RE: (Something Fast?) Delta Build Thread

RE: (Something Fast?) Delta Build Thread
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RE: (Something Fast?) Delta Build Thread - 6/28/2007 7:42:21 PM

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From: Tulsa, OK, USA
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HaveBlue,
I was tempted to sheet the whole wing and calculated it would have taken an additional 2.77 oz. (79 grams) of balsa. Since my open bays are not huge like on a dust I am not sure what the advantage would be other then strength. Any thoughts on sheeting vs covering when it comes to speed? It seems like tight small areas of covering should not be much of a problem and you do save a little weight. Maybe I shouldn't worry about an oz. or two since it looks like it will have a RTF weight of well under 3 lbs.

I am going around and round in the aerodynamics forum concerning cowls. Could you post a picture of your engine cowl and has it been tested in any way?

About ready to post pictures of the finished product later tonight or tomorrow. Need the rain to stop long enough for a couple of outside shots as they turn out so much better in bright light. 10+ inches of rain last month and may pass that that this month. Maybe I should have been building a boat, A really big one.

I Don't even have a radio for this plane so this may be the perfect time to get the new Futaba 6EX 2.4.

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Mike
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(in reply to HaveBlue)

RE: (Something Fast?) Delta Build Thread - 6/28/2007 8:30:22 PM

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From: Oceanside, CA, USA
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quote:

ORIGINAL: Mike Connor
Aren't you an electric guy? The plans show a back plate mount for an electric motor. The servos could be mounted behind the rear spar and there would be tons of room for a $500 battery behind a Neu 1509. If not a 6.5 would work.

Razor says that there aren't enough fast glo planes at our Revver events so I need to throw them a bone

I also need to fit in with the guys at my field with the Shrikes and Mach Racers.

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I Have EXORSIZED the electrons, this plane is clear.

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 5:53:39 AM

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From: Tulsa, OK, USA
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Four days since I started the build and one day was spent on the engine cowl. No wife, kids, dogs or real job helped get it done quick.
The hardest part was sanding and documenting the build sequence. I did not spend day and night on this project and next time will be quicker. I have two servos mounted but still need a radio for it and a fuel tank.

I was able to calculate the final RTF weight and it will be 2 lbs 12 oz if no tail weight is needed to balance.

My goal was to

Quick build - yes
Low weight - yes
Clean lines - I think so
Low cost - Just under $100 to build and cover
Look good - You be the judge. I kind of like it
Fly good and FAST - Time will tell

I would appreciate any comments positive or negative.

Attachments

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 7:16:34 AM

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From: Calgary, AB, CANADA
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quote:

ORIGINAL: Mike Connor

Four days since I started the build and one day was spent on the engine cowl. No wife, kids, dogs or real job helped get it done quick.

OK, Mike. You can't go posting a thread like this and NOT offer at least the plans if not a short kit. That looks fantastic and I need one!

Mark

P.S. - I guess you could put me in the "positive" comment column...

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 2:00:09 PM

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Thanks Mark,
I just hope it flies as good as it looks. I really need to get a radio so the real test can begin. If it does fly well I could just reorder every thing in larger quantities and stick them in a box for shipping. We will see what happens.

Thanks for your help a few weeks ago on the PDF printing. With the right plotter driver installed I can now print the plans to PDF in exact E size.

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 2:21:45 PM

vicman

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From: Valdese, NC, USA
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More info on the cowel please. It looks great!

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 3:56:17 PM

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Beautiful- ALready a winner I am guessing

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 4:04:01 PM

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From: Middleboro, MA, USA
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Mike,
Nice to see where the cowl ended up, wow that ought to have a nice cruise....

Warp speed anyone?

Bet you will hear that prop unload fast.

< Message edited by iron eagel -- 6/29/2007 4:05:23 PM >

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 4:08:45 PM

vicman

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I can't wait to see what kind of Ghetto covering job you put on this one

It looks pretty good Mike, I really like the trick cowel.

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 6:23:58 PM

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quote:

ORIGINAL: vicman

More info on the cowl please. It looks great!

Thanks for the kind words. As far as cowl concepts, I opened a can of worms in the Aerodynamics forum so anyone interested in seeing my first attempt insulted

should visit the two page thread. Lots of do's and dont's. Those guys know quite a lot about it.

As far as my construction method it is all balsa covered in glass and painted. I worked on it on and off for much of a day to get what I wanted. I started with the engine mounted in the plane. I started with very lite 3/32 balsa that was wet and wrapped it around the front half of the cylinder and extending to the rear. The front was also lite balsa with a hole for the carb intake and bent around the front to the back side of the nose ring where there is one of the two screws to hold it on. I kept adding on to get a snug fit around everything that needed covering. On the inside joints I put 1/4' tri stock so I could round the edges. On the outside at the base of the cylinder I used 1/4" tri stock that was wet and had small cuts on the front and back so it would wrap around the curve. Sand it, glass it and paint it. Covering would have been a real pain. It ended up weighing less then half an oz. and I could probably throw it across the room without any damage.

Is that what you wanted to know?

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 6:36:49 PM

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At this point I have settled on the name "Screamin Demon" (misspelled on purpose) but am open to suggestions if anyone has any ideas. There is also "Ms Raptor" or...

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 7:23:28 PM

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From: WHITTIER, CA, USA
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Looks really well Mikey!

I think I will put a Jett .50 in mine.

It will compliment my jett.90 just fine.
Keep up the good work.
How did u manage no wife, kids or dog?
u can tell me your secret
SJ

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 9:28:03 PM

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quote:

ORIGINAL: SPEED JUNKIE

Looks really well Mikey!
I think I will put a Jett .50 in mine.
It will compliment my jett.90 just fine.
Keep up the good work.
How did u manage no wife, kids or dog?
u can tell me your secret
SJ

Of course the Jett 50 will work fine. I really like twice as much thrust as weight. I am hoping it is clean enough to run some small diameter, high pitch props for serious speed.

I divorced the wife, sold the kids and killed the dog a long time ago and have remained free. (didn't really kill the dog)

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RE: (Something Fast?) Delta Build Thread - 6/29/2007 9:57:40 PM

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From: Oceanside, CA, USA
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Very Sharp, I like it! Simple, clean, and easy to do. Next post we expect a flight report and nothing else!!

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Can you feel that Buddy, HUH, HUH, HUH!!!??
I Have EXORSIZED the electrons, this plane is clear.

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RE: (Something Fast?) Delta Build Thread - 6/30/2007 1:09:31 AM

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quote:

ORIGINAL: Troy-RCU

...we expect a flight report...

You mean I have to fly it?? I does seem like I may have seen a box around here with Futaba on it.

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RE: (Something Fast?) Delta Build Thread - 6/30/2007 1:30:05 AM