The complete YELLOW AIRCRAFT SPITFIRE thread.
07-06-2008, 09:04 AM
#51
RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Just a quick thought Mark,
I am planning the clipped wing version so wont be using the wing tips but is there plans with the kit to show what I will need to achieve this?
Brad
Brad, the kit does not come with the alternative plans for the clipped wing version, but that should be easy enough to accomplish by looking at picture references. If I had it to do over, I might go for the clipped version too if for no other reason than avoiding the wing tip "issue" completely. Should get a little snappier performance too.
I am planning the clipped wing version so wont be using the wing tips but is there plans with the kit to show what I will need to achieve this?
Brad
Brad, the kit does not come with the alternative plans for the clipped wing version, but that should be easy enough to accomplish by looking at picture references. If I had it to do over, I might go for the clipped version too if for no other reason than avoiding the wing tip "issue" completely. Should get a little snappier performance too.
07-06-2008, 10:13 AM
#52
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Regarding the clipped wings. If you research this you will find that they created the full scale clip wing versions in the field by fitting carved down wood pieces on each wing tip. Duplicating this in the model version is just as easy. You can just bond a block of balsa to the wing tip and carve it down. A true scale representation of this will only yield a wingspan of about 79 inches. I purposely cheated it up to 80 inches on the one I built because I did not want any controversy at IMAA events. Flight performance does "NOT" improve. It is degraded slightly. Flown side by side with my son's full wing Spitfire it is about 5 mph slower on top end with all other weight, engine, and prop details equal. Also, my airplane will enter a high speed stall if you pull too hard. The full wing version will not do this. I've done it twice over the past 5 years and it scares you to death because the airplane is going about 100 mph but it is not flying. The only way I was able to save it was cut the throttle and push the stick down. Not a natural thing to do when you are heading toward the earth so fast. I am very cautious doing a loop and/or a split-s with it. Most of the time I will avoid these maneuvers all together. The full wing version can do both of these maneuvers hauled in tightly with no fear of high speed stall. Leo
Shots 1 - 3 below are full scale. Shot 4 is the model.
Shots 1 - 3 below are full scale. Shot 4 is the model.
07-07-2008, 12:28 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
ORIGINAL: Brad330l
My Mate and flying flying buddy has just become the sole Aussie distributor for Warbird Colours (colors) so my search for a paint system has come to an end.
http://www.warbirdcolours.net/default.htm
No appoligies for a free plug and helping hand for him to all of us here in Australia.
I'm sure any one of you who have imported it from the States has had great service over the years. It is just that this stuff is here now so postage times will be greatly reduced.
On ya Baz!!!
Brad
My Mate and flying flying buddy has just become the sole Aussie distributor for Warbird Colours (colors) so my search for a paint system has come to an end.
http://www.warbirdcolours.net/default.htm
No appoligies for a free plug and helping hand for him to all of us here in Australia.
I'm sure any one of you who have imported it from the States has had great service over the years. It is just that this stuff is here now so postage times will be greatly reduced.
On ya Baz!!!
Brad
give Barry a poke in the ribs from me!!
07-07-2008, 04:30 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
There is a carb intake adapter made by Toni Clark of Germany. It would make it much easier to hide the carb on the G62. Maybe a Bennett muffler slim profile, or you can buy a wrap around pitts and maybe have it cut down to fit within the cowl. Just some ideas.
Sam
Sam
07-07-2008, 04:44 AM
#57
07-07-2008, 07:00 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
ORIGINAL: Peter_OZ
hey Brad, don't forget to finish that P51, it has only waited some 20 years
I'll get Bazza to nag you about it!
hey Brad, don't forget to finish that P51, it has only waited some 20 years
I'll get Bazza to nag you about it!
We have a long history up here with Pilbara Aeromodellers.
Yes the P51,,,, it is at least closer now with the foam wing from CJ.
I will have some serious thinking to do when the Spitty arrives.
All in good time ay?
