Allure by Bryan Hebert
05-21-2016, 03:02 AM
#527
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Anti-rotation pins cut and fitted. Not glued in yet. Will do that after skinning. The pins are 8mm OD carbon tube 30mm long. Used a bit of 12mm ply with an 8mm hole in it to help hold the carbon whilst cutting with the Dremel. Also helps to keep the tube cuts square. A reamer was used to open the holes out to 8mm.
I added some 1/4" balsa to the back of the root rib for a bit of extra gluing area.
Cheers,
Jason.
I added some 1/4" balsa to the back of the root rib for a bit of extra gluing area.
Cheers,
Jason.
does the file include the crutches that the laser cutter cuts?
Hopefully Bryan will send me the cad file soon. I have a cutter lined up.
05-21-2016, 01:14 PM
#529
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The wing looks like it went together well. Less lightening holes than I would have thought so I'm curious as to its weight at this stage before the sheets.
does the file include the crutches that the laser cutter cuts?
Hopefully Bryan will send me the cad file soon. I have a cutter lined up.
does the file include the crutches that the laser cutter cuts?
Hopefully Bryan will send me the cad file soon. I have a cutter lined up.
Yes, the jig is part of each rib and has small break out tabs to separate the frame from the jig.
Should get the frame separated today and will than have a weight.
Cheers,
Jason.
05-21-2016, 02:14 PM
#530
Senior Member
just a thought, wing and stab sockets supplied with the carbon tubes are heavy. I make my own from glassed 1/32" balsa and some carbon toe. Compare 11.8 grams for supplied glass stab sockets vs. 2.5 for the balsa. In addition, I get to build just the right fit.
05-21-2016, 03:02 PM
#531
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Man laser cutting sure makes it simple. The first time I built a wing using crutches was back in the 70s. Had to cut each crutch by hand, a royal PITA. The plane was the Hal DeBolt designed Solution, a 40 sized pattern model, a fine flier. Remember it fondly but also remember thinking the build was never ending.
just a thought, wing and stab sockets supplied with the carbon tubes are heavy. I make my own from glassed 1/32" balsa and some carbon toe. Compare 11.8 grams for supplied glass stab sockets vs. 2.5 for the balsa. In addition, I get to build just the right fit.
just a thought, wing and stab sockets supplied with the carbon tubes are heavy. I make my own from glassed 1/32" balsa and some carbon toe. Compare 11.8 grams for supplied glass stab sockets vs. 2.5 for the balsa. In addition, I get to build just the right fit.
Yes, laser cutting makes it a breeze to put together. Too late for me to make my own sockets now. ;-)
Have just cut one frame from the jig 120 grams. Skins are currently 58 grams each un-sanded. These are 2.5mm skins.
Cheers,
Jason.
05-28-2016, 01:14 AM
#533
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Today I sorted out the wing retention system. I've gone with the standard M6 nylon bolt. Used a bit more carbon tube to bring the root rib hole down to 6mm. Also added an extra hole so the bolt can be glued in after skinning. This makes it much easier to sand the root rib.
A couple of the spars needed a bit more material (1/32") on the bottom side of the wing. This will be corrected in future kits. All bottom spars are yet to be sanded down flush with the ribs.
The skins have all been sanded now. The average weight before sanding was 58 grams per skin and after sanding is now 52.5 grams.
Cheers,
Jason.
A couple of the spars needed a bit more material (1/32") on the bottom side of the wing. This will be corrected in future kits. All bottom spars are yet to be sanded down flush with the ribs.
The skins have all been sanded now. The average weight before sanding was 58 grams per skin and after sanding is now 52.5 grams.
Cheers,
Jason.
05-28-2016, 01:47 AM
#534
Senior Member
Jason,
Which carbon tube kit is the wing designed around? Is it the Gator or PBG or other?
It's looking nice, good job....weight should be around 250-260 grams after the facings are on, ready to cover. Around 325grams ready for equipment. A couple ounces lighter than the average composite version. A considerable difference.
Bryan sent me the files too. I should get it to the laser cutter promptly and hopefully, if the cutter delivers as planned, get a build of my own going.
Which carbon tube kit is the wing designed around? Is it the Gator or PBG or other?
It's looking nice, good job....weight should be around 250-260 grams after the facings are on, ready to cover. Around 325grams ready for equipment. A couple ounces lighter than the average composite version. A considerable difference.
Bryan sent me the files too. I should get it to the laser cutter promptly and hopefully, if the cutter delivers as planned, get a build of my own going.
