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Ordered a 1/2A Skyray kit

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Re: Ordered a 1/2A Skyray kit

Post  roddie on Mon Oct 09, 2017 5:08 am

I like that little clunk-tank. It should work for you. I can't understand the issues with the wedge... Huh... I usually (pretty much always..) orient the engines' backplate horizontally on the firewall when running a wedge tank. I realize that you can't do that with your current engine-mount.

Here's a few examples..





It's just a theory.. but your PT's fuel tank feeds straight-down.. and loops back up to its vertically-oriented backplate. Its fuel-line doesn't transition from horizontal to vertical.. and has no trouble using all the fuel. If you experience the same issue with your clunk-tank.. that could be the problem.. and switching to a balloon-tank may not help the situation. I could be wrong... so take that with a grain of salt.

A "pressure-bladder" fuel-feed is another option.. but there's a couple of issues at play. There's a learning-curve associated with their operation.. and they require a "fine-thread" needle-valve to work well. On the positive side; a pressure-bladder will feed the engine in any position. This is why most people use them rather than fussing with tanks. The older Cox .049 product-engines came with the fine-thread needle-valve assemblies. They were know as "postage-stamp" engines.. and had no mounts for use on a balsa model.

Here's what the engine looks like. If you see one.. or just the backplate with needle.. grab it. Its fine-thread NVA can be swapped into the newer style backplate that you have, for running a pressure-bladder.



You may be better-off running an "integrally-tanked" engine like the "Silver Stunter" like you were considering before the build.

Good luck.. I hope you get it figured out. Thumbs Up
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Was hoping to fly the Skyray this weekend

Post  TLAnderson on Sun Oct 29, 2017 2:30 pm

...but, the 40 mph wind and 3 inches of snow we got on Friday kind of put the kibosh on that idea. It's about 33 degrees f here today and windy, so I guess I'll have to wait for better weather. Might happen about seven months from now.

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Re: Ordered a 1/2A Skyray kit

Post  Oldenginerod on Sun Oct 29, 2017 4:03 pm

TLAnderson wrote:...but, the 40 mph wind and 3 inches of snow we got on Friday kind of put the kibosh on that idea. It's about 33 degrees f here today and windy, so I guess I'll have to wait for better weather. Might happen about seven months from now.

Hey, the plane looks fine just sitting there.  Why mess it up by flying it? lol!
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Re: Ordered a 1/2A Skyray kit

Post  roddie on Sun Oct 29, 2017 4:30 pm

All you need are some skis... Shocked These were very easy to make. Aluminum "flashing" sheet, popsicle-sticks, a tiny pair of eye-screws.. double-sided foam tape, and some tubing for hubs. A piece of string tied to the eye-screws doesn't need to be an exact length. A rubber-band looped-around the string can be stretched over a tail-skid.

https://www.coxengineforum.com/t5765-skis-for-winter-flying?highlight=skis




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Re: Ordered a 1/2A Skyray kit

Post  TLAnderson on Sun Oct 29, 2017 7:03 pm

Pretty cool skis, Roddie. Might have to make a set. I remember messing around with my .049s as a kid, when it was cold out. Prop strikes on cold fingers hurt! Damn!
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Re: Ordered a 1/2A Skyray kit

Post  roddie on Sun Oct 29, 2017 7:41 pm

TLAnderson wrote:Pretty cool skis, Roddie. Might have to make a set. I remember messing around with my .049s as a kid, when it was cold out. Prop strikes on cold fingers hurt! Damn!

Thanks for the compliment! Yes.. cold-weather flying is tough on the fingers. There's a few threads here on cold-weather flying. I haven't done a whole lot.. but one trick to getting your engine to start and run.. is to keep its' cylinder-head warm. This can be accomplished with the use of those "hand-warmers" that are sold for Winter activities. One of these placed in to a small zip-seal bag as a "hood" for placing over the cylinder would do the trick. Some modelers claim that "yarn" wrapped-between the cooling-fins of the glow-head helps to keep it "HOT" when flying in cold weather. That makes perfect sense to me.

Why not give it a try? You may find that flying your models through the Winter-months is possible. Often there are beautifully clear and windless days in the Winter.



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Re: Ordered a 1/2A Skyray kit

Post  David Ingham on Sun Oct 29, 2017 8:38 pm

I haven't ever flown on snow, but maybe on a sunny day in Massachusetts winter, I don't remember well.
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Re: Ordered a 1/2A Skyray kit

Post  roddie on Sun Oct 29, 2017 8:59 pm

David Ingham wrote:I haven't ever flown on snow, but maybe on a sunny day in Massachusetts winter, I don't remember well.

Did you live in Massachusetts David? I grew-up in Franklin, Mass. It's my hometown.. and I have family there. Franklin is in the South-Eastern part of the state.. roughly 30mi. South of Boston. I now live in Northern Rhode Island.. (N. Smithfield) which borders S.E. Massachusetts.. (Uxbridge/Millville) and is only 30 minutes (back-roads) from Franklin, MA.

