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Old 08-09-2016, 11:19 AM   #1
Hercplt
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LT 40 from Kit Plans??


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Long story short... I have a set of LT 40 plans from a kit that was already built... but no wood etc.

Has anyone been successful in scratch building from a kit plans?? Much of the fuslage is thin ply... etc...

Any ideas!?

Rich
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Old 08-09-2016, 12:13 PM   #2
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Re: LT 40 from Kit Plans??

I have used the kit plans before to rebuild my trainer back in the days.
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Old 08-09-2016, 12:54 PM   #3
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Re: LT 40 from Kit Plans??

25+ years ago I built a Kadet Sr from plans.
And that plane is still flying today.

In the original kit, the bulk of SR fuselage was built with 1/4" sq balsa. I did away with that and used the plans as a template to cut solid sheet fuselage sides using doorskin (with lightening holes). For the top and bottom aft of the wing saddle, I used the original deign callout for 1/4sq balsa. Forward of the wing saddle, I sheeted top and bottom also per plan. I don't think it turned out much heavier than the built-up design, and it sure was a lot more robust in the last 25 years.


The wings were built to plan as was the tail feathers. No problems encountered there.

PS- I'vs since converted the aircraft to electric. It flies even better now and I have no plans to ever retire it

If I were to do an LT 40 fuselage today, I would use the same principle and cut the sides out of doorskin. I would do top and bottom using balsa sheeting. The wings are pretty straight forward and I would just build that per plan.

Keep us informed. you should definitely turn this into a build thread
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Old 08-09-2016, 02:25 PM   #4
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Re: LT 40 from Kit Plans??

Quote:
Originally Posted by Hercplt View Post
Long story short... I have a set of LT 40 plans from a kit that was already built... but no wood etc.

Has anyone been successful in scratch building from a kit plans?? Much of the fuslage is thin ply... etc...

Any ideas!?

Rich
Can easily be done.

The down side is that by the time you purchase all the required wood and hardware, it costs as much if not more than just snagging a kit and building that.

However, if you've got some burning desire to do it that way, by all means do so.

As for door skin plywood to replace the light ply, last time I tried to source that I hit the brick wall of environmental issues. Seems that the mahogany of which it was made was banned from importation because of a claim of insect infestation which was harmful to native species. Was a time you could get the stuff anywhere.

If you were to build the LT-40 from plans, the lite ply could be replaced by balsa which would save a bunch of weight, resulting in a better flyer. That would not necessarily be weaker. Just look at the regular Kadet MKII which is balsa.
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Old 08-10-2016, 09:56 AM   #5
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Re: LT 40 from Kit Plans??

Quote:
Originally Posted by Hercplt View Post
Long story short... I have a set of LT 40 plans from a kit that was already built... but no wood etc.

Has anyone been successful in scratch building from a kit plans?? Much of the fuslage is thin ply... etc...

Any ideas!?

Rich
Ditto what others have already said.

Yes, people have been building from magazine plans for decades.

There is a rich backlog of free plans, information about materials, repurposing of materials from industry, building techniques, tools available online ..... check the various sections of rcgroups.com for "stickies" of saved information deemed to be general interest to future modelers.

If you don't see an answer in such reservoirs of information, then ask a specific question with detailed information about the problem you are dealing with.

From your post in the "newbies" category it appears you have the space and interest in fixing up donated models so getting into building from plans would see to be a logical path.

Huh? .... cheap, 1/8", 4'x8' Luan sheeting is no longer available; what is being used now for floor underlayment or inexpensive interior wall paneling?

good luck
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Old 08-11-2016, 06:38 AM   #6
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Re: LT 40 from Kit Plans??

Don't forget dollar store foam board. Light weight and surprisingly sturdy when used in the right way.
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Old 08-11-2016, 05:41 PM   #7
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Re: LT 40 from Kit Plans??

The Mahogany doorskin was a favorite building medium for me. And ya, I was sad when I found out that it was no longer available. But last time I needed more doorskin, I found and bought oak laminate doorskin. Its just a smidge thicker than doorskin, and its not much heavier.

I think its a great substitute, and I have used it for fuselage construction since.
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