05-28-2016, 02:01 AM
#535
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Thanks Matt,
The carbon tubes and sockets come from Xtreme Composite as part of the Allure builders kit. A PBG version would probably be lighter based on my previous experience with them.
With any luck I'll get the skins onto the first wing tomorrow.
Cheers,
Jason.
The carbon tubes and sockets come from Xtreme Composite as part of the Allure builders kit. A PBG version would probably be lighter based on my previous experience with them.
With any luck I'll get the skins onto the first wing tomorrow.
Cheers,
Jason.
05-28-2016, 03:51 AM
#536
Senior Member
Duh.....that makes sense. The carbon supplied from Xtreme is thicker walled and considerably heavier and stronger. I saw on the cad file one ply sub rib at the far end of the tube. The actual end of the carbon should go beyond that point for best wing/fuse joint strength. If it stops short, the carbon may not have adequate support. It's probably fine but that would be a small mod I'd make.
Also, before sheeting, let me suggest to add a thin strip of balsa at the LE and TE and shape it to the right contour, assuming the intent is to glue the LE or TE on after. If you intend to glue and shape these before the sheeting, even better. After you sheet, there will be no seam to fill.
Either way, Sheeting sag should be reduced substantially there. The thick sheeting helps; just added insurance which eases sanding and shaping.
Also, before sheeting, let me suggest to add a thin strip of balsa at the LE and TE and shape it to the right contour, assuming the intent is to glue the LE or TE on after. If you intend to glue and shape these before the sheeting, even better. After you sheet, there will be no seam to fill.
Either way, Sheeting sag should be reduced substantially there. The thick sheeting helps; just added insurance which eases sanding and shaping.
Last edited by MTK; 05-28-2016 at 04:04 AM.
05-31-2016, 02:08 PM
#538
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One wing frame is fully prepared ready for skinning. Don't forget to add the two 1/4" balsa gussets (included in laser parts) to the front of the tip rib. You'll need to sand the top and bottom to match the tip rib profile prior to skinning. Once the tips are fitted this gusset will be sanded to final shape. You actually sand into the wing a little here.
06-01-2016, 11:36 PM
#539
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Time for a little plug...
Richard Hirst of Melange Technical Sercices (MTS) is making some Plettenberg Advance Carbon Mount kits. This is the same as that used by Hamish Galloway in his Allure builders kit http://www.precisionaeroproducts.com...motor-mounting
The kit is very well engineered and manufactured. The kit includes the front carbon plate and also the rear support which plugs onto the back of the Advance.
Cheers,
Jason.
Richard Hirst of Melange Technical Sercices (MTS) is making some Plettenberg Advance Carbon Mount kits. This is the same as that used by Hamish Galloway in his Allure builders kit http://www.precisionaeroproducts.com...motor-mounting
The kit is very well engineered and manufactured. The kit includes the front carbon plate and also the rear support which plugs onto the back of the Advance.
Cheers,
Jason.
06-04-2016, 04:11 AM
#541
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06-08-2016, 09:07 AM
#544
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Finally finished!!
Finally got my Allure done and test flown. This plane is absolutely the best flying plane I have ever had. Good job, Bryan!!
Next task is to install the FPV camera and get a few flights under my belt before the Nats.
Next task is to install the FPV camera and get a few flights under my belt before the Nats.
06-11-2016, 01:40 AM
#545
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The wing skins have now been razor planed and sanded flush to the ribs in preparation for the LE/TE. This task took 7 grams off which was a little surprising.
The LE/TE were then glued on with Alphatic resin and held in place with masking tape.
Only the aileron capping and tips to be added now.
Estimated weight is now 270 grams.
Cheers,
Jason.
The LE/TE were then glued on with Alphatic resin and held in place with masking tape.
Only the aileron capping and tips to be added now.
Estimated weight is now 270 grams.
Cheers,
Jason.
06-11-2016, 08:46 AM
#546
Senior Member
With plastic covering they should come in at 340 give or take. A decent weight,.
I'm actually building a set of wings and stabs from foam cores for one of our champs in the States. The foam was cut by Joe Dunnaway, doing a very good job with the cuts. The foam Joe used is stout but light enough, enabling my blue printing process. They too are coming out nice and light.
I'll post snaps when done.
I'm starting a small company offering building services to serious competitors, to help keep me busy in retirement. Contact me direct at [email protected]
I'm actually building a set of wings and stabs from foam cores for one of our champs in the States. The foam was cut by Joe Dunnaway, doing a very good job with the cuts. The foam Joe used is stout but light enough, enabling my blue printing process. They too are coming out nice and light.
I'll post snaps when done.
