daven

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That 270 mah NICD sure looks big

daven

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Got the V-tail halves sanded, angled, and glued to 115 degrees. Trying to decide how to run the elevator linkage, it is quite tight back there. I think I can fit everything inside if I angle the torque rods forward. I understand the geometry is goofy, and it shouldn't work, but it does. I've done this on a couple planes and I think it was the SOP for the V-Vector.

The trick is what rod material to use. I don't think 2/56 will be strong enough, and 4/40 is overkill (not to mention a very tight fit). Is there anything in between, or does anyone else have any ideas?? The stab was 1/4" thick, but its been airfoil shaped and probably closer to 3/32 now...

daven

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figured I'd stain and glass the top of the tail for now while I try to decide what to do.

The second picture is off my Hurricane Fuse with Neme Q tail. You can how much smaller the mini is.

also, still trying to find a tank. Though the 3 1/2 oz bullet tank from sullivan would fit, but its quite a bit too big. How many oz of fuel do I need to get the Nelson .15 to run for a Total of 2 1/2 minutes?? Thats all I need

fizzwater2

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looking good, Dave - let me pull out an old QM and see what size tank is in it.. I can't remember, that's been a year or two (or ten) ago...

PhilMill

Hey Daven, I have a Vortex fuse and I'd like to put on a wooden Neme-Q tail that I got from Terrence. I also have a Neme-Q back half of the fuse..How can I mate these things together?

I was thinking of using the front half of the Vortex fuse and the back half of the Neme-Q so I can just bolt on the tail without going through all of that building and sanding and cutting etc etc....which I'm not very good at...

Got any suggestions. It'll be for 424.....

Or I can send everything to you and you can build it for me....!! LOL

Thanks,

Phil

daven

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Will they let you use a Neme-Q tail in 424 down there? Most areas won't...

It would take a little work, but shouldn't be too difficult. Just take your time

Post some pics so we can better understand what your trying to do and we'll try to give you a hand.

clb

Dave,
When I use pressure fuel bladder tank, I need 100cc of fuel (10 Nitro, 70 Methanol and 20 Ricinus) which is a little less than 3 1/2 oz for 5 minutes.
Here is a link for this type of tank: http://www.clcombat.info/bladder.html
Hope this help,
Claude.
Always interested by your project and hope to fly one small Seeker with my Fora engine see post #10.

daven

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That is helpful Claude, if I can't locate something useable I'll give the bladder a try. A little more progress this morning. Decided to try and make the 4/40 torque rods work and they should be ok. I would have glued them in, but am fresh out of Crisco. I enlarged the elevator a little bit on the inboard side, it was going to be too tight to fit a CA hinge in there.

Last pic shows the tail next to a Neme-Q + tail to show how small this thing is.

DMyer

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Dave,

So exactly how well does that torgue rod arrangement work in the tail? Dosn't the angle at the elevator induce a tortional load on the wire at the point were it is glued into the elevator inducing repetitive stress on the wire and higher servo loads? Do other planes do this (successfully)? I have never built one like that and I am very curious. Thanks.


Dan

daven

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"Dosn't the angle at the elevator induce a tortional load on the wire at the point were it is glued into the elevator inducing repetitive stress on the wire and higher servo loads? Do other planes do this (successfully)?"

Yes it does, but it is very minor. I'll have a better idea how much additional stress after I get the elevators glued on. Just using CA hinges.

The V-Vector had a similar setup and that seemed to work fine. I've also angled Aileron Torque rods forward in the past and it worked fine also. I don't think its the perfect setup, but it does work, and I would never of squezed these in the fuse had I rund them parrallel to the hinge line.

daven

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After 4 different tanks, this one looks to be the only one that makes sense.

It is a 2oz sullivan slant tank, and to get it to fit, I had to "adjust" its shape with a heat gun. It is a hair long, and sticks up just a hair too much in the front. Also, had to remove part of the front former at the top. It really is a tight fit.

Not sure how much 2oz will get me, but thats all thats going to fit without a pen bladder.

Still going to be a bear getting the fuel line out the side, and the crankcase pressure out the nose. Also, won't be much room for foam, may have to use a little armor all.

daven

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Sheeted the wing over the weekend (Thanks AJ), and glued the LE on last night. The wing will be 36" after I buzz the tips off at 45 degree angles. I'd really like to get this done and flown before the snow comes in, but not sure if I will make it. Probably Ultracote the wing, and glass the fuse, still undecided.

