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"DDDC175" - Double Dekker Dead Calmer at 175 grams.

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"DDDC175" - Double Dekker Dead Calmer at 175 grams.

Old 07-19-2022, 04:02 PM
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Joseph Frost
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Default "DDDC175" - Double Dekker Dead Calmer at 175 grams.

After the great success with couple of GIANT double dekkers and latest, lightest mono wing creations to add in my fleet, I got a new idea to build the lightest doublewinger after learning few tricks from my last build and the failure of two earlier models, being too heavy for their size, no where near for my intended "slow-low-close" fun flying, but rather a stressful dogs to fly to check my reflexes. LOL.

Giant with the micro doggy.

After each creation learning something new.

Something like this as 'Doubledekker".

At this embryonic stage, my guess is 175AUW, it would be nice if I can beat it lower to reduce the wing load at some 3 grams per decimeter. My last mono winger build flies at 4g/dm, pretty nice for outdoor dead calm but I like to slow it down further to have even more fun during magic twilight hours.

Last edited by Joseph Frost; 07-19-2022 at 11:42 PM.
Old 07-19-2022, 11:55 PM
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Started on the top and bottom new wing design.

DDDC175 project on its way.
Old 07-21-2022, 12:57 AM
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Joseph Frost
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Lot bigger job than expected, this one will take good 120 hours judging by my last 75 h mono project to fully complete. Extremely delicate, it will take some carbon fiber to make it air-worthy for out door action.
More progress well on its way.

Delicate sanding of all cut outs take lot more time than cutting it out!

Handle like eggs job!
Old 07-22-2022, 01:39 AM
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Outer wing supports test fit, and start on the main fuselage frame.

No strength whatsoever at this stage of build.

Slight positive lower deck.

Careful cutouts of center fuse X.
Old 07-23-2022, 01:35 AM
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Coming along, every pic tells the story.



Old 07-24-2022, 01:24 AM
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Daily progress.

Plummed together.

Test fit of cut out slots.

67 grams so far.
Old 07-25-2022, 01:22 AM
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Adding up some weight, had to upgrade Ail. servo to 9g. one, made up all control horns with more carbo fiber stiffeners fitted.


Old 07-26-2022, 01:35 AM
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Double dekker is now bonded together for overnight cure and further carbonizing to stiffen it up.

Elev. and Rudder servo hook up.

Frame joined together.

Adjustable Aileron joiners in place.

Depron landing gear cuts outs.

Keeping the weight to minimum.

Last edited by Joseph Frost; 07-26-2022 at 01:53 AM.
Old 07-27-2022, 01:35 AM
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Bit of a nightmare today! After hooking up and adjusting my Ailerons, the 9 gram servo seem to strip the gear at extreme end travel on left side. Quite a job and total waste of time to remove and replace it, as my intentions was to install the MG one but changed my mind to save the weight!.
Well, double the weight but MG one is in and more reliable to control the large four control tabs, more CF had to be fitted to the whole frame to make it flyable, unfortunately adding more weight as I go, so my planed AUW target is just another wishful thinking.


Now fitted with metal gear servo at 19g. AUW!

It needs more carbon!

Adding on weight!
Old 07-27-2022, 10:06 PM
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Joseph Frost
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Final touches to my latest creation to enhance micro light fleet.

Great colour co-ordination, note the finger hold on the center fin.

Largest so far.
Old 07-28-2022, 01:19 AM
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Joseph Frost
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MAIDEN DISASTER!
It lasted less than 10 seconds, after rotating to some 3 meters I didn't know if I was "Arthur or Marther"! It was just about totaly out of control, rolled on me twice, so I was in such a panic state can't even remember which way it rolled as it happened so quick.
It was only a miracle I managed to slam it down on its landing gear, which suffered a minor brake but I can't believe there is no structural damage to the frame after close inspection, because after this short horrific experience I was sure it's the end of this one.
It took only few more grams of added weight to fix it shortly after but more soul searchin will be needed to find out what's wrong.
Sadly, while being in a hurry to test it in semi darkness, twilight eve dead calm I didn't bring my cap cam to record the drama which would be very handy to analyze the problem. LOL- just a part of RC modeller life.
Old 07-28-2022, 06:55 PM
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Back in order after few more static checks and re-trims for another stressful re-maiden. This isn't the first time I had some control issues with scratch build BI's, some of them were and still are an absolute dogs to fly, so nothing will surprise me if this one ends up in trash, as it would be totaly un-repairable if damaged structualy, always ready to build another one, and LOL.

10 meters of Carbon helped to keep it structualy sound after the maiden crash, Tx to L/G absorbing the impact.

All damage fixed ready for another test flight.
Old 07-30-2022, 12:36 AM
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Four flights today on 4 various capacity batteries, 300-550mA, on lighter packs it might need slight more of prop down thrust. Also testing 3 different props after cutting out new alloy spacers for precision fit to different prop addaptor. Seems like 9x4.7 is the best so far but trying hard to get 9 or even 10 by 2.5 low pitch CF ones which would be a perfect match for this set up.

Cutting out alloy sleves for perfect prop fit.

The best so far, 9x4.7 orange one.
Old 08-03-2022, 12:08 AM
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This hobby is going down the gurgle! Can't get anything I need anymore, not even such a basic thing as light prop variety! Back to cutting down, modifying from what I got on hand. Anyone with light slow flying 9 to 10 inch by 2.3 to 3 pitch send me a PM, TX.

Trying to make my own 10x2.5 from what I have on hand.
Old 08-06-2022, 01:42 AM
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Daily doze of RC, "DDDC175" got few runs today on various lipo packs, slow, low and close, love it.

Twilight hover capture.

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