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Great
Corky I like this looks good and easier to build than what I have been working on. I cut a round firewall with a small hole saw and the sides will bend around it easily but the result is a really tight front of the fuse. Looks like it might be possible to remove the motor with your design. I would like to buy the modified parts if possible, please PM me a price and I would be grateful. Should make it quick to finish, just assemble and cover the fuse an install the electric bits.
thanks |
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I worked on it more today. I decided to try the Snipe E spinner and had to shorten the nose and replace the ring as it needs some the motor sticking out the front because the spinner goes past the front of the motor. The Snipe spinner requires a fair amount of carving to allow the prop blades to open all the way. I also had to sand back the upper side rails that locate the wing mounts to get room for the servo arms to clear but it wasn’t bad. I’ll probably go with 1/16 instead of 1/8 then just run the lower stringers in the front so you have more room side to side to position the servos under the wing. It’s a tight fit there otherwise. I think the motor mount and front ring would probably be the most challenging without the laser. The servos are in, receiver bound and radio is setup. I’m down to installing the back horns and doing final assembly of the goodies under the hatch. It should be all together tomorrow and hopefully fly on Saturday. |
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I'm really tempted to try some 5g servos in this model. The smaller size would help a lot. Not only weight but the smaller size would help with routing and smooth control rods on the electric. I ended up with some Bluebirds HV107 I had that have a lower profile from the top to the mtg flange. These are 10g each. They are included in my weight so just think. The control surfaces don't require much but the rods need to be nice and smooth.
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Last edited by CloudSniffer; Aug 13, 2020 at 11:13 PM.
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I have used these with good results in a few planes recently.
https://hobbyking.com/en_us/blue-arr...sec-60deg.html They should be ok in a slow flyer. I’ve used in a 1m dlg and they handle it ok. I’m no gorilla launcher but for the electric YJ, I recon be fine. I recon a pull string/ torsion spring set up would save a bit of weight and add some flexibility in mounting. |
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Everything is together now. All I need to do get it balanced then secure everything. |
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Sounds pretty good. I was working on getting all electronics setup this morning and one of the Bluebird HV 107’s started spazzing. I pulled the horn off and it started spinning in circles and wouldn’t stop. Brand new, I won two of them in a contest so I’m not out. Funny, in these smaller planes I usually don’t go for high end servos like these. I have never had a problem. Then you try something expensive and it doesn’t work. Go figure.
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It’s all done ready to fly. Even the wing panels are taped. I ended up at 231g 8.25 oz. it now weighs the same as my line launch model. Didn’t have to add any weight to balance it, just positioning the parts under the hood.
Honestly I thought I was going to be just over 250g so I’m happy not to put my number on it. I plan to fly it a little in the morning. We’re in the middle of a heat wave at the moment. |
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Been there before
Couple of years ago I built my son a small epp flying wing to fly in his back yard, I used the servos th kit manufacturer recommended and one was bad from the git go. Once he replaced it the plane flew great. I am excited to get the new pod parts and get this puppy in the air, a little nervous about the maiden but I think it will be fine. I I have a department head/freind who wants to learn to fly so that will be fun. My retirement is official as of Sept 30 after 38 years, woo-hoo.
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As far as the pushrods go, why not run them on the outside of the boom? it opens up some more flexibility as far as mounting goes, as you are not restricted to getting them inline with the I.D. Or at least run the pushrod for the h.stab external? Works great for me. |
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I started out early yesterday morning to meet a couple club members at the club field about 40 minutes away. After getting the 1.5e ready I gave it a good hand toss. It climbed up nice, I gave her some rudder and it spun around to the left and the more I gave it the worse it got. It kind of cart wheeled in and knocked the fin off. I thought maybe the battery slid forward but wasn't really sure what happened.
I packed it up and headed home, didn't have any CA with me. All the way home I'm thinking how strange that it really didn't fly well at all. Once home I glued the fin back on, no big deal then headed to the local park a couple minutes away for another hand toss. One last check, what the heck the rudder was reversed. Seemed strange, that's never happened before. Did some more hand tosses and got it trimmed fairly good and things were looking up. This field is littered with huge light poles as it's a soccer field. So I'm thinking I sure would like to motor launch it, do I dare the first time with all these poles. I couldn't resist, gave it about a third throttle and sent it off. Smooth, straight, got my fingers on the sticks and gave her more goose. Climbed up nice, at full throttle I had to push in a little down but it climbed at a nice steep rate. There was some breeze cycling through but it was obvious it flew nice and was showing lift very well. I ended up doing 4 motor launches to about 100m then decided to check the battery. It showed it still had almost 2/3 charge left. Ok good, I'm happy with that. I'm also happy she flying now and still feel strange about the rudder setup. I was sure it was right but the original bluebird servo that failed was on the rudder. I replaced it with a HS53 and didn't think much about it except centering. Could different servos go opposite directions? Now for more flights and fine tuning. We're having a record setting summer, the monsoon hasn't showed up. We have had more days at 115f in history here. |
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life gets in the way
So other than trying to determine where the components go to balance I have not done much, but I do have a question. I am currently working with the emax 2800 kv you first showed Corky, is that what you used? It appears I need to cut 1/8 to 3/16 off the nose depending on my use of the lite ply spacer you provided. Any advice would be appreciated as I plan to spend at least a day on this this weekend.
thanks |
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