Build Log - Mc Clain Wing Cores 48" virgin foam and EPP flying wing - Kelly's and Spray 77 finish!
10-16-2008, 10:14 AM
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Build Log - Mc Clain Wing Cores 48" virgin foam and EPP flying wing - Kelly's and Spray 77 finish!
Hey folks,
We are back with another building thread of the McClain MCW 48" flying wing!
This wing can be purchased from http://www.mwcores.com/servlet/StoreFront
Video of the maiden flight!
http://www.rcgroups.com/forums/show...80#post10729844
Jeff has been cutting cores for a long time. I first became aware of his stuff a few years ago when a friend purchased a set of cores for a Mosquito bomber from his ebay store. The cores were right on the money and the plane was just phenomenal.
The wings from MCW are no different. I have built the 24" and the 36" wings and I can say that they were dead on the first time, no funky twists, no funky CG issues wich are very common with flying wings from other mfgs!
The planes all worked with the stated CG from MC Wings and the design flew so well that they are now both my favorites and fly in all kinds of wind!
I am referencing the other threads for your edification.[INDENT]24" building thread
http://www.rcgroups.com/forums/show...ghlight=24+wing
36" wing building thread
http://www.rcgroups.com/forums/showthread.php?t=844426
Starfire Building thread:
http://www.rcgroups.com/forums/show...t=895053&page=2
The plan is to start this build next week when I have some time off again, I just got them today and was impressed by the quality of the cutting as well as the quality of the foam.
PLEASE PLEASE PLEASE POST QUESTIONS:
I get PMs and email constantly about the build threads, esp. in so far as powering these planes.
Please post your question in the thread so that everyone can benefit from the response. Nothing is better than having everything in one place for future reference.
thanks
We are back with another building thread of the McClain MCW 48" flying wing!
This wing can be purchased from http://www.mwcores.com/servlet/StoreFront
Video of the maiden flight!
http://www.rcgroups.com/forums/show...80#post10729844
Jeff has been cutting cores for a long time. I first became aware of his stuff a few years ago when a friend purchased a set of cores for a Mosquito bomber from his ebay store. The cores were right on the money and the plane was just phenomenal.
The wings from MCW are no different. I have built the 24" and the 36" wings and I can say that they were dead on the first time, no funky twists, no funky CG issues wich are very common with flying wings from other mfgs!
The planes all worked with the stated CG from MC Wings and the design flew so well that they are now both my favorites and fly in all kinds of wind!
I am referencing the other threads for your edification.[INDENT]24" building thread
http://www.rcgroups.com/forums/show...ghlight=24+wing
36" wing building thread
http://www.rcgroups.com/forums/showthread.php?t=844426
Starfire Building thread:
http://www.rcgroups.com/forums/show...t=895053&page=2
The plan is to start this build next week when I have some time off again, I just got them today and was impressed by the quality of the cutting as well as the quality of the foam.
PLEASE PLEASE PLEASE POST QUESTIONS:
I get PMs and email constantly about the build threads, esp. in so far as powering these planes.
Please post your question in the thread so that everyone can benefit from the response. Nothing is better than having everything in one place for future reference.
thanks
10-16-2008, 10:15 AM
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RE: Build Log - Mc Clain Wing Cores 48" virgin foam and EPP flying wing - Kelly's and Spray 77 finish!
Basics of the plane and updates
Hey guys
These are the basic specs from McClain:
MWC 48" Flying Wing
SKU: MWC48FW
48" Wing
Wing area is 216 sq.in.
CG is 6-15/16 to 7-3/8 from the L.E.
The cores are ready cut of elevons
The cores are made of virgin white bead foam with a EPP L.E.
Here is how I plan on equipping this model:
DonsRC.com Wicked 2700KV 450 outrunner
http://www.donsrc.com/cart/index.ph...od&productId=12
New version of the "Wicked" Brushless motor with a true 2700 KV. This is a great motor at a great price and offers more prop selection than the original 3000 KV version. For the original "Don's Wicked motor" see the specs here.