I'm starting a small company offering building services to serious competitors, to help keep me busy in retirement. Contact me direct at [email protected]
06-11-2016, 03:39 PM
#547
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With plastic covering they should come in at 340 give or take. A decent weight,.
I'm actually building a set of wings and stabs from foam cores for one of our champs in the States. The foam was cut by Joe Dunnaway, doing a very good job with the cuts. The foam Joe used is stout but light enough, enabling my blue printing process. They too are coming out nice and light.
I'll post snaps when done.
I'm starting a small company offering building services to serious competitors, to help keep me busy in retirement. Contact me direct at [email protected]
I'm actually building a set of wings and stabs from foam cores for one of our champs in the States. The foam was cut by Joe Dunnaway, doing a very good job with the cuts. The foam Joe used is stout but light enough, enabling my blue printing process. They too are coming out nice and light.
I'll post snaps when done.
I'm starting a small company offering building services to serious competitors, to help keep me busy in retirement. Contact me direct at [email protected]
This morning I sanded the tips of the wing panels flush to the tip rib. Wing tips are now glued on with Alphatic resin.
Once the glue has fully cured the tips LE/TE will be shaped and then the ailerons will be cut out, cleaned up and then faced with 1/4" balsa.
Cheers,
Jason.
06-12-2016, 04:20 PM
#549
Senior Member
Here are a couple of photos of the right panel in my vacuum press. This is the foam core I spoke about sheeted with 1.5 mm balsa. Epoxy from US Composites, #635, 24 hour laminating type. Inexpensive but strong enough for laying up landing gear.
I'm using just about 5" Hg vac, or roughly 1/6th atmosphere. Equivalent to putting more than half a ton of weight on the core. The sheeted core goes in the bag, not the whole foam block. I've done that in the past and it was just a pain.
Epoxy of choice and some of the tools of the trade....water and plate glass. I place the sheeted core and vacuum bag back in the husk to keep things flat
The socket is supported by 1/8" balsa sub spars which form an 'I' beam structure between the sheets. Strongest and lightest technique. The socket is only 10" long in this bird so sub spars extend out to 16". With servo cutout and aileron outside of the socket depth, the longer subspar eliminates any stress risers.
The hard points are full depth. Strong and light.
The vacuum system must have breather material on the sheeting to work properly. The breather in turn must have a path to the vac source. My breather is extremely high tech and beyond most modelers comprehension..... it's regular paper towels. But other things work well too like felt, even cotton sheets.
Edit... I forgot to mention that the stabs are completed and ready for the covering. I didn't have the fuse but did have a set of composite stabs to try to copy. I made room for the adjusters but final fit must be done on the fuse.
weight is pretty fair at slightly less than 2 ounces each but no covering yet. Wrinkle Kote should add maybe another 20 grams for each half.
I'm using just about 5" Hg vac, or roughly 1/6th atmosphere. Equivalent to putting more than half a ton of weight on the core. The sheeted core goes in the bag, not the whole foam block. I've done that in the past and it was just a pain.
Epoxy of choice and some of the tools of the trade....water and plate glass. I place the sheeted core and vacuum bag back in the husk to keep things flat
The socket is supported by 1/8" balsa sub spars which form an 'I' beam structure between the sheets. Strongest and lightest technique. The socket is only 10" long in this bird so sub spars extend out to 16". With servo cutout and aileron outside of the socket depth, the longer subspar eliminates any stress risers.
The hard points are full depth. Strong and light.
The vacuum system must have breather material on the sheeting to work properly. The breather in turn must have a path to the vac source. My breather is extremely high tech and beyond most modelers comprehension..... it's regular paper towels. But other things work well too like felt, even cotton sheets.
Edit... I forgot to mention that the stabs are completed and ready for the covering. I didn't have the fuse but did have a set of composite stabs to try to copy. I made room for the adjusters but final fit must be done on the fuse.
weight is pretty fair at slightly less than 2 ounces each but no covering yet. Wrinkle Kote should add maybe another 20 grams for each half.
Last edited by MTK; 06-12-2016 at 05:24 PM.
06-13-2016, 01:33 AM
#550
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Looking good Matt.
Chux Super Wipes make great breathers too.
I came out of retirement today for a fly. It was great. Expected to be very rusty but the model was on rails from the moment the mains left terra firma. It's been six months too. I forgot just how well this model flys...
Cheers,
Jason.
Chux Super Wipes make great breathers too.
I came out of retirement today for a fly. It was great. Expected to be very rusty but the model was on rails from the moment the mains left terra firma. It's been six months too. I forgot just how well this model flys...
Cheers,
Jason.