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Slec/Apache Chipmunk kit advice.

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john s21/07/2019 14:49:48
63 forum posts
2 photos

Hi,

I'm thinking about buying one of these kits, probably the RAF trainer version.

The main question I have is about the two piece wing, I've found some old build threads where people have abandoned the idea due to it being a flimsy and impractical arrangement and just glassed the the wing halves together, as I need it to be two piece can anyone tell me how they find it works for them.

john

David P Williams21/07/2019 15:45:44
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902 forum posts
309 photos

Been fine for me, although I was also a bit sceptical initially. It's not a model to be thrown around in high G manoevres anyway - lazy graceful aeros like the real thing.

Tim Flyer21/07/2019 16:57:02
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1271 forum posts
234 photos

I will be interested to hear about this too as I bought the RAF trainer version from SLEC last month and it’s my next project after I finish my smaller Slingsby Swallow glider .

john s21/07/2019 18:33:05
63 forum posts
2 photos

That's good to read David, I'm pretty well sold on one now just have to decide which version to go for.

I looked at the photos in your collection and particularly liked the elevator trim tab and u/c legs, nice work!

john

David P Williams21/07/2019 18:50:29
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902 forum posts
309 photos

Thanks John. I had one of the first kits from SLEC so had a few teething problems, but I'm sure you'll be OK. My plan was stretched by nearly 20mm compared to the cut parts - just go with the cut parts and you'll be fine. It flies really nicely, even though mine is heavy because of all the detail I added it still has a very soft stall and lands at walking speed with full flaps. No dramas.

john s21/07/2019 19:36:59
63 forum posts
2 photos

That's even better! Its flight handling is praised in almost every build thread I've read and is a big plus for me.

ASH.21/07/2019 21:00:07
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334 forum posts

My Apache Chipmunk has a one piece wing and I can just about shoehorn it in into my saloon car, The fuselage is quite large too but it all fits in okay.

I was just thinking - perhaps when Tim gets his Chippy made,(which shouldn't take too long knowing his build speed) we could all get together for 3 ship (or more) formation flying! It would be spectacular seeing a number of fifth scale Chipmunks all flying together at scale speed. And who knows maybe we could put on a display at W&W's..And have Slec sponsor us laugh

David, what servos' are you using in yours, and what engine?

David P Williams22/07/2019 09:32:34
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902 forum posts
309 photos

Hi ASH - I think it has Hitec HS325HB in the wings and 5485HB on elevator and rudder. It's a Laser 150 up front - lovely. Only problem was getting the tank height right.

john s22/07/2019 17:37:31
63 forum posts
2 photos

I phoned Slec this afternoon to ask a few questions about these kits, and they could not have been more pleasant and helpful.

Found a very informative build thread on RCU well worth a look if if you haven't seen it already

**LINK**

Still humming and harring smiley

Edited By john s on 22/07/2019 17:41:38

David P Williams22/07/2019 17:55:24
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902 forum posts
309 photos

John - a lot of that thread is quite old, and refers to the old Apache Aviation kit. SLEC did quite a bit of re-design so some of the problems reported have been sorted out on the new kits

Tim Flyer22/07/2019 21:06:10
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1271 forum posts
234 photos

My Chipmunk will have my Laser 180 . I’m sure lots more than needed but as I gave it spare it’s going in . I probably want be able to make a start until later in August though . I used to have the smaller Blackhorse Chipmunk which I loved flying so this is my replacement (upgrade ! )😊

john s22/07/2019 21:44:05
63 forum posts
2 photos

Yes I guessed that was the case David but thought it quite good to get the general idea. I feel fine with the kit quality and am no longer concerned with the wing joining method, and it fits my car!!! So the only thing left to do is get the RAF trainer once I open my wallet, always the hard part!

Applewood10/11/2019 21:20:38
52 forum posts
3 photos
Posted by David P Williams on 22/07/2019 09:32:34:

Hi ASH - I think it has Hitec HS325HB in the wings and 5485HB on elevator and rudder. It's a Laser 150 up front - lovely. Only problem was getting the tank height right.

Hi David, I’ve read this in a couple of places about trouble getting the fuel tank height right for the laser 150 when inverted. Do you have any lessons you could pass on please? Mine is the raf trainer version, split wing, with laser 150 inverted. Just in the final stages before covering.

Also general question , does the 6mm landing gear wire hold up, or would it benefit from sprung oleos .

kind regards

steve

David P Williams12/11/2019 10:41:32
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902 forum posts
309 photos

Hi Steve,

I can't remember how I set the tank height initially. I think I set it as low as I easily could, but knew it was slightly high in relation to the Laser carb. First few flights, the engine ran fine on the ground, and for the first few circuits, then it would die back to idle and not throttle up.

After lots of headscratching and communication with Jon at Laser, I carried out some surgery to the front and lowerd the tank as much as I could - about a further 20mm from memory. The engine runs perfectly now and I think the centre line of the tank is pretty much level with the carb spraybar.

I used the top of the landing gear, fitted as plan, but cut off to stubs, with home-brewed oleos clamped to them. They seem to hold up OK, but it flies so nicely down to almost walking speed with flaps that it's easy to do greaser landings (almost) every time.

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