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Vailly Aviation Hawker Hurricane Build Thread

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Vailly Aviation Hawker Hurricane Build Thread

Old 05-10-2014, 08:01 AM
  #476  
DaddySam
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I've been on a self - imposed vacation from building, and now that it's almost flying season I decided I needed to get back to work. The canopy has been a tedious affair, which I was not expecting after the complexity of the Corsair canopy of my last build. I had installed a brass channel for the rail and was not happy with either the look or the fact that the canopy would not be captured by the rails and could fly off. So I used a soldering gun to melt the epoxy and pulled off the old channel, and made some new "C" rails with a Dremel router table I bought years ago, thinking that it would be cheaper to buy the router table than to buy slotted rails commercially. I'm getting there, just putting some finishing touches on the frame before I glue the windscreen in and paint the frame.
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Old 05-10-2014, 05:03 PM
  #477  
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Hi i am glad this has come to life again.
On building a new wing for Stans aircraft i found the wing incidence set on the old fuselage +2 degrees as the plan as my previous post.
I have set the new wing at zero and the stab at 1.5.
I am leaving the stab at 1.5 as it has little bearing on the way the aircraft will fly but on checking the original fuselage firewall with my new engine in i found there had been a mistake, this is the original fuselage as only the wing was wrecked, the firewall was +4 degrees that is the nose was pointing down by 4 degrees so i can understand why it was a pig to land the wing with the original +2 degrees and the original engine at +4 degrees makes it a grand total of down thrust of +6 degrees not a good idea for nice landings.
The engine i have put in is a 3W85 and i have left in 2 degrees of down thrust.
On checking the plan for the cg i found that the cg is set at 120 mm from the leading edge of the middle of the wing.
If you look at the plan the wheel axles are set 30mm in from the leading edge.
The cg at 120mm and the axels at 30mm make a difference of 90 mm that is far to far apart thats 6 inches in the old money.
That would put to much weight on on the tail when landing so as the wheels touch down the tail would drop and make the aircraft bounce. I have moved the axles back o 60mm from the front of the wing.
Dave.
Old 05-10-2014, 09:39 PM
  #478  
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Originally Posted by DaddySam
The canopy has been a tedious affair, which I was not expecting after the complexity of the Corsair canopy of my last build. I had installed a brass channel for the rail and was not happy with either the look or the fact that the canopy would not be captured by the rails and could fly off. So I used a soldering gun to melt the epoxy and pulled off the old channel, and made some new "C" rails with a Dremel router table I bought years ago, thinking that it would be cheaper to buy the router table than to buy slotted rails commercially. I'm getting there, just putting some finishing touches on the frame before I glue the windscreen in and paint the frame.
This I what I need to do for my Yellow Spitfire as my canopy rails are 'open' type slot rails that can not hold the canopy in place. Good work Daddy Sam.

Brad
Old 05-11-2014, 08:43 AM
  #479  
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Originally Posted by dubs1946
Hi i am glad this has come to life again.
On building a new wing for Stans aircraft i found the wing incidence set on the old fuselage +2 degrees as the plan as my previous post.
I have set the new wing at zero and the stab at 1.5.
I am leaving the stab at 1.5 as it has little bearing on the way the aircraft will fly but on checking the original fuselage firewall with my new engine in i found there had been a mistake, this is the original fuselage as only the wing was wrecked, the firewall was +4 degrees that is the nose was pointing down by 4 degrees so i can understand why it was a pig to land the wing with the original +2 degrees and the original engine at +4 degrees makes it a grand total of down thrust of +6 degrees not a good idea for nice landings.
The engine i have put in is a 3W85 and i have left in 2 degrees of down thrust.
On checking the plan for the cg i found that the cg is set at 120 mm from the leading edge of the middle of the wing.
If you look at the plan the wheel axles are set 30mm in from the leading edge.
The cg at 120mm and the axels at 30mm make a difference of 90 mm that is far to far apart thats 6 inches in the old money.
That would put to much weight on on the tail when landing so as the wheels touch down the tail would drop and make the aircraft bounce. I have moved the axles back o 60mm from the front of the wing.
Dave.
Hey Dave, I guess in my seniority I'm missing something here...if wing incidence is +2 degrees and firewall is +4 that's 6 degrees up incidence isn't it (engine would be pointing up)? But if the wing is +2 and the firewall is pointing down then that's 4 degrees negative for a net of 2 degrees down...... I'm likely wrong but my mind isn't finding it.....

Sandy
Old 05-11-2014, 10:40 AM
  #480  
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Nice work Sam! Glad to see you back!

