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Post by jase on Oct 4, 2007 21:04:14 GMT 10
yeah. it recommended the Hitec 85MG servo's.. micro metal gear servos.
and the servo's go 1/2 way down the wing. standard sized servo's won't fit.
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Post by jase on Nov 2, 2007 11:07:14 GMT 10
to update this thread. My servo's finally arrived and i have once again started on finishing this plane off.
At the moment, all holes have been cut and only a few little things stand in the way of securing them in more permanently.
on another note. My Macchi is no more... i was gonig to sell it, but i wanted the receiver out of it and this kinda made me hack into the plane. But no biggie, i plan to use the Macchi to make another plane out of it. I have absolutely no idea if it will work and through the use of absoutely no kinda of computer programs i'm gonna wing it (no pun intended).
I will use standard size servo's taken from the Macchi and put these into the wings of the macchi creating another Delta wing plane. but might modify this plane somehow to add bolt on bits for different flying, whether that be at SC or DS'ing. i guess we will all have to wait and see the outcome.
The only things stopping me from completing everything is the lack of my own computer radio to set all the trims and other finer adjustments.
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Post by callun on Nov 2, 2007 11:59:57 GMT 10
I'm sure you've realised it, but don't go setting anything in permanently until you have a radio to test everything works.
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Post by jase on Nov 2, 2007 12:44:41 GMT 10
yeah.. at the moment i'm borrowing one of andrews Transmitters so i can set the servo's to neutral position so i can install everything and have everything ready to go when i get my transmitter back.
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Post by jase on Nov 2, 2007 23:04:47 GMT 10
ok. radio gear is in,
but
servo's aren't glued in yet, nor is the battery charger jack, and nothing is plugged into the receiver... but i've done this so i can make hatches later to go over these parts incase i ever need to pull them out or other worse case scenarios.
i think i put too much spackle on the wings, but thats no big deal as i plan to sand it right back anyway. i think i got more on my fingers and this stuff is hard to get off..... hopefully, though, i've got the right consistency of spackle to PU glue.
tomorrow i sandback the whole plane and connect all the radio gear up and fingers crossed i install the fueslage and give the plane it's covering.
but still i won't be able to fly this thing until i get my radio back.....
pics when completed
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Post by jase on Nov 2, 2007 23:06:21 GMT 10
oh. i should add..... charger jack is connected into the receiver. if i didn't do that, i'd be really stuffed at this point  |
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Post by jase on Nov 7, 2007 22:42:41 GMT 10
well finally some good news.
plane will be ready to fly this weekend.. i picked up my radio today after the small drama i had with that.
and plane is 1/4 covered.
things that need to be done.
elevons shaped, fibreglassed, covered and installed, control rods made up and installed.
then a flight test at Mt Mee .
Sunday however i've scored myself some tickets to the Cricket at the Gabba. so having waited this long already to get the plane up and going i am forced to wait another week... lets pray for some good winds.
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Post by thevon on Nov 8, 2007 6:59:05 GMT 10
Jase, glassing the elevons is fairly serious stuff - I've never done that. As I understand, the benefit is that it stiffens them to reduce flex and more importantly flutter at really high speeds. But you need to be able to DS very well for that to be a concern. I've never yet got my planes to flutter badly - Sean has, but he's flying much faster. What I'm suggesting is unless you're particularly keen to do it, don't do the glassing. Just smear lots of cheap CA (get it from that Suprise Gifts discount shop at Rcliffe) all around the edges. Press them flat on some plastic film while drying. CA really stiffens balsa. Next day spray lightly with 77, let dry and neatly wrap them lengthwise with bi-di filament tape. A proper hingeing job will redulce slop too. Come around and I'll give you a hand with that. They'll well and truly be stiff enough for you. The benefit also will be that the elevons will be more durable, ie bend a bit rather than cracking the glass. To be honest I'd also suggest having 2cm of fixed elevon at the tips so that you hit them in cartwheels rather than belting up your nice elevons. Other opinions guys???
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Post by jase on Nov 8, 2007 7:38:10 GMT 10
it only recommends a X of 5/8" fibreglass cloth at a particular point on the elevon.... not the whole thing.
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Post by ezza on Nov 8, 2007 7:47:00 GMT 10
Good to hear it is coming along Jase.
I think Andrew is right. I haven't tried the CA thing but it sounds like it works real good. I just cover the elevons with Profilm and I have not had any flutter problems yet. From RCG it sounds like this setup is good enough to 150+mph, alot faster than I have been able to get a foamie to go around here. Also, the lighter the elevons are, the less lead you need in the nose. You have 2 ballast tubes if you want to make the plane heavier, for the good days. On my reaper I left 60mm or so of elevon stock, fixed at the ends. Just remember to set them with a little reflex(up) or your elevons will sit up higher once trimmed. You can do it either way but yes this has proven to be a little tougher in a crash.
Eric
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Post by ezza on Nov 8, 2007 7:55:05 GMT 10
it only recommends a X of 5/8" fibreglass cloth at a particular point on the elevon.... not the whole thing. Sorry Jase, did not see your latest post. Maybe it is not that big a deal then? |
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Post by sean on Nov 8, 2007 11:08:03 GMT 10
Just want to second the fixed elevon tips idea, it'll make your plane much more crash tolerant. Since doing this to my Bat it's become almost indestructable. When the elevons went all the way to the tips they were a real weak point in crashes.
Regarding the FG X on the elevons, it sounds like more trouble than it's worth, we just don't get the speeds they do in the States.
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Post by ding on Nov 8, 2007 17:40:05 GMT 10
Boys, CA would help the rigidity of the ailerons, but it will also make them more brittle. In some cases this could be a disadvantage.  |
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Post by thevon on Nov 8, 2007 17:53:11 GMT 10
Agreed re: the CA and risk of brittleness. Seems to work for me so far though, as a way of increasing stiffness and adding negligible weight, for fins and elevons. Hey maybe the X of glass that Jase describes is where the horn mounts?? Not a bad idea - mine are always crushing in.
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Post by jase on Nov 8, 2007 18:20:53 GMT 10
i think you are right there andrew. doesn't specifically say it in the instructions, but looking at the diagram appears the control horns do go on the fb.
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