This true 2700 KV verison of the motor allows a wider prop selection on 3S and on 4S.
Specifications:
KV: 2700 rpm/volt
Weight: 69 grams
Battery: 34 cell lipo
Shaft size: 1/8" (3.17mm)
Now includes 'X' mount and mounting screws!
Requires a 1/8" collet adapter which can be bought here.
Here are test results from the new batch , all data with APC props:
3S lipo:
Prop RPM Amps Watts Pitch Speed
4.7 x 4.2 24500 rpm 23 amps 240 watts 97 mph
4.7 x 4.7 23000 rpm 27 amps 280 watts 102 mph
5 x 5 22000 rpm 30 amps 310 watts 104 mph
5.2 x 4.7 22000 rpm 29 amps 290 watts 98 mph
5.2 x 6.2 20500 rpm 34 amps 350 watts 120 mph
5.5 x 4.5 21500 rpm 32 amps 320 watts 92 mph
6 x 4 21000 rpm 33amps 340 watts 80 mph
4S2250 Long Max lipo
Prop RPM Amps Watts Pitch Speed
4.1 x 4.1 34000 rpm 28 amps 402 watts 132 mph
4.5 x 4.1 33000 rpm 34 amps 500 watts 128 mph
tower pro 9g servos from Lightflightrc.com
• 8.5g Micro Servo
• Compact 22x12x29mm, 0.87 x 0.47 x 1.14"
• .11 sec 60deg @ 4.8V
• Torque @ 4.8V = 1.6kg/cm, 22.2oz/in
SP 30 Amp ESC from lightflightrc.com
• Compact 30 amp Brushless ESC
• 3 amp B
Battery will be a 3s 2200 from loongmax but I will be cutting the hole to accommodate up to a 3000mah 4s pack.
elevons will be from 1" balsa
Elevon control horns 1/2a control horns (small) from Dubro
Pushrods will be 1/16" wire with z bends
hatch covers will be cloroplast sheet 1/8" thick
winglets will be 1/8" lite ply
Covering has not been decided yet....currently looking at econo-coat black on the bottom and yellow or red on the top...
After much deliberation regarding options and the absolute incredible versitility that I see in this design in so far as a cross platform model. I contacted eff at McClain and asked him what he thought of building it real light and set it up for slermaling or cross platform plane or transitional model between someone who has built and flown a wild wing or stryker and is just not ready for the likes of a Rite wing yet. A versatile transition plane that will handle the same flight pack from your wild wing or stryker yet offers the ability to throw it off a cliff or hill and slope it all day with the same set up . . . . or climb it up high and thermal the crud out of it.
One of the most basic and inexpensive power options available is the power combo offered by Hobby city ( http://www.hobbycity.com/hobbycity/..._9x6_Prop_Combo ) or rchotdeals.com ( http://www.rchotdeals.com/Products/...ype2408-21.html )
These power systems offer low draw and high output on a budget.....most of all, they are light and can be mixed with a folding prop easily to reduce drag once the motor run is finished.
* Weight:1.77oz (Including the Aluminum mount)
* Size:30(Dia)X27(L) mm
* Output Axis:M3
* Max Current:14A
* BATTERY: 2-3LIPO (7.2V-12.6V)
* KV:1750
* PROPELLER: 3LIPO 8X4;
Direct Drive
8040
11.1V
13.1A
600 grams/ 21.0 oz
This motor is available under a whole bunch of names and outlets and varies in price from as low as 9.00 to 21.00. A simple 18A to 25A esc will do fine but I have a spare 30a I will be using on this project as I already picked it up for the build.
Hey guys
These are the basic specs from McClain:
MWC 48" Flying Wing
SKU: MWC48FW
48" Wing
Wing area is 216 sq.in.
CG is 6-15/16 to 7-3/8 from the L.E.
The cores are ready cut of elevons
The cores are made of virgin white bead foam with a EPP L.E.
