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Old Mar 04, 2010, 11:53 AM
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feefo's Avatar
Staffs, UK
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Originally Posted by donaldrtaylor View Post
here they are:
Looks kike there's LOADS of room
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Old Mar 04, 2010, 04:00 PM
Austin, TX, 78746
Joined Nov 2008
292 Posts
Quote:
Originally Posted by ministeve2003 View Post
I was wondering what you guys think about my idea of permenently joining the wing halves with expoy, then once the servo extensions are run, dripping gorilla glue inside to join/fill the whole center section togeather?...

I've actually done this before with an ebt trainer from 3dhobbyshop and it's worked out great.... (my first ebt broke the wings inhalf prior)

also, what are you guys doing to mount the motors, do you drill the metal plate, and are you reinforcing the nose area?

Thanks for the info...

SK

I just got mine yesterday, so I am still considering mod options but I am going to do something like your gorilla glue idea. I have test fitted a small (about 3/8 inch) carbon spar thru the wing "following the path of the wing servo wires". I can easily get it all the way to the wing servo bay without damaging anything. So I think after i get all the wires run thru the wing I will squirt the inside with water Slather up the carbon rod and install it. The gorilla glue will expand and make a tight fit. This spar will be a single piece going thru both wings from left aileron servo bay thru the middle of the wing root and all the way to the right wing aileron bay.
I will post some pictures sometime this week of this process. the hard part will be aligment. and getting everything ready to glue at once, since the wing halves will have to be glued and joined at the same time.
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Old Mar 04, 2010, 05:06 PM
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Las Cruces, New Mexico, United States
Joined Jun 2002
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30 minute epoxy is your friend!
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Old Mar 04, 2010, 09:02 PM
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Originally Posted by JimNM View Post
30 minute epoxy is your friend!
Yeah +1 on the epoxy.

Have had the Gorilla glue expand tooooo much and puff out the wing I was gluing. If on the outside of the wing like a wing joiner imbedded in foam or something then it's no problemo, just sand down, but inside the wing halves is a different story.
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Old Mar 04, 2010, 09:41 PM
Austin, TX, 78746
Joined Nov 2008
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Originally Posted by Rondog View Post
Yeah +1 on the epoxy.

Have had the Gorilla glue expand tooooo much and puff out the wing I was gluing. If on the outside of the wing like a wing joiner imbedded in foam or something then it's no problemo, just sand down, but inside the wing halves is a different story.
Thanks for the heads up Epoxy it is
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Old Mar 05, 2010, 02:04 PM
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Las Cruces, New Mexico, United States
Joined Jun 2002
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Maiden flight = flawless !!! There is not a single thing that I need or want to change. The 10x6 gives good speed, whistles nicely on level and shallow climb.

I used no spoilers or aileron differential. No drama at all

Fly, be happy
JimNM
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Old Mar 05, 2010, 02:50 PM
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Jim,

Any reinforcement of the spar / wing joiner area ??

Old_dude
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Old Mar 05, 2010, 04:57 PM
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Las Cruces, New Mexico, United States
Joined Jun 2002
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Robert - I did nothing to strengthen the wing. I epoxied the wing joint and the 6mm joiner and the 3mm anti-rotation pin. I upped the prop to a 10x8 and there was a noticable jump in speed.

Mr. Yablonski - I owe you a double serving of "you told me so" and a side order of crow. I caught a wing tip on the 4th flight at landing and the fuse sheared at the hold down. I did not get a straight or complete break across the fuse. It will be fixed and it will fly again. It's too mich fun to walk away from.

Again, Mr Yablonsky's assessment of a stress riser neaer the rear vent is worth taking another look at that location.

Fly, be happy
JimNM
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Old Mar 05, 2010, 05:35 PM
Austin, TX, 78746
Joined Nov 2008
292 Posts
Congrats Jim on the Sucessful flight.

Jim,

From your report it looks like you really enjoyed the plane. I am trying to reinforce that area of the fuse behind the wing bolts. It is hard to get to from the inside. To start with I put an extra piece of plywood underneath the piece that has the wing bolt holes but I fear the break occurs behind this spot and this might not help. what do you think?
Let me know how you address the problem. I am reinforcing both the wing and the fuse, so my build will go slow. Keep up your enthusiam Jim. Your a pioneer on this bird and your first flight report makes me think that with a few minor upgrades the Alps can be a great flyer.

Don
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Old Mar 05, 2010, 06:05 PM
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Las Cruces, New Mexico, United States
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Thanks Don. I think a thin layer of balsa and CA will do wonders for the fuse. Caught a wing tip which started the rotation. Then the nose hit which stopped the rotation, allowing the fuse to twist from the momentum of the tail and shear at the hold downs. At 400 watts the ALPS is a decent warmliner. I think 700w will be quite silly.

If I have to, I will buy another kit. I had too much fun to not keep it going . It may be a week or so before I can take the time - keep the faith

Jim
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Old Mar 06, 2010, 12:14 AM
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How about epoxying some 2oz. glass cloth in that area inside the fuse?

BTW, why not rip out all that wood inside the fuse?

What is it for? Glass and one or two strategically placed bulkheads would make for a much nicer setup.
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Old Mar 06, 2010, 03:06 PM
Austin, TX, 78746
Joined Nov 2008
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Quote:
Originally Posted by Rondog View Post
How about epoxying some 2oz. glass cloth in that area inside the fuse?

BTW, why not rip out all that wood inside the fuse?

What is it for? Glass and one or two strategically placed bulkheads would make for a much nicer setup.
Hi Ron,
I did just as you suggested. I ripped out most of the wood inside and added glass, some carbon rods and two cross braces. ( the braces are not glued yet so they look crooked). This added a lot of strength that area.
The side walls of the fuse about 1 inch in front of the rear mounting bolts is very flimsy. I wonder if thats where the tearing started on Jim's and Yablonsky's.
Not very pretty but very strong. it will also add a little weight. I put a flat paint stick from the mount for the elevator servo all the way to the front of where my inrunner will sit. I will use this stick to mount velcro for the battery and as a wedge to give extra support to my motor. Here are a couple of pics.
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Old Mar 06, 2010, 03:15 PM
Austin, TX, 78746
Joined Nov 2008
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looking down the to the nose

Here is another view. I also added plywood beneath the front wing mount as well as beneath the rear wing mount
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Last edited by donaldrtaylor; Mar 06, 2010 at 03:24 PM. Reason: added detail
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Old Mar 06, 2010, 09:07 PM
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Hi Don,

Great work! It does not look bad at all, plus you won't notice much when the wing is back on. Weight, yes it'll weigh a little more but be prepared to experiance more energy retention and flat speed after coming out of a dive!

It's really looking great and with the overpowered setup as it is I think you are going to feel as if it is an entirely different plane. After a few flights you might start playing with a few different pitch props, if the wing can handle it.

Be careful where you put the saddle cross-connectors to make sure the battery fits easily, and also check the wing fits alright with no obstruction. Check cg again.

Dang I wish I was in your area. I'd love to watch this baby shoot for the sky and the return trip! I love this stuff! I think that baby is going to rip!
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Old Mar 08, 2010, 01:28 PM
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Aliso Viejo, CA
Joined Sep 2009
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Can you post what motor you put in yours and where to get it?

I really went way to small on the motor. I have a spare motor out of my Parkzone T-28 trojan I was thinking about using, but not sure if it's strong enough. I'd really like to get an inrunner from Hobbyking, but not sure what to get.

Thanks

Ken
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