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Old 06-08-2009, 06:20 PM   #1
forgues research
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Default 40% Turbo Laser (scratch built)

Well guys,, I am having so much fun flying my 34% Turbo prop laser, I have decided to put the T 34 on the back burner for now and build another laser, but this time the 40%.

Being a Turbo prop engine, which has absolutely no vibrations, I plan to make this airplane as light is it will be possible, I'm shooting for 28 lbs.

Today I have cut the formers and started to lightning them up as I will through out the building process.

Roger
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Old 06-08-2009, 10:57 PM   #2
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Default Re: 40% Turbo Laser (scratch built)

Sub'd. What kind of turbo prop are you using?
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Old 06-08-2009, 10:58 PM   #3
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Default Re: 40% Turbo Laser (scratch built)

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Sub'd. What kind of turbo prop are you using?

Tentatively, its the one on the other laser but I have been offered the use of a Wren 54.

Roger
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Old 06-09-2009, 01:33 AM   #4
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Default Re: 40% Turbo Laser (scratch built)

Hi Roger,

Looks like you are hooked on Lasers as I am on Ravens, I think it is great to keep developing a concept to its potential, all the best for an exciting new build. I'm hooked too !

What is the step up in power with the bigger Wren, and how does that equate to an IC Petrol engine ? And, what prop would you turn ?

I've just opened a nice Hawkes Bay red to celebrate your build... not bad too !!

Cheers, Barrie.
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Old 06-09-2009, 06:03 AM   #5
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Default Re: 40% Turbo Laser (scratch built)

Subscribed!
You never know what Roger may fabricate in his shop for himself next!
(Did you get my e mail last Thursday? I do see you've been quite busy! I understand too if your back burners are on simmer. No real rush.)

brusty- - Wow some Raven! That plane in your avatar really looks BA!
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Old 06-09-2009, 08:49 AM   #6
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Default Re: 40% Turbo Laser (scratch built)

Quote: Originally Posted by brusty
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Hi Roger,

Looks like you are hooked on Lasers as I am on Ravens, I think it is great to keep developing a concept to its potential, all the best for an exciting new build. I'm hooked too !

What is the step up in power with the bigger Wren, and how does that equate to an IC Petrol engine ? And, what prop would you turn ?

I've just opened a nice Hawkes Bay red to celebrate your build... not bad too !!

Cheers, Barrie.
Hi Barrie,
Yes it is a nice airplane to fly.

I am looking at using a 28 * 6 prop for this airplane , as I don't need the speed. I might purchase one from Seth propellers of Germany because they are the only one with my specs . but I still have time for this.

As the build goes forward Barrie , don't be shy to offer any suggestions, this is what this thread is all about ....

Roger
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Last edited by forgues research; 02-08-2013 at 05:31 PM.
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Old 06-09-2009, 08:51 AM   #7
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Default Re: 40% Turbo Laser (scratch built)

Quote: Originally Posted by jaguar bone
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Subscribed!
You never know what Roger may fabricate in his shop for himself next!
(Did you get my e mail last Thursday? I do see you've been quite busy! I understand too if your back burners are on simmer. No real rush.)

brusty- - Wow some Raven! That plane in your avatar really looks BA!

You're too kind and yes I did get you're email , I will get back to you within a day or two.
As for Brusty, this guy is a hell of a builder also, did you know he makes his own propellers also, and beautifull work he does...

Roger
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Old 06-09-2009, 09:23 AM   #8
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Default Re: 40% Turbo Laser (scratch built)

Count me in.
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Old 06-09-2009, 11:41 AM   #9
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Default Re: 40% Turbo Laser (scratch built)

It will be the best flying plane you have ever had Roger. Its like flying a kite on a string.

Scott
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Old 06-09-2009, 11:50 AM   #10
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Default Re: 40% Turbo Laser (scratch built)

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It will be the best flying plane you have ever had Roger. Its like flying a kite on a string.

Scott
By the way the 34% flies, I think you are right, I was telling Jack yesterday, although just a few flights with ,this airplane , when I did a slow roll, it was the worst looking slow roll I have ever done, I found myself correcting as I do with my Sukoi, which of course I didn't need to, because the airplane is so neutral.
After only three 7 to 8 minute flights, I am hooked, this is by far the best flying airplane I have had, of course I am no Christophe paysant Leroux , or QQ by any means but I can tell the difference.

I am now wondering why there not more people flying this airplane? Probably because its not trendy or not what the big guys fly, its a well hidden secret....

And I forgot to mention , I am still using only 77 ounce Multiplex servos with plastic gears, but with the use of boost tabs, One per airlerons and one per elevator...

I will also use only one servo per aileron and elevators on the 40%, they will be a different servo only because I am running out of servos.

Roger
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Old 06-09-2009, 12:43 PM   #11
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Default Re: 40% Turbo Laser (scratch built)

Quote: Originally Posted by forgues research
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By the way the 34% flies, I think you are right, I was telling Jack yesterday, although just a few flights with ,this airplane , when I did a slow roll, it was the worst looking slow roll I have ever done, I found myself correcting as I do with my Sukoi, which of course I didn't need to, because the airplane is so neutral.
After only three 7 to 8 minute flights, I am hooked, this is by far the best flying airplane I have had, of course I am no Christophe paysant Leroux , or QQ by any means but I can tell the difference.

I am now wondering why there not more people flying this airplane? Probably because its not trendy or not what the big guys fly, its a well hidden secret....

And I forgot to mention , I am still using only 77 ounce Multiplex servos with plastic gears, but with the use of boost tabs, One per airlerons and one per elevator...

I will also use only one servo per aileron and elevators on the 40%, they will be a different servo only because I am running out of servos.

Roger
Hi Roger
Glad to see you are building the 40% Laser. Im guessing, with all the lite mods, that the final weight will be a lot less than 28#. My guess is 25-26#. The larger plane is easier to fly, and you will enjoy it also.
Regards
Jack
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Old 06-09-2009, 12:59 PM   #12
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Default Re: 40% Turbo Laser (scratch built)

What ever happened to the 35% Yak on a 80 with the cooling blade with boost tabs on the surfaces?
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Old 06-09-2009, 05:11 PM   #13
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Default Re: 40% Turbo Laser (scratch built)

Quote: Originally Posted by Cracky
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What ever happened to the 35% Yak on a 80 with the cooling blade with boost tabs on the surfaces?
You just awoke a sore spot in my heart,

I flew it only a few times , and I have to tell you, it flew better then expectations , using small servos with boost tabs and the cooling fan ran flawlessly.

But we have a tree that likes to stretch its limbs once in a while and usually

when you are not paying attention. so you guessed it, it has gone to model heaven

Roger
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Old 06-09-2009, 05:17 PM   #14
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Default Re: 40% Turbo Laser (scratch built)

Today, the weather sucks and had other things to do but I did manage to get into the shop, and get a bit of work done.

A lot of what I have learned building the 34% will find its way in the 40%. For instance, the small guide wire retainers I made for the other airplane will find its way here since they work perfectly but this time I have made the adjustment part out of aluminum instead of brass, cutting crucial tail weight down.

The cable I am using for the tail guide wires are of Kevlar (150 lbs)

I also made the foam cutting templates for the wings.

I was lazy on the photos today

Roger
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Old 06-09-2009, 07:28 PM   #15
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Default Re: 40% Turbo Laser (scratch built)

Quote: Originally Posted by forgues research
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You just awoke a sore spot in my heart,
So sorry to learn this horrific news Roger.

If we fly em...
If we don't fly em, why bother ??
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