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DERIVATIVE, New 2X2

Old 05-11-2013, 06:53 AM
  #151  
MTK
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: Shimano

This should be cool!

Congrats, Matt! Cant wait to see the finished beuty!
Thank you!

The wings came ot pretty light at 392 and 387 grams w/o servo and wing tube. Keeping in mind their size (525 sq inches each) and full paint, it's pretty fair weight....

Fuse with canopy and chin cowl, 1086 grams

Stab total including tube,211 grams. This is reasonably sized at 240 sq inches soslightly heavierweight per sq inch as wing panels. Needed to be strong for the 55 up front of course

Landing gear, complete with axles but w/o wheel, 4.4 ounces.

So around 2300 grams ready for equipment. That was the goal weight from the start for the completed model.
Old 05-28-2013, 06:43 AM
  #152  
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: MTK

The wings came ot pretty light at 392 and 387 grams w/o servo and wing tube.
Fuse with canopy and chin cowl, 1086 grams
Stab total including tube,211 grams.
So around 2300 grams ready for equipment. That was the goal weight from the start for the completed model.
I've had and continue to have set-backs with health so work on Delta has crawled. But did manage to fit the equipment in it over the long holiday (except did not maiden Delta yet)...

It's a larger monoplane thanwhat we normallysee in pattern, (exceptingthe biplanes and triplanes), at 1150 square inches of wing.

A full 2 meter by 2 meter platform.

All paint, basecoat clear coat finish, over silkspanned and/or glassed wings, stabs and rudder.

DLE55 cc petrol engine on my own design soft mount. ES Composites 55G carbon pipe; hatori header plus extension. Mezjlik 20x12 3 blade carbon prop; TT 3" spinner. Thrust to weight ratio of 3:1 should be a blast to fly.

All up finished weight 4895 grams, which meets the original goal for this model..........

Photos will come as I take them.........Flight report after it happens......
Old 05-28-2013, 07:39 AM
  #153  
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Default RE: DERIVATIVE, New 2X2

MTK. Looking good!! Under 11#s is wonderful. Looking forward to your report. Bob
Old 05-28-2013, 08:25 AM
  #154  
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Default RE: DERIVATIVE, New 2X2

Hello Matt

Congratulations. Under 5000 g with DLE 50 is incredible !
What is weight of the engine ?
Claude
Old 05-28-2013, 10:43 AM
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: papaone

Hello Matt

Congratulations. Under 5000 g with DLE 50 is incredible !
What is weight of the engine ?
Claude
Thanks guys....

Claude the DLE55 is not the stock engine you buy. In earlier pages I show the reworked engine I'm using. With the help of a machinist friend we removed about 3 1/2 ounces of dead weight off the engine.My engine weight is 2 lbs 12 ounces, or 44 ounces. Compared to the OS GT33, that's 10 ounces heavier. In additionthe supporting pieces which include pipe, header, prop, prop bolts, soft rubber iso mount, longer stand offs andcouplers, add another 7 ounces over the same parts used on the 33.

HadI used the OS GT33 from the start, the plane would have been less than 10# RTF. It would have flown like a feather tho with that much wing area. Regardless, that's a great number to work towards on the next Delta, with slightly smaller wing area. Remember, I built the mold for the model in the early pages so I can make another copy anytime. But first I need to see what this one needs to fly right

The powerplant hadbeen run extensively in an Extra (about 25 hours run time). The piped set-up is well understood and of course, fully broken in.

Old 05-28-2013, 11:07 AM
  #156  
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Default RE: DERIVATIVE, New 2X2

Very good effort Matt!
Now you need to do this on a 2 meter Bipe with a 50cc
looking forward to pictures

Bryan
Old 05-28-2013, 11:26 AM
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: flyncajun

Very good effort Matt!
Now you need to do this on a 2 meter Bipe with a 50cc
looking forward to pictures

Bryan
We may want to work on that project together Bryan. Would have to build 2, 2meter wings at about 600-650 squares a piece, each weighing12 ounces RTF....

Some Control line Stunt guys (Bob Hunt) routinely build 700 square inch wings that weigh 7-8 ounces (all paint except open bay), so I doubt that would be a big challenge

Didn't the Argentinian guy say his friend had done that already? A bipe with a 50cc is no biggie except don't know about his weight

But heck, why stop at 2 planes? The next step is a precision aerobatictriplane. CPLR is already flirting with it, with good reason!!
Old 05-28-2013, 05:11 PM
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Default RE: DERIVATIVE, New 2X2




ORIGINAL: MTK



All up finished weight 4895 grams, which meets the original goal for this model..........

That is truly an incredible accomplishment!!
Old 05-29-2013, 06:17 PM
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ORIGINAL: cmoulder
ORIGINAL: MTK

All up finished weight 4895 grams, which meets the original goal for this model..........
That is truly an incredible accomplishment!!
Bob, you have been steadfast in your support for this project. I am grateful!! Thank you!

I am currently away from home on business but when I return I will post the last several photos on this project. Time to move on...........