I found a 2oz oval tank that fits a little better (not so far forward). I think I will use that instead and it will help with what I assume will be a nose heavy situation.

freeair

some great little fuel tanks are made by PYLON, they are round not flat sided and come in sizes from 2 -4-6-8- oz etc . those slant tanks are a pain in the # when it comes to the front bulkhead clearance.

fizzwater2

My Feedback: (61)

Dave, just extend the two brass tubes out the side of the fuse just behind the firewall through a couple of holes. I had a small quickee style airplane with a 25 on it many years ago, and it had a 2 oz tank stuffed in the nose just about like what you show - the same Sullivan "Pylon" brand slant type. I poked the brass out the side of the fuse, left it stick out far enough to get the fuel tube on it. Never had to worry about pinholes in the tubing inside the airplane, at least.

I'm not sure if they still do, but Sullivan made "flex" tanks - same sizes and shapes, but they were a little flexible. With one of those it was a little easier to stuff the tank into the opening as you worked the tubes out the side.

That plane, if I remember correctly, was around 300 sq inches, 25" long, with an OS 25 FSR. Fun to fly! It wouldn't run very long on 2 oz, so every flight was a dead stick landing, but what the heck..

daven

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I found a 2oz oval tank that fits quite a bit better. It will be back closer to the CG like we run our bigger quickies. The nelson runs on Crankcase pressure, I hope that helps with the slightly longer fuel lines. I want to run the pressure line through the center of the firewall, and the fuel line will go out the side of the fuse. Just trying to figure where the throttle pinch will go. I think it may be easiest to do it internally like Ed likes to do. Theres just not much room around the motor mount to install a tube for the pinch, or to even just smash it closed against the firewall.

daven

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I wanted a flex tank originally, but couldn't find anything smaller than 4 oz.

fizzwater2

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With a 2 ounce tank, you probably won't use the pinch all that often.. you'll just run out of fuel!

Man, wish I was there to see the maiden flights. I haven't heard a Nelson .15 run in a long time. Don't forget your earmuffs when you fire it up!

daven

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I keep spare earmuffs in the trunk

I've never heard one run, so I'm looking forward to it also, but I'm guessing it won't be untill spring unless I get a little more motivated.

fizzwater2

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Dave, what do you have for props on the Nelson? I might have a carbon fiber one around somewhere from back then, and I know I've got a stash of top flight 7-4.5 super maple power props as starting blanks. Even a few 7-5's, and I doubt if I have any of the rev-up props around any more. That's a shame, Rev-up made decent props.

Remind me sometime before spring, and I'll see if I can dig any QM props out, make a few measurements.

daven

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I got a few laid up props from Dan Kane and another offer from Bob27s, but If I can't make those go, I'll be sure to let you know.

Thanks,

fizzwater2

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their props are liable to be better than mine, anyway!

I was never all that fast in QM, more like half-fast.

Now you've got me thinking. I think I still have that old mini-quickee airplane stashed somewhere. It used to use Ace bantam midget servos, and the OS .25 FSR with something like a 7/7 prop on it.. bet it would be a great home for a Nelson or Conquest.

daven

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Dig it out and give it a try. Not sure it will be any faster than it was with the .25os FSR though..

Put the 2oz tank together, and glued my base mounted Bic Pen fuel pinch off. Crank case pressure is in the backplate of the motor, so that runs out the firewall. I like this setup much better than the other tank. Although having the pinch locked up in the nose may be a problem if I ever have to pull the fuel tank...

I'm thinking it might make sense to build a small window in the bottom nose piece so I could re-route lines with a hemostat if need be...

daven

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Was thinking about how will I know when the tank is full? The fuel will start to fill the crankcase??

Buzzed off the tips at 45 degrees on my table saw and then glued some 1/16" balsa caps on the ends and sanded smooth. Starting to make some progress on this gloomy, non race day..

daven

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Wing is 35" long and 7 5/8" at the chord.

About 266" squares, should scoot with the Nelson .15..

daven

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Got a bit more done today and decided to take some weights.

8 oz Fuse / Servos / Switch / Receiver / V-tail
6.5 oz Wing
10 oz Motor / Mount / and fuel tank (w/lines)
1.1 oz landing gear

25.6 oz total at this point.

Whats missing, is Prop, V-tail Pushrods, Top sheeting (and hatch), Potting, Aileron Servo/torque rods, Glass, Covering, and paint.


I see no reason to see it will fall under 3 lbs, its just a matter of how much....