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Re: Ordered a 1/2A Skyray kit

Post  TLAnderson on Sun Oct 29, 2017 9:28 pm

roddie wrote:Often there are beautifully clear and windless days in the Winter.

Only problem with those clear windless winter days around here is that the temperature is usually about 15 degrees below zero Cold
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Re: Ordered a 1/2A Skyray kit

Post  David Ingham on Mon Oct 30, 2017 1:23 pm

Back when I was doing research, I worked for the University of Minnesota for one year and for MIT for bout three years.  I lived in Ipswich and few with and joined a stunt control line club in Danvers.  I bought my first PT 19 at a yard sale in Ipswich.
If I hadn't spent the year in Minneapolis, I would have thought Massachusetts was cold.
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Re: Ordered a 1/2A Skyray kit

Post  TLAnderson on Mon Oct 30, 2017 7:45 pm

David Ingham wrote:Back when I was doing research, I worked for the University of Minnesota for one year and for MIT for bout three years.  I lived in Ipswich and few with and joined a stunt control line club in Danvers.  I bought my first PT 19 at a yard sale in Ipswich.
If I hadn't spent the year in Minneapolis, I would have thought Massachusetts was cold.

-38° f is the coldest I've seen it since I've lived up here. I'm close to Lake Superior. The lake moderates the temperatures somewhat. Not far west of here, in Minnesota, the low hit -60° f one night, a few years ago.

We get a little snow around here also. This is what I push it around with.

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Re: Ordered a 1/2A Skyray kit

Post  getback on Tue Oct 31, 2017 12:04 pm

That snow is pretty but even prettier that its wee you are LOL . Heck the last few years i have trouble being in the 50 degree outside with my hands getting numb and so cold that it hurts ! Cold Here is 40 at night and around 60 daytime but when the light goes out i go in Beer Cheers
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Re: Ordered a 1/2A Skyray kit

Post  RknRusty on Tue Oct 31, 2017 1:58 pm

Damn, Dudes, you Northeasterners and Midwesterners are made out of tough stuff. I admire how y'all tough it out through the winter only to be rewarded with a tease of summer. Skis on your planes, plows on your Jeeps, and wearing 20 pounds of clothes.
Cold  Cold  Cold .............. Nah! I'll opt for my sweat Hot Warm Hot

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Re: Ordered a 1/2A Skyray kit

Post  roddie on Wed Nov 01, 2017 10:42 pm

RknRusty wrote:Damn, Dudes, you Northeasterners and Midwesterners are made out of tough stuff. I admire how y'all tough it out through the winter only to be rewarded with a tease of summer. Skis on your planes, plows on your Jeeps, and wearing 20 pounds of clothes.
Cold  Cold  Cold .............. Nah! I'll opt for my sweat Hot Warm Hot

It's not bad enough "yet" to move down south Rusty! Lynne and I have lived here in the Northeast all our lives. Getting a model-engine roaring when there's frost on the grass is exhilarating.. especially after your finger gets bitten by the propeller a few times.. and your ears start getting numb. I want to try "Phil's" (pkrankow) method of wrapping a few turns of "sewing-yarn" between the cooling-fins of a Cox glow-head.. for when it gets really cold!
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Re: Ordered a 1/2A Skyray kit

Post  RknRusty on Wed Nov 01, 2017 11:27 pm

roddie wrote:
RknRusty wrote:Damn, Dudes, you Northeasterners and Midwesterners are made out of tough stuff. I admire how y'all tough it out through the winter only to be rewarded with a tease of summer. Skis on your planes, plows on your Jeeps, and wearing 20 pounds of clothes.
Cold  Cold  Cold .............. Nah! I'll opt for my sweat Hot Warm Hot

...I want to try "Phil's" (pkrankow) method of wrapping a few turns of "sewing-yarn" between the cooling-fins of a Cox glow-head.. for when it gets really cold!  
I can promise you I'll never need to try that. While you're playing, I'll be sitting in front of a toasty fireplace in my living room, Lol. But I do pass it on to my cold weather friends when the discussion arises.
BrrrRusty

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Re: Ordered a 1/2A Skyray kit

Post  dckrsn on Wed Nov 01, 2017 11:57 pm

RknRusty wrote: I'll be sitting in front of a toasty fireplace in my living room, Lol. But I do pass it on to my cold weather friends when the discussion arises.
BrrrRusty
Loud and clear Rusty.
I don't know how much more Roddy can take, but my dearest
and I are looking south in coming years. I've braved the cold
well, but it's getting old(like me). We're thinking Louisiana, after
several visits.
Bob
edit: I have always loved hitting the beaches in the dead of winter
when the winter is at it's worst, wearing the usual "20lbs" of layers
and layers of clothes. I'm still into that, but having to do the other
day to day stuff in the cold, kinda ........ .
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Re: Ordered a 1/2A Skyray kit

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