Old 05-31-2013, 02:59 AM
  #160  
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Default RE: DERIVATIVE, New 2X2

MTK will the new DA-35 be on your bench for testing next. Just curious if its going to be a good power plant for pattern?
Old 05-31-2013, 08:53 PM
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Default RE: DERIVATIVE, New 2X2

I really like the OS GT33; I have several of them....... It has everything we need for the highest levels of pattern. No reason to go to anything else at this time except a rear exhaust configuration OS GT33.
Old 06-02-2013, 07:44 PM
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No maiden yet.....Been away on business. Also the constant nagging leg problems are persistent, taking the fun out of it for me. Haven't flown in 6-7 weeks.....

Did manage to start the DLE this afternoon. I love petrol stuff for it's lack of rust and general lack of maintenance requirements. The engine had been on the shelf the better part of 2 years, yet, after a slight amount of coaxing (15 flips maybe) it came back to life. Powerwise, all I gotta say is awmygoshki....It's gonna be fun

Four pounds of powerplant
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Old 06-02-2013, 07:47 PM
  #163  
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Default RE: DERIVATIVE, New 2X2



A few Delta snaps. I pay particular attention to fits. Here are the cowl and canopy

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Old 06-02-2013, 07:49 PM
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Default RE: DERIVATIVE, New 2X2



Double post

Old 06-02-2013, 07:53 PM
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Default RE: DERIVATIVE, New 2X2

Snaps. Simpler paint job is lighter. I may change some gold areas for white at some point, if I can't see the model
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Old 06-03-2013, 01:25 AM
  #166  
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Default RE: DERIVATIVE, New 2X2

Very nice work! Looking forward to flight report.
Old 06-03-2013, 03:02 AM
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Default RE: DERIVATIVE, New 2X2

Just 3 words: FA BU LOUS!

Hard to conceive that it could be kept under 5kg with that powerplant and such a rich-looking paint job.

You're gonna have it at Pocono, right??
Old 06-03-2013, 04:43 AM
  #168  
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Default RE: DERIVATIVE, New 2X2

Very exciting Matt! Good luck with the finishing touches & first flights.
Old 06-03-2013, 08:56 AM
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: cmoulder

Just 3 words: FA BU LOUS!

Hard to conceive that it could be kept under 5kg with that powerplant and such a rich-looking paint job.

You're gonna have it at Pocono, right??
Thank you!

On the paint job, look from 5 feet away. It is very sheer and can just about see through it in spots. But it accomplishes the intended task

Poconos....don't know if I'll feel up to it, but I'll try, regardless of how the CD feels about my gas efforts
Old 06-03-2013, 08:57 AM
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ORIGINAL: danamania

Very exciting Matt! Good luck with the finishing touches & first flights.
Thank you
Old 06-03-2013, 05:36 PM
  #171  
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: MTK
Snaps. Simpler paint job is lighter. I may change some gold areas for white at some point, if I can't see the model
Matt, what paint did you use? Colors looks good together!!

maustin
Old 06-03-2013, 07:36 PM
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: maustin


ORIGINAL: MTK
Snaps. Simpler paint job is lighter. I may change some gold areas for white at some point, if I can't see the model
Matt, what paint did you use? Colors looks good together!!

maustin
Met blue and met greek gold were polyurethane, Omni. The others were Klass Kote epoxy
Old 06-07-2013, 07:11 PM
  #173  
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Default RE: DERIVATIVE, New 2X2


ORIGINAL: cmoulder

Just 3 words: FA BU LOUS!

Hard to conceive that it could be kept under 5kg with that powerplant and such a rich-looking paint job.

You're gonna have it at Pocono, right??
Bob,

I got a little ahead of myself. I forgot the CDI unit in the 4895 gram figure. Adding that module put me right at 5 Kg.

Here are some more snaps of the finished and equipped model. The tank set-up is the typical 2 line set-up that is so simple, even I can do it. The vent is simply wound around the tank's stem and the feed line is tee'd. So many folks flying gas insist on complex solutions for fuel systems........
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Old 06-07-2013, 07:19 PM
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Default RE: DERIVATIVE, New 2X2

Radio set-up. Neatness counts. The grommets are standard rubber types that do the job of wire protection just great.

The IBEC, VReg and RX are velcro'd in. Come to think of it, so is the tank and battery. I like the battery up top for easy access. I remove the LiPo from the airframe to charge

I've used eye screws to set-up pull pull forever. These are standard McmasterCarr issue
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Old 06-07-2013, 07:33 PM
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Default RE: DERIVATIVE, New 2X2

Engine treatment.....

I didn't take any snaps of the rubber iso mount and the nose ring arrangement. I have photos of those set-ups early in the thread

I've discussed the coupler arrangement before. It is molded (shaped to fit) from ceramic and Permatex Ultra Copper. The plastic tie wraps are plenty to hold them in place without melting (spun alumina is a great insulator). Should work well on YS exhaust too

The spark plug wire usually comes with a spring clip that is a total pita to work with. My solution is to toss the spring clip and add a short length of silicone rubber. It holds great but allows simple plug cap removal
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