Casey
Old 05-11-2014, 06:10 PM
  #481  
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Hi Sandy yes you are correct i am getting my plus and minus mixed up.
The original configuration of the aircraft was the front of the wing was up by + 2 degrees as the plan but there was a mistake in the firewall that was pointing the engine down by - 4 degrees. The plan states zero degrees.
As i understand it the wing or any wing will always try and fly at zero degrees or what the wing perceives itself as zero degrees, that will push the nose down or try and push the nose down by the two degrees so the two combined make six degrees or have i got the wrong end of the stick
Does that make sense or have i the wrong end of the stick.
I guess the Vailly plan has the +2 degrees on the wing to get 2 degrees of down thrust on the engine.
Dave
Old 05-12-2014, 11:08 AM
  #482  
DaddySam
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I painted the canopy frame but the tape pulled off a bunch of the paint -GRRRR. I am going to try to respray it using a paper card with a slot cut in it as a mask. But here is the canopy on the plane with the initial paint on. I need to send out a big "Thank you" to Chad Veich, who pulled the canopy for me. He still has the mold, or plug, or whatever, so if anybody else is going this route, he is your man!
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Old 05-12-2014, 11:31 AM
  #483  
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Sam the Hurricane looks great, I live very close to Chad and I agree with you, if you need just about anything Chad is Awesome. Regarding your masking tape paint pull problem. Tamiya makes a very low stick masking tape which has proven to be gentle on underlying paint, when I used to build scale plastic models I used it to mask decals. Another option which might work is to use post it notes, I get the longer pads and overlap them, the trick with the post it notes is to use very little paint and lots of coats, to avoid the dreaded bleed under.

Love the Hurricane!

