Extreme 88" Extra Stab Problems
#1
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Extreme 88" Extra Stab Problems
Hey All,
I recently purchased a part built EF Extra. Im just getting around to the final fittings and have run into a slight issue. When i put the stabs on the forward retaining tabs and the metal peg dont line up with the pre fitted / drilled holes on the fuse. Ive attached a few pics have i missed something here?
Any advice much appreciated, cant wait to fly it but at the moment im a little baffled.
Thks in advance
I recently purchased a part built EF Extra. Im just getting around to the final fittings and have run into a slight issue. When i put the stabs on the forward retaining tabs and the metal peg dont line up with the pre fitted / drilled holes on the fuse. Ive attached a few pics have i missed something here?
Any advice much appreciated, cant wait to fly it but at the moment im a little baffled.
Thks in advance
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RE: Extreme 88
There were two (or more) different stab/fuse designs as time went by. I found this out when ordering replacement parts. I just drilled new holes and used a wood screw with no ill effect. Make sure to check your incidence, it may well be off because of this. Thor.
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RE: Extreme 88
Thanks for the reply,
Looks like the distance between the holes is 80mm on the fuselage, do you know if that makes it the older or newer one?
Dont suppose you know if the stab with 80mm gap can still be sourced?
Thanks in advance
Looks like the distance between the holes is 80mm on the fuselage, do you know if that makes it the older or newer one?
Dont suppose you know if the stab with 80mm gap can still be sourced?
Thanks in advance
#6
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RE: Extreme 88
I hear ya. We've all been there...and will be there again I'm sure. It just depends on the project. If you mark the holes using the incidence meter you will be fine. Get the stab at 0 then mark the anti-rotation dowel with a sharp pencil or black Sharpy. Drill the hole. You can tweak the incidence with a round file if your hole is off a little. Just fill in the voids with quick curing epoxy. Once you get the anti rotation dowel perfectly set, just mark and drill the blind nut holes. Pop them in...check the alignment. If they are good put a little ca to hold them in. Even if they aren't perfect you can file the tab holes a little. The trick is to get the anti rotation dowel hole perfect. Then the two 3mm screws just hold it at that perfect incdence. It's easy.
I have actually tweaked my stab incidence on my Yak using the above method so I have sort of done this. It's a piece of cake. You can use the epoxy and a round file as much as you want to re-tweak the hole location. You get lots of tries. The dowel should fit snug in the hole at 0 incidence.
I have actually tweaked my stab incidence on my Yak using the above method so I have sort of done this. It's a piece of cake. You can use the epoxy and a round file as much as you want to re-tweak the hole location. You get lots of tries. The dowel should fit snug in the hole at 0 incidence.
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RE: Extreme 88
Fancy popping over to do it?
On a serious note at least it looks like the dowel is in line with the old position so i should be able to just move the hole forward, ill double check it with the meter but should make things a little easier.
On a serious note at least it looks like the dowel is in line with the old position so i should be able to just move the hole forward, ill double check it with the meter but should make things a little easier.
#8
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RE: Extreme 88
Yeah man I'll be right over !! I'd help you if I lived near by, trust me. That's a fine airplane you got there. I love mine. Can't wait to fly it all summer.
Trust me you can do this. You get to fix those anti-rotation holes as much as you want with a round file and epoxy. It's not a one shot chance to get it right. When you're all done you'll be amazed how easy it is. I think the hardest part is reaching in to push in the blind nuts. You could just buy some new 3mm ones and leave the old ones in there. Less work, a few more grams tail weight. [8D]
Trust me you can do this. You get to fix those anti-rotation holes as much as you want with a round file and epoxy. It's not a one shot chance to get it right. When you're all done you'll be amazed how easy it is. I think the hardest part is reaching in to push in the blind nuts. You could just buy some new 3mm ones and leave the old ones in there. Less work, a few more grams tail weight. [8D]
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RE: Extreme 88
ORIGINAL: madfreestyler
Thanks for the reply,
Looks like the distance between the holes is 80mm on the fuselage, do you know if that makes it the older or newer one?
Dont suppose you know if the stab with 80mm gap can still be sourced?
Thanks in advance
Thanks for the reply,
Looks like the distance between the holes is 80mm on the fuselage, do you know if that makes it the older or newer one?
Dont suppose you know if the stab with 80mm gap can still be sourced?
Thanks in advance
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RE: Extreme 88
Hey Joe,
Can the canopy base be used as the datum? I was looking at the stab and as the tube and the rear retainer still fit and the incidence is right then i can use them to keep the stab aligned. I guess if i set the canopy base to 0 and the tail is 0 that answers my question. As default should the stab and wing = 0?
Can the canopy base be used as the datum? I was looking at the stab and as the tube and the rear retainer still fit and the incidence is right then i can use them to keep the stab aligned. I guess if i set the canopy base to 0 and the tail is 0 that answers my question. As default should the stab and wing = 0?
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RE: Extreme 88
Well i just checked the following
Stab tube hole and locator peg seem to be centre of the stab cord. On my bench = -2 also checked canopy base -2 centreline of wingtube and locator -2 and top of the engine box -2 so i guess if i just move the locator peg and front pin fwd on the same datum job is done :-)
Stab tube hole and locator peg seem to be centre of the stab cord. On my bench = -2 also checked canopy base -2 centreline of wingtube and locator -2 and top of the engine box -2 so i guess if i just move the locator peg and front pin fwd on the same datum job is done :-)
#13
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RE: Extreme 88
Hey Joe,
Good idea on the epoxy filling method for adjusting incidences on the anti-rotation pins. I was wondering how the heck I could fill the holes slightly and file to get them exact and never really thought of the epoxy filling trick. Thanks for the tip.
