Dalton Extra 300 ML build - Page 53 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-21-2015, 11:45 PM   #521
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Re: Dalton Extra 300 ML build

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I missed all of this, and was just back to read this. I am sorry, I am partly to blame, as I asked the question to Gordon. It was my airplane that weighed 45 pounds. I can explain why. It being the first Dalton I built, and the first kit I built that was a 40% sized airplane. Having no experience in building an airplane this big, I was thinking of all the forces that could be applied to it, so it is super reinforced. For example, the cross bracing, the plans call for one on the top and one on the bottom, going in opposite directions. Well, I built mine with double cross bracing, two on top and two on bottom, this was in the shape of an X, instead of a \ or a /

I probably used more glue than most, and it just ended up being heavy, (I am using canisters and a DA 200 ML.).

It is quite cool that ML came over here to this forum to chime in!! that is way too cool!!!!

Gordon has definitely written and posted an excellent build thread, which I use as a guide. He has awesome tips.

OK, here is my update, it is still heavy, and after having been in a bit of an accident, the airplane was rebuilt, and it is still same weight as before, but now it has a different scheme.

Mine has Incidence set at zero/zero, And I do have a down line mix of about 1%.

For this whole year, I flew sportsman, and my airplane was in 8 competitions, unfortunately, on the last competition, in Sherman, Texas, on the friday of the weekend competition, while i was practicing, on the 4th flight of the day, I was coming into land her, and I was about 50 yards away from being in line with the run way, and my airplane landed in a tree.

In any event, I built a Dalton Yak, and I realized how much nicer it flew than the Extra 300, and then I discovered why, after reading Goldman's recommendations on trimming an RC airplane. Turns out, my Dalton Extra 300 ML, whole season long, i was flying it just a tad bit too nose heavy. And this was the problem I was having trying to do a spin entry (Stall), it always looked like I mushed it in, and at Clover Creek, I got like 8 zeros!!!

In any event, the new Dalton 300 ML (new in that, it has a new life, but it is still the same old one), flies real great!!! I intentionally made it just a tad bit tail heavy relative to where it was before.

one of Gordon's friends posted, several posts back, maybe my CG. But i had not read this til now. Wish I had seen this back in April!!

Oh well.
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Old 12-22-2015, 12:26 AM   #522
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Re: Dalton Extra 300 ML build

Hi Orthobird, no need to apologize about a question! I was not offended at all with the replies to the thread that it triggered from MEL and Tony Russo. In fact I was pretty tickled that they took the time to fill me in on the reasoning behind the design. I'm thinking about building one stock to see what I'm missing (that is if Tony will sell me one LOL). Sorry to hear about the problems you had with yours. Mine has had a couple of minor dings but overall has held up really well.
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Old 12-22-2015, 12:30 AM   #523
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Re: Dalton Extra 300 ML build

I am building one now, that is purely stock, per plans, except, I reinforced the wings with carbon fiber. Should be interesting to see what she weighs once done.

the 1/4" square carbon fiber rods are 48" long, and they lock into the plywood of the root cap, and into the balsa of the wing phenolic support. It is glued in with West Epoxy resin, slow set, and a total of two per wing, one on top and one on bottom.

This addition to each wing adds an additional 3 ounces per wing.

I let you know how it goes. Have a good night.
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