Cheers,
Brad
07-07-2008, 07:12 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
ORIGINAL: Spychalla Aircraft
Regarding the clipped wings. If you research this you will find that they created the full scale clip wing versions in the field by fitting carved down wood pieces on each wing tip. Duplicating this in the model version is just as easy. You can just bond a block of balsa to the wing tip and carve it down. A true scale representation of this will only yield a wingspan of about 79 inches. I purposely cheated it up to 80 inches on the one I built because I did not want any controversy at IMAA events. Flight performance does "NOT" improve. It is degraded slightly. Flown side by side with my son's full wing Spitfire it is about 5 mph slower on top end with all other weight, engine, and prop details equal. Also, my airplane will enter a high speed stall if you pull too hard. The full wing version will not do this. I've done it twice over the past 5 years and it scares you to death because the airplane is going about 100 mph but it is not flying. The only way I was able to save it was cut the throttle and push the stick down. Not a natural thing to do when you are heading toward the earth so fast. I am very cautious doing a loop and/or a split-s with it. Most of the time I will avoid these maneuvers all together. The full wing version can do both of these maneuvers hauled in tightly with no fear of high speed stall. Leo
Shots 1 - 3 below are full scale. Shot 4 is the model.
Regarding the clipped wings. If you research this you will find that they created the full scale clip wing versions in the field by fitting carved down wood pieces on each wing tip. Duplicating this in the model version is just as easy. You can just bond a block of balsa to the wing tip and carve it down. A true scale representation of this will only yield a wingspan of about 79 inches. I purposely cheated it up to 80 inches on the one I built because I did not want any controversy at IMAA events. Flight performance does "NOT" improve. It is degraded slightly. Flown side by side with my son's full wing Spitfire it is about 5 mph slower on top end with all other weight, engine, and prop details equal. Also, my airplane will enter a high speed stall if you pull too hard. The full wing version will not do this. I've done it twice over the past 5 years and it scares you to death because the airplane is going about 100 mph but it is not flying. The only way I was able to save it was cut the throttle and push the stick down. Not a natural thing to do when you are heading toward the earth so fast. I am very cautious doing a loop and/or a split-s with it. Most of the time I will avoid these maneuvers all together. The full wing version can do both of these maneuvers hauled in tightly with no fear of high speed stall. Leo
Shots 1 - 3 below are full scale. Shot 4 is the model.
In regards to your preformance of your and your sons (ex)Spitfire I find it hard to believe the difference in that yours will high speed stall to the point of you not wanting to do loops and split s's. I am in no way disputing this or your ability or building I just am spinning out that the model will do this. I have no doubt also that CoG and elevator travel is not an issue either.
Brad
07-07-2008, 09:24 AM
#60
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Brad,
yeah bazza is a real card, great fun! Will have to get over that way one day and av a beer or 2!
Well you know what they say about time . . .
It is like saying to your kids, yes I will play with you tomorow . . .
cheers
PEter
yeah bazza is a real card, great fun! Will have to get over that way one day and av a beer or 2!
Well you know what they say about time . . .
It is like saying to your kids, yes I will play with you tomorow . . .
cheers
PEter
07-07-2008, 10:28 AM
#61
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
With the narrow front end of the plane its impossible to hide the exhaust. As mentioned Tony Clark sells an adapter that moves the carb from the side around so it faces from the rear. I'm not sure how well this works in the Spit. If I were to use a gas engine in the plane I'd use one with a rear carb intake like a DA50. or 3W etc. I used a Moki1.8 and the entire engine was hidden with the exception of the very tip of the cylinder head. The muffler was a pitts style and exited from the bottom, again very unobtrusive.
07-09-2008, 05:21 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Yee Ha!!! Got my servos receiver and switches and stuff.
Now, where is this model Spitfire. Oh man I cant wait any longer!!![sm=spinnyeyes.gif]
Brad
Now, where is this model Spitfire. Oh man I cant wait any longer!!![sm=spinnyeyes.gif]
Brad
07-09-2008, 07:56 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Tonight I have printed out the tail plane plans that Chad has so kindly sent me. I tried at work but couldnt get it right but here at home with the trusty old Cannon and a bit of resizing in 'Paint' it has worked out real beaut. I think I have them about 1/32nd or so bigger on the provided scale on the plan. Now for me that is close!!![sm=49_49.gif]
Tomorrow it is take them to work and make some copies for the ironing method. (work has lots of paper)
Nice size tail plane it will be too.