Here is how I plan on equipping this model:
DonsRC.com Wicked 2700KV 450 outrunner
http://www.donsrc.com/cart/index.ph...od&productId=12
New version of the "Wicked" Brushless motor with a true 2700 KV. This is a great motor at a great price and offers more prop selection than the original 3000 KV version. For the original "Don's Wicked motor" see the specs here.
This true 2700 KV verison of the motor allows a wider prop selection on 3S and on 4S.
Specifications:
KV: 2700 rpm/volt
Weight: 69 grams
Battery: 34 cell lipo
Shaft size: 1/8" (3.17mm)
Now includes 'X' mount and mounting screws!
Requires a 1/8" collet adapter which can be bought here.
Here are test results from the new batch , all data with APC props:
3S lipo:
Prop RPM Amps Watts Pitch Speed
4.7 x 4.2 24500 rpm 23 amps 240 watts 97 mph
4.7 x 4.7 23000 rpm 27 amps 280 watts 102 mph
5 x 5 22000 rpm 30 amps 310 watts 104 mph
5.2 x 4.7 22000 rpm 29 amps 290 watts 98 mph
5.2 x 6.2 20500 rpm 34 amps 350 watts 120 mph
5.5 x 4.5 21500 rpm 32 amps 320 watts 92 mph
6 x 4 21000 rpm 33amps 340 watts 80 mph
4S2250 Long Max lipo
Prop RPM Amps Watts Pitch Speed
4.1 x 4.1 34000 rpm 28 amps 402 watts 132 mph
4.5 x 4.1 33000 rpm 34 amps 500 watts 128 mph
tower pro 9g servos from Lightflightrc.com
• 8.5g Micro Servo
• Compact 22x12x29mm, 0.87 x 0.47 x 1.14"
• .11 sec 60deg @ 4.8V
• Torque @ 4.8V = 1.6kg/cm, 22.2oz/in
SP 30 Amp ESC from lightflightrc.com
• Compact 30 amp Brushless ESC
• 3 amp B
Battery will be a 3s 2200 from loongmax but I will be cutting the hole to accommodate up to a 3000mah 4s pack.
elevons will be from 1" balsa
Elevon control horns 1/2a control horns (small) from Dubro
Pushrods will be 1/16" wire with z bends
hatch covers will be cloroplast sheet 1/8" thick
winglets will be 1/8" lite ply
Covering has not been decided yet....currently looking at econo-coat black on the bottom and yellow or red on the top...
After much deliberation regarding options and the absolute incredible versitility that I see in this design in so far as a cross platform model. I contacted eff at McClain and asked him what he thought of building it real light and set it up for slermaling or cross platform plane or transitional model between someone who has built and flown a wild wing or stryker and is just not ready for the likes of a Rite wing yet. A versatile transition plane that will handle the same flight pack from your wild wing or stryker yet offers the ability to throw it off a cliff or hill and slope it all day with the same set up . . . . or climb it up high and thermal the crud out of it.
One of the most basic and inexpensive power options available is the power combo offered by Hobby city ( http://www.hobbycity.com/hobbycity/..._9x6_Prop_Combo ) or rchotdeals.com ( http://www.rchotdeals.com/Products/...ype2408-21.html )
These power systems offer low draw and high output on a budget.....most of all, they are light and can be mixed with a folding prop easily to reduce drag once the motor run is finished.
* Weight:1.77oz (Including the Aluminum mount)
* Size:30(Dia)X27(L) mm
* Output Axis:M3
* Max Current:14A
* BATTERY: 2-3LIPO (7.2V-12.6V)
* KV:1750
* PROPELLER: 3LIPO 8X4;
Direct Drive
8040
11.1V
13.1A
600 grams/ 21.0 oz
This motor is available under a whole bunch of names and outlets and varies in price from as low as 9.00 to 21.00. A simple 18A to 25A esc will do fine but I have a spare 30a I will be using on this project as I already picked it up for the build.
