 360. I straightened it out and full throttle and she lifted off the the water with a graceful lift and banked left smoothly. The wind never made so much as a wing flutter or nudge the whole flight. She plowed right through the wind. Al I had to do is keep my turns with little banking. After a few crowd pleasing low pass flybys it was time to bring it in. I travelled out further and made my roundhouse turn I had to make a 270 degree turn as the wind shifted left slightly. As I made the approach I throttled back to 1/4 and let the weight and the head wind do the work of descending and slowing down the aircraft. She settled in with a small bounce and I throttled it in for pickup. What an applause I got and hoorays.

I had 3 motors only. I never knew it but a far spectator said I took off with 3 motors. I tried to turn the plane and it only went in a circle. I let the wind push it back to shore. Now If I had 3 motors in flight, I never noticed it. My flybys were slow for some reason but not to much slower. I have to run them on the bench and analyze them for any problems I can find.Now for the clincher. There was awards presented and picked up an award for 'Best of Scale" plane. I was ecstatic and received it and had a seat on the grass. Then there was a "Pilots Choice" award. I was called out again. Wow!! This was a mind blower. I never expected that. What a day. I flew a lot and had no crashes with all my flights. No repairs. Oh yes I flew the big Kawanishi "Emily" too. She did great also.

https://vimeo.com/74868568
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