Brad
Tomorrow it is take them to work and make some copies for the ironing method. (work has lots of paper)
Nice size tail plane it will be too.
Brad
07-12-2008, 10:26 PM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Hey Guys, what retractable tail wheel are you using if not the Yellow A/C one?
Did you put one in at all? I see Leo did not.
Here are some pictures of what I would like to achieve.
Brad
Did you put one in at all? I see Leo did not.
Here are some pictures of what I would like to achieve.
Brad
07-13-2008, 12:18 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Brad, I'm sure there are other options out there but on my Platt 1/5 scale Mk.XII I used a B&D nosewheel retract unit for the tailwheel and it worked great.
07-19-2008, 02:10 AM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
I am sick and miserable.[&o]
Anyone got some news or pictures of their Spitty to make me feel better?
Couldnt even get to the shed if I wanted to.
Brad
Anyone got some news or pictures of their Spitty to make me feel better?
Couldnt even get to the shed if I wanted to.
Brad
07-19-2008, 06:08 AM
#69
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
ORIGINAL: Brad330l
I am sick and miserable.[&o]
Anyone got some news or pictures of their Spitty to make me feel better?
Couldnt even get to the shed if I wanted to.
Brad
I am sick and miserable.[&o]
Anyone got some news or pictures of their Spitty to make me feel better?
Couldnt even get to the shed if I wanted to.
Brad
And yes... that is a 1/4 scale YAK-3 fuse plug you see peeking out from behind that Spitty. Once I get done with some B/C Model Mustang parts I am messing with I have to blow the dust off that baby, build a mold, and crank out some parts. That is #2 in the backlog and our buddy Peter_Oz is waiting on me for one. I want one too. Who ever said this is "Just a Hobby". Leo
07-19-2008, 06:44 AM
#70
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Now for something useful. Do you want your gear to stay in your YA Spitfire wing when you have a less than perfect landing? Well then you have to change the mounts. This is best done when you build the airplane and not after the fact as I am doing here! The YA gear blocks are just in the foam only. Bad design. You have to extend the inner plywood gear block out to pick up and bond to the ply wing joiners. This is the only way to get significant strength. It requires some pretty serious surgery that you will see in the pictures depicted. It starts with ripping out the old blocks. Routing a slot for the new ply. Making new ply mounts. Bonding them in and replacing the foam and balsa you destroyed in the process. I used that Urethane glue to put things back in place. Either Gorilla Glue or ProBond work fine. I will try to scan or draw my inner wing template and get it posted out here with a link. Leo
07-19-2008, 09:12 AM
#71
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
A picture of my Spit. Moki 1.8 for power.
I agree with Leo completely. The retract rails should be modified. I modified mine as well and they held up fine. You would think that YA (by now) would get it that the gear rails are much to fragile for this plane and change the mounts.
I agree with Leo completely. The retract rails should be modified. I modified mine as well and they held up fine. You would think that YA (by now) would get it that the gear rails are much to fragile for this plane and change the mounts.
07-19-2008, 08:19 PM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Leo, I've said it before and I'll say it again, "you are an extreme modeller!!!"
Yes I am still waiting on my Spitty and cant believe you have ten!! AND the price, oh man I feel woozy
You simply must post the information and templates of your UC mod right here or sell it as a kit or something to us less than perfect landing pilots.
Mate if you have a 1/5 scale P47, bang out a mould and send Peter a fuz so he can finish his build before you send him a Yak!!
I dont suppose I can talk though all I have achieved over the last couple of years is a bunch of electrics, a glider and some ARFs.
Thanks to you too BobH, I do feel a bit better seeing some one wheeling their Spitfire out for a flight.