BTW OP, I wouldn't worry about the screws being off. Quite a few ARF's I've seen/read about have this issue. Because they don't set your incidence (assuming your anti-rotation pins are really tight and incidence is solid), just redrill em as needed. Doing what Joe suggests is the best method if you want a really solid hole, but they're really just there to hold the stab on; not for AOA.
Looks like a nice plane dude!
Good idea on the epoxy filling method for adjusting incidences on the anti-rotation pins. I was wondering how the heck I could fill the holes slightly and file to get them exact and never really thought of the epoxy filling trick. Thanks for the tip.
BTW OP, I wouldn't worry about the screws being off. Quite a few ARF's I've seen/read about have this issue. Because they don't set your incidence (assuming your anti-rotation pins are really tight and incidence is solid), just redrill em as needed. Doing what Joe suggests is the best method if you want a really solid hole, but they're really just there to hold the stab on; not for AOA.
Looks like a nice plane dude!
#14
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RE: Extreme 88
ORIGINAL: madfreestyler
Well i just checked the following
Stab tube hole and locator peg seem to be centre of the stab cord. On my bench = -2 also checked canopy base -2 centreline of wingtube and locator -2 and top of the engine box -2 so i guess if i just move the locator peg and front pin fwd on the same datum job is done :-)
Well i just checked the following
Stab tube hole and locator peg seem to be centre of the stab cord. On my bench = -2 also checked canopy base -2 centreline of wingtube and locator -2 and top of the engine box -2 so i guess if i just move the locator peg and front pin fwd on the same datum job is done :-)
#15
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RE: Extreme 88
ORIGINAL: Eganwp
Hey Joe,
Good idea on the epoxy filling method for adjusting incidences on the anti-rotation pins. I was wondering how the heck I could fill the holes slightly and file to get them exact and never really thought of the epoxy filling trick. Thanks for the tip.
BTW OP, I wouldn't worry about the screws being off. Quite a few ARF's I've seen/read about have this issue. Because they don't set your incidence (assuming your anti-rotation pins are really tight and incidence is solid), just redrill em as needed. Doing what Joe suggests is the best method if you want a really solid hole, but they're really just there to hold the stab on; not for AOA.
Looks like a nice plane dude!
Hey Joe,
Good idea on the epoxy filling method for adjusting incidences on the anti-rotation pins. I was wondering how the heck I could fill the holes slightly and file to get them exact and never really thought of the epoxy filling trick. Thanks for the tip.
BTW OP, I wouldn't worry about the screws being off. Quite a few ARF's I've seen/read about have this issue. Because they don't set your incidence (assuming your anti-rotation pins are really tight and incidence is solid), just redrill em as needed. Doing what Joe suggests is the best method if you want a really solid hole, but they're really just there to hold the stab on; not for AOA.
Looks like a nice plane dude!
And you're right. Only the anti-rot dowel determines the incidence. The (2)x3mm screws just hold it from sliding off the stab tube. I just made sure those tabs were open enough so the 2 screws didn't change the incidence when you tighten them down. If the tab slots are open enough they won't.
Hey madfreestyler are you done yet? Just giving you crap dude. Get 'er done !!!
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RE: Extreme 88
Hey Guys,
Just started to do the mod. Was holding out on a reply hoping that either EF on one of their dealers would be able to help but have drawn a blank, bit dissapointing really...................... anyway any tips on removing the blind nut? Ive managed to do the first anti rotation hole and got the incidence bang on, only problem is that it looks like the blind nut for the retainer has been glued in. I tried to remove it but the doubler as start to split so im a bit stuck. Any suggestions?
Just started to do the mod. Was holding out on a reply hoping that either EF on one of their dealers would be able to help but have drawn a blank, bit dissapointing really...................... anyway any tips on removing the blind nut? Ive managed to do the first anti rotation hole and got the incidence bang on, only problem is that it looks like the blind nut for the retainer has been glued in. I tried to remove it but the doubler as start to split so im a bit stuck. Any suggestions?
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RE: Extreme 88
Why do yo need to remove the blind nuts? Once the alignment dowel/hole is set for the proper incidence the holes in the stab should be opened up if needed to get the retaining bolts installed. As JoeAP noted above those bolts are used to secure the stab halves. Hope this helps.
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RE: Extreme 88
There are 2 stab retainers. The foremost is directly below the new anti rotation pin position so holes are required for both. Ive done the ar pin hole but i want the 2 retainers as per original config. Without removing the original position blind nut you cant fit a new one for the new position hence need to remove so i can get the new one in. (this isnt an incidence problem this is that the stab i have doesnt fit the fuse see original post).
#19
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RE: Extreme 88
The easiest way to remove those blind nuts is to heat them up and push them out. The glue releases with heat. Do you have a soldering iron with a fine tip? Just put the tip inside the blind nut threads and push lightly. The nut should just push out as it heats up. I've done this many times and it's so easy it's fun.
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RE: Extreme 88
Sorry about that. The heat will work great. If they are flared on the ends you may have to get a sightly longer bolt and wiggle to loosen them up as well. I just had to do this.
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RE: Extreme 88
Like the tip guys, gonna give it a go today. A mate also suggested making a new false root but i think the heat trick is a much easier option. Will report my findings shortly. Weather not so good here typical british weather so its most definitely hangar time :-)
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RE: Extreme 88
No kidding took 60 seconds for both job done nuts are removed. Glad im going through this process as the original left hand side is 1.5 degrees out from the right.
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RE: Extreme 88
And now for the next problem :-(. Theres a 5mm gap at the root near the trailing edge. The front of the wing is flush but im not sure if it can be flown like this. Have attached a pic, any thoughts?