KR-2S aircraft build advice (Port Elizabeth)

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caliber
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KR-2S aircraft build advice (Port Elizabeth)

Unread post by caliber » Thu Nov 01, 2018 6:05 pm

So my brother and I recently picked up a partially built KR-2S project. We're intending/hoping to complete it over time.

We have a well equipped word workshop and we're both competent wood workers, my brother also fixes motorcycles as a part time/side thing, and we both have a good understanding of electrics and electronics, I mean more than wiring a plug. :P I don't intend to blow my own trumpet so to speak, just saying we're reasonably practical. :)

That said, we have obviously never built an aircraft before and so we're no doubt liable to make all kinds of mistakes along the way. I'm also not sure about all the legal requirements, I know there's a need for some kind of build inspections but I have no idea at what points these are needed or who does them.

So just wondering if there's any guide/primer/resource available to give some clues on this? Or even better any experienced builders in PE who we could (or should) talk to?

Thanks.
Last edited by caliber on Mon Nov 05, 2018 6:11 pm, edited 1 time in total.
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Re: Aircraft build advice (Port Elizabeth)

Unread post by bluboyz » Thu Nov 01, 2018 10:06 pm

G’day Caliber,

Tell us more about your partially built KR-2S project you picked up..

Here are a few handy resources to start with:~

KRnet website ~
http://www.krnet.org/info.html
http://www.krnet.org/
http://www.n56ml.com/kopinion.html#reality

The EAA hints for home builders videos ~ (freely available)
https://www.eaa.org/en/eaa/aviation-com ... mebuilders

The FAA site, Down load the FAA AC 43.13-1B pdf, etc ~
https://www.faa.gov/regulations_policie ... ntID/99861
Download~
http://www.faa.gov/documentLibrary/medi ... w-chg1.pdf
W&B handbook down load ~
https://www.faa.gov/regulations_policie ... 8083-1.pdf

The Aero Electric Connection, down load pdf ~
http://www.aeroelectric.com/Catalog/pub/pub.html
http://www.aeroelectric.com/Book/AEC_R12A.pdf

Some Books ~ cheaper if you can locate these 2nd hand or in PDF format ~
http://www.liming.org/ch801/tools.html
https://www.eaa.org/en/eaa-shop/homebui ... s-set-of-4

Cheers, :D
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Re: Aircraft build advice (Port Elizabeth)

Unread post by caliber » Fri Nov 02, 2018 7:20 pm

Thanks! I'll post some pictures of the project when I get a chance to take some this weekend.
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Re: Aircraft build advice (Port Elizabeth)

Unread post by caliber » Mon Nov 05, 2018 6:10 pm

Here's a few pics I took of what we basically have to start with, there's also a box with a bunch of instruments and various bits (front wheel and so on) which I didn't take pics of. Not the best pics, bit hard getting good pics in the workshop.
I may be completely wrong but my impression is that the original builder started building a KR-2 and later switched to a KR-2S, there's drawings and a build manual for a KR-2 and then a bunch of "supplemental" KR-2S drawings (but no manual). It appears the wings still need additional extensions built (I mean apart from the tips).
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by JvTonder » Wed Nov 07, 2018 4:51 pm

Did you get a build number with it and has all the current work been signed off to date? If not first get an AP to come and inspect it. I suspect there might be some pitfalls waiting for you if the build was changed mid build and CAA "hates" when you deviate from the plans, unless Ken Rand designed it so that one could "upgrade" your KR2 to a KR2S.
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by caliber » Wed Nov 07, 2018 6:36 pm

It has no build number, we still need to get that seen to, was kinda hoping someone here would know who we can to speak to in PE for assistance with getting that done and stuff signed off and so on.
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by FlyKR » Thu Nov 08, 2018 10:06 pm

Russel Phillips may be able to help you with inspections his in PE. He is here on Avcom.
Best register the project with CAA and apply for a build number, you may need the plans serial number for this.
keep it simple and light and it will fly well and don't deviate from the plans by modifying the structure there's no need to.
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by caliber » Fri Nov 09, 2018 11:30 am

Thanks FlyKR, we'll try contact him and see if he can help or direct us..

Not to worry, we have no intentions of modifying things. :) We do have a serial number from the plans - two actually, there's one to be used for building a KR-2 and one for KR-2S - so we're ok on that area.
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by winona » Sat Aug 24, 2019 4:17 pm

Good luck guys...welcome to the fold...

Just be wary of the weight of that engine's effect on CG..its quite critical on these craft...
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by Chalkie » Sun Aug 25, 2019 8:25 am

The best advice Re: the KR2 in PE is undoubtedly Proff/Dr. Russell Phillips so to contact him, go to the Whisper Aircraft type thread, he designed those aircraft. Back in the days at Grand Central Russell built and flew his own KR2, so he is the right guy.

If that dried out masking tape is stuck to the Plexiglas then be very careful taking it off, you will need a solvent to soften the masking tape, but one which does not attack the Plexiglas. Once clean, tape up the outer edge with electricians plastic tape, then paint Ponal (or similar) cold wood glue onto the Plexiglas. You need to apply 4 or 5 layers, then when the time comes to remove it. It peels off like a plastic sheet.

As others have said, build a KR2 light and it will be a delight to fly. Build it heavy and it can become difficult to fly. So in my opinion, the re-drive should go in the bin, Turn the engine around and stick to advice given by Russell. As Burt Rutan would say: If you want to fit something to your aircraft... throw it up. If it comes down; it is too heavy.
Rule #2 Hurry up Slowly.
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by ACE MAN » Sun Aug 25, 2019 8:43 am

Plus Russell is busy with a KR2(or KR1?) right now AFAIK!
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Re: KR-2S aircraft build advice (Port Elizabeth)

Unread post by caliber » Sun Aug 25, 2019 12:28 pm

Thanks guys, we did get hold of Russell and got some solid advice from him, he even came and looked at what we have.
Chalkie wrote:
Sun Aug 25, 2019 8:25 am
If that dried out masking tape is stuck to the Plexiglas then be very careful taking it off, you will need a solvent to soften the masking tape, but one which does not attack the Plexiglas. Once clean, tape up the outer edge with electricians plastic tape, then paint Ponal (or similar) cold wood glue onto the Plexiglas. You need to apply 4 or 5 layers, then when the time comes to remove it. It peels off like a plastic sheet.
This was one of the things he told us too, we have since done this with wood glue. :D
ACE MAN wrote:
Sun Aug 25, 2019 8:43 am
Plus Russell is busy with a KR2(or KR1?) right now AFAIK!
Yes indeed he's building a KR1, at his invitation we visited his workshop some months ago and got to see his progress and lots of building advice. :)

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