Cheers Guys,
Brad (just strong enough to type)
Yes I am still waiting on my Spitty and cant believe you have ten!! AND the price, oh man I feel woozy
You simply must post the information and templates of your UC mod right here or sell it as a kit or something to us less than perfect landing pilots.
Mate if you have a 1/5 scale P47, bang out a mould and send Peter a fuz so he can finish his build before you send him a Yak!!
I dont suppose I can talk though all I have achieved over the last couple of years is a bunch of electrics, a glider and some ARFs.
Thanks to you too BobH, I do feel a bit better seeing some one wheeling their Spitfire out for a flight.
Cheers Guys,
Brad (just strong enough to type)
07-19-2008, 10:14 PM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
A couple of questiions for today.
What size air tank do you guys run for these size retracts in the Spitty?
http://www.robart.com/air_systems/airtanks.aspx
And where did you place it?
What size fuel tank? Shape? This will be to suit a 55cc gasser.
Cheers,
Brad
What size air tank do you guys run for these size retracts in the Spitty?
http://www.robart.com/air_systems/airtanks.aspx
And where did you place it?
What size fuel tank? Shape? This will be to suit a 55cc gasser.
Cheers,
Brad
07-20-2008, 07:37 AM
#74
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Brad,
32 oz. on the CG gives about 20 to 25 min. run time on a 50 cc gasser depending on throttle settings. I like to fly a long time when I am up. Put it on the CG so that you don't have trim changes when you fly. We do the radio install on the Spitty with a removable tray. You can assemble and mount everything outside the plane and then just slide it into the fuse and bolt it in. With the tray out you can get you hand into the front of the fuse for access to engine mounting bolts, throttle servo, choke servo, batteries etc. My tank is banded to the top of this removable tray. A key that makes this whole thing possible is a pushrod end mounting technique I created which I nicknamed the guillotine. You capture the pushrod outer end in a wooden clamp structure that can be easily removed. A wooden washer is bonded to the end side of the outer sleeve. You only have to hold the pushrod on one side because an outer sleeve only works in tension. Never in compression. The guillotine doesn't even need to clamp it tight. A loose fit is fine.
Wow! I am glad I took these photos this morning! Check out the missing antenna on the secondary 2.4 gHz reciever. I didn't notice it until I was editing these pictures. I have lost them before on other recievers so I put shrink tubing on them to help reduce stress points. It is gone! This will need replacement. Leo
32 oz. on the CG gives about 20 to 25 min. run time on a 50 cc gasser depending on throttle settings. I like to fly a long time when I am up. Put it on the CG so that you don't have trim changes when you fly. We do the radio install on the Spitty with a removable tray. You can assemble and mount everything outside the plane and then just slide it into the fuse and bolt it in. With the tray out you can get you hand into the front of the fuse for access to engine mounting bolts, throttle servo, choke servo, batteries etc. My tank is banded to the top of this removable tray. A key that makes this whole thing possible is a pushrod end mounting technique I created which I nicknamed the guillotine. You capture the pushrod outer end in a wooden clamp structure that can be easily removed. A wooden washer is bonded to the end side of the outer sleeve. You only have to hold the pushrod on one side because an outer sleeve only works in tension. Never in compression. The guillotine doesn't even need to clamp it tight. A loose fit is fine.
Wow! I am glad I took these photos this morning! Check out the missing antenna on the secondary 2.4 gHz reciever. I didn't notice it until I was editing these pictures. I have lost them before on other recievers so I put shrink tubing on them to help reduce stress points. It is gone! This will need replacement. Leo
07-20-2008, 04:20 PM
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RE: The complete YELLOW AIRCRAFT SPITFIRE thread.
Great information Leo.[sm=thumbs_up.gif] This is gold.
I see your air tank in the pictures, is this the only one on board? If so how many cycles of the gear do you get?
It is the medium size tank right?
Cheers again,
Brad
I see your air tank in the pictures, is this the only one on board? If so how many cycles of the gear do you get?
It is the medium size tank right?
Cheers again,
Brad