RunRyder - RAPTOR 90 Problems with tank using backpressure

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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 90 Problems with tank using backpressure

Arild Johansen
Heliman
Location: Norway, Flateby

I just started to breaking in my new OS 91 SZ with Cline carb and backpressure. After a few flight I see the tank is worn in this area of my Raptor 90 (it’s not a photo of the actual engine neither the worn tank):

Does someone had similar problem with a pressurize tank in Raptor 90? And if so is there a