10-16-2008, 10:17 AM
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RE: Build Log - Mc Clain Wing Cores 48" virgin foam and EPP flying wing - Kelly's and Spray 77 finish!
out of the box
here are some pics of the cores and leading edges out if the box
notice the marking that MCW places on the leading edges to make sure you set them up with the proper halves AND with the proper ends together!
Great quality materials and cutting. .
here are some pics of the cores and leading edges out if the box
notice the marking that MCW places on the leading edges to make sure you set them up with the proper halves AND with the proper ends together!
Great quality materials and cutting. .
10-16-2008, 10:19 AM
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RE: Build Log - Mc Clain Wing Cores 48" virgin foam and EPP flying wing - Kelly's and Spray 77 finish!
why the two piece cores and why the different foam??
Well, it is a legitimate question, why would you add so much work to cutting the kit or building when there is epp only???
what the heck does all this added work do for me??
In general, virgin white foam is far more rigid than EPP, it keeps it's airfoil better, keeps the model truer and is a heck of a lot easier to cut than EPP.
It is also very easy to cut, melt, shape . . . . .far more so than epp.....
It is a better material in general for building, however, it does not do well when you bang into something - like a tree or a post or a rock on the ground.
It does not do well with impact as it tends to shatter with the application of blunt force.
EPP on the other hand is much spongier than Virgin foam and takes a hit incredibly well seemingly without any damage . . .it is the ultimate "bumper" but waves like a wet noodle unless it is reinforced with resin, cloth and lots of carbon!
For airplanes that are clothed and glassed and carboned up the wazoo, the epp only makes a lot of sense. like a surf board, they take a likkin and keep on tickin!
For a sport type model, that level of bullet proofing just doesnt make sense . . . so you take the best of both worlds, the rigidness of the Virgin Foam for the main part of the core and the impact resistance of the EPP for the leading edge to get the best compromise of durability and rigidity to provide a fantastic model!
At first I was skeptical, but I have put a 36" and the 24" MCW through hell and can say from experience that Jeff has managed to get the compromise between ruggedness and durability right on the money.
I flew the 24" into a tree at full bore and it bounced like a pin ball through the trees around the one I hit and came out the bottom unscathed . . . .I broke a prop . .. ..
I believe that the 48" wing will offer all the upside of the 36" but with a little more wingloading to allow it to slow down even more for landing and make it easier to see at altitude!
Well, it is a legitimate question, why would you add so much work to cutting the kit or building when there is epp only???
what the heck does all this added work do for me??
In general, virgin white foam is far more rigid than EPP, it keeps it's airfoil better, keeps the model truer and is a heck of a lot easier to cut than EPP.
It is also very easy to cut, melt, shape . . . . .far more so than epp.....
It is a better material in general for building, however, it does not do well when you bang into something - like a tree or a post or a rock on the ground.
It does not do well with impact as it tends to shatter with the application of blunt force.
EPP on the other hand is much spongier than Virgin foam and takes a hit incredibly well seemingly without any damage . . .it is the ultimate "bumper" but waves like a wet noodle unless it is reinforced with resin, cloth and lots of carbon!
For airplanes that are clothed and glassed and carboned up the wazoo, the epp only makes a lot of sense. like a surf board, they take a likkin and keep on tickin!
For a sport type model, that level of bullet proofing just doesnt make sense . . . so you take the best of both worlds, the rigidness of the Virgin Foam for the main part of the core and the impact resistance of the EPP for the leading edge to get the best compromise of durability and rigidity to provide a fantastic model!
At first I was skeptical, but I have put a 36" and the 24" MCW through hell and can say from experience that Jeff has managed to get the compromise between ruggedness and durability right on the money.
I flew the 24" into a tree at full bore and it bounced like a pin ball through the trees around the one I hit and came out the bottom unscathed . . . .I broke a prop . .. ..
I believe that the 48" wing will offer all the upside of the 36" but with a little more wingloading to allow it to slow down even more for landing and make it easier to see at altitude!
