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PNP Repair

A Reliable Repair adhesive for PNP fueslarge material

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Skippers Walker18/06/2020 06:17:01
74 forum posts
19 photos

Hi

Please can anyone recommend a tough reliable glue for effecting a repair to s PNP Volantex type fuselarge?

Thanks

SW

Denis Watkins18/06/2020 06:26:20
4655 forum posts
132 photos

UHU Por

Follow the instructions on the box

McG 696918/06/2020 07:27:12
avatar
3450 forum posts
1317 photos

Hi SW,

Apols but I tend to disagree, Denis.

UHU Por is a contact adhesive mainly used for foam parts and will be totally ineffective with the Volantex PP fuselage.

PP (Polypropylene) is a 'semi-hard' but very strong plastic.similar to the one used for making for example milk bottles or chemical products containers.

Perfect for 'blow moulding' and that's how the Volantex fuselages (Trainstar, Raptor, V2 or FPV Ranger) are made.

PA, Epoxy and other glues will 'stick' to it but will peel right away off when set...

The only way to 'glue' it is to dissolve the surface layer and then to use a plastics cyanoacrylate to bond it.

If you can't find a retail packaging blister combining the two products, contact your local Loctite agent and ask for 707 (polyolefin primer) and some 406 (instant plastics adhesive). Works a threat...

Loctite 770 - 406

Hope this helps

Cheers

Chris

Doctor Chinnery18/06/2020 08:45:28
86 forum posts

I had a German sailplane kit back in the 80s (can't remember name of the manufacturer - but probably now defunct) - but it came with a lovely blow mounded fuselage, the manufacturer advised you to glue servo tray etc to the silky smooth plastic with Stabilit Express - it worked too. The only proviso being that you needed good ventilation - it smelled vile!!! The pong is due to the methylmethacrilate (liquid) which is mixed with the accompanying powder to make a paste.

Don't confuse it with Ponal Express, which is a quick drying white glue. Bye the bye - does anyone use Ponal Express? My only reservation with a quick drying white glue would be whether it would have time to penetrate the apposing balsa surfaces adequately before it "went off", to provide as strong a joint as with traditional slower drying white glues.

jrman18/06/2020 09:06:27
423 forum posts
3 photos

Deluxe Materials do a "primer" and cyano for hard to glue plastics.

Peter Christy18/06/2020 09:41:45
1921 forum posts

Re: Stabilit Express - This is certainly excellent glue, but expensive and not easy to find nowadays. I came across it as the recommended glue for building the gearboxes on early Schluter helicopters. It was also recommended for fitting the wooden parts into the fibre-glass fuselages.

I've recently been re-building some old Schluters, and for the gearboxes they now recommend UHU Plus Endfest 300. This is a lot cheaper and more readily available than Stabilit Express.

Endfest 300 is an epoxy glue. Another option might be Uhu Plus Acrylit Express. This is more like Stabilit Express, with one part being powder. From the name, it seems to be some sort of acrylic rather than epoxy, but as all the literature is only in German, French and Italian, I can't be sure! I can make out that it is recommended for metal, porcelain, acrylic, glass, polystyrene, and polycarbonate - amongst others that I don't recognise!

One or the other ought to work!

--

Pete

Skippers Walker18/06/2020 13:33:48
74 forum posts
19 photos

Thanks folks for all your information and advice. I'll try and choose the correct adhesive carefully.... it's a mine field!

Cheers

Chris

MattyB18/06/2020 17:10:48
avatar
2383 forum posts
45 photos

I used that on a plastic Graupner Cherry back in the early 90s - brilliant stuff but very expensive even back then. It was stronger than the fuselage, which went very brittle in the cold (not ideal for a slope soarer used in the UK...!) and cracked into loads of pieces on a relatively innocuous landing. Every bond using Stabilit was intact, the rest of it not so good...

Skippers Walker19/06/2020 13:27:04
74 forum posts
19 photos

PNP/ABS Repair: I've just received a response from "Deluxe Materials" regarding the adhesive query raised earlier in this Forum. Just for information I offer the following information-

Quote ;

"Chris if its ABS and you need

  • Fusion if it needs gap filing
  • SuperCrylic if it does not

Just check with the maker."

McG 696919/06/2020 14:03:41
avatar
3450 forum posts
1317 photos

... I'm a big fan of Deluxe Materials's products.

... but the Volantex fuselages - as are most of the German vintage slope soarers (Graupner & Robbe) are made of PP (Polypropylene) and NOT ABS...

Cheers

Chris

jrman19/06/2020 15:24:21
423 forum posts
3 photos

Deluxe Materials list "TRICKY STICK" as a primer on Polypropylene before bonding with cyano. I'm surprised they didn't mention their own product unless you told them it was ABS.

Edited By jrman on 19/06/2020 15:27:19

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