Cheers
Old 05-14-2014, 05:07 AM
  #484  
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Looking great dad!
Old 05-14-2014, 07:24 AM
  #485  
DaddySam
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Thanks Gunnar! Maybe we can taxi it when you're up visiting - unless it (and me) are ready for a flight!
Old 05-14-2014, 10:41 AM
  #486  
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Only 32 days!!
Old 05-30-2014, 12:38 PM
  #487  
DaddySam
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I've been spending a lot of time getting the controls working, the radio installed, wiring, etc - stuff you have to do with any plane. The choke rod on the 3W gave me fits until I downsized the fuel tank from 24 to 20 oz. On the second plane I'll get these things done beforer finishing. I have nav lights in the wings and now the fuse. Here are some pix of the fuse lights. Not long now till some engine runs - then I need to get flying (no I have not been out all year yet) so I can be ready for this plane.
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Old 06-06-2014, 05:08 PM
  #488  
DaddySam
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I got the engine running the other day. I took a short video of the motor running with the cowling on. Here is the link:
https://www.youtube.com/watch?v=mBNJRCWHoX0
Old 06-08-2014, 03:41 PM
  #489  
DaddySam
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I need to check the CG on the plane but I want to do it with the pilot figure and cockpit in place. I wanted to have a removable cockpit so I can get to the gas tank and air tank, and anything else in that area. I tried unsuccessfully and finally came up with an idea that I think will work. The cockpit is made from balsa and dowel. The seat is made from balsa covered with metal tape, painted with black primer. I sprayed the wood with Clarke Industries warpaint interior green. The pilot was gutted - only his head, feet, and hands are left. I cut the weight by six ounces by doing this - making a torso from styrofoam. The pics should be pretty self explanatory.
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Old 06-08-2014, 06:37 PM
  #490  
DaddySam
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Here's a little better pic of the cockpit without the pilot. Still need the rudder pedal trays and a seat belt harness!
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Old 06-15-2014, 10:25 AM
  #491  
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It's a quiet cool Father's Day morning, so I could not resist trying to make the foot trays for the cockpit. I made them out of balsa, covered with metal tape, and the channels were added with a pencil following a piece of 1/8" spruce. I may get to CG it later today, before work. Happy Father's Day to all you dads out there! I ordered some seat belt material and hardware from Dynamic Balsa. Hopefully it will arrive on my days off this week.
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Old 06-21-2014, 06:06 AM
  #492  
DaddySam
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I finally got the plane on the CG machine yesterday. I had hoped for no lead needed, but ended up with a small baggie of shot needed in the cowl area to get it to balance. It now balances in the middle of the cg range with the wheels up and at the forward cg mark with the wheels down - no fuel on board but otherwise ready to fly. I know I could reduce some of the lead needed by using a different tail wheel assembly but I like the Sierra assembly. All up weight is about 30-1/2 lbs to 31lbs. about 3 lbs heavier than my target (and the amount of lead I had to add no less). I've seen these fly well at 32 so I'm hopeful that it will be a decent performer with the 3w-50i. Next up will be some taxi tests and then a maiden. When it was hanging from the CG machine I took a few pix showing the wingtip lights, the lead on the cowl, and the balance point.
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Old 06-21-2014, 09:11 AM
  #493  
Chad Veich
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It's a beauty Sam and should fly just fine at 31 pounds. Heck, that seems very light to me for a model of this size! Good luck with the test flights and be sure to get lots of good pictures!
Old 06-21-2014, 04:54 PM
  #494  
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Thank you Chad, for your expertise and support throughout the build. I hope to have taxiing video next week and maybe flight video soon after. My brother is moving back to CA at the end of July and I'm depending on him to be my cameraman. Here is a pic of the Hurri on the CG machine; I have been leery of the damage the ropes cause the wing surface until I read about a guy who used flat rubber tarp straps. They work really well.
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Old 07-06-2014, 08:01 AM
  #495  
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While waiting for the taxi test to materialize, I decided to add some detail to the antenna mast and some seatbelts for the pilot. After playing around with solartex, I ordered some seatbelt material and hardware from Dynamic Balsa. I stained the belt material with interior green paint. Not perfect, but it looks better than my velcro strap! I probably will not try to fly the plane at first with the rear antenna mast, as it is a friction fit right now.
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Old 07-16-2014, 10:00 AM
  #496  
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Took the Hurri out to do some taxi tests yesterday. I found it is tippy, wanting to go up onto it's nose if I'm not careful, especially on a downwind taxi. I am going to put a few washers under the trailing edge of the gear mounts to kick the wheels forward a degree or two. I also found my strut covers were too long. Watched a video of my subject and ended up cutting 1/2" off of the bottom of the covers. It should really help prevent any chance of them hooking the dirt. I also found my tailwheel steering rod needs another brace, to keep the wheel from kicking sideways and sticking there. The motor ran great until I tried some revs - it did not take long to heat up. I still feel that the air intake will work once the plane is airborne. I just have to limit my running time on the ground - especially when the temp is in the 90's. In the first pic there is a full scale crop duster flying in the background.
Here are a few pix:
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Last edited by DaddySam; 07-16-2014 at 10:16 AM. Reason: better pix
Old 04-12-2015, 09:48 AM
  #497  
ChrisPetersen
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I picked up this Hurricane pre built. I ended up stripping it, recovering it and changing a bunch of stuff. I did the fabric in the tail and glassed the wing and front part of fuselage. Its powered by a DA85 and keleo exhaust and controlled by a jeti ds16. I have a few questions. I have the cg setup at 5 inches. Is that a good starting point? and what is everybody doing for control throws?
any input would be appreciated.
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Last edited by ChrisPetersen; 04-12-2015 at 09:59 AM.
Old 04-13-2015, 05:05 AM
  #498  
DaddySam
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Chris,
The cg range is 4-1/2 to 5" from the LE of the wing at the center section. . I have my CG at about 4.75". From the plans, elevator is 30 degrees up and 25 degrees down; rudder is 20 degrees either side; flaps are 60 degrees; ailerons 25 degrees up and down. I have my flaps on a slider and have almost 90 degrees of throw possible, but will start with much less. My flaps are also closer to scale, which means smaller than the plans. My elevator has as much up throw as I can get, but I have triple rates so that for flying around I will have it much tamer, but on landing I want as much on hand in case I need it, coupled with a lot of expo on the elevator in the full throw position. You've done a great job! I hope to get mine in the air this summer. I've almost finished re-wiring the wing plugs with a thunderbolt RC plug so I won't have quite so many independent connections to make. Good luck and keep us posted.
Sam
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Old 04-13-2015, 06:46 AM
  #499  
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Thank you! That's exactly what I was looking for.
Old 04-13-2015, 05:53 PM
  #500  
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Hi i have had 14 flights with mine and only two good landings.
It likes to eat worms on landing, i have moved the wheels forward as well but am still testing.
My CG is set with the wheels down at the rearward point shown on the plan. I did this to try and get as much bite in the elevator as i can for the landing.
I have triple switches as well and fly on the mid range and go to high range when the flaps come down I have a feeling that at low landing speeds the four split flaps might be smothering the elevator.
When landing i try to get it as flat as possible and a couple of feet of the deck before applying flair.
With a 3W85 in it has plenty of go and it is a fantastic flier the wing is a masterpiece my aircraft with the CG set on the rear point turns on a sixpence .
It likes to drop a left wing on take off so lots and lots of aileron and right rudder held through the climb out, keep the speed up on take off.
Dave.

Last edited by dubs1946; 04-18-2015 at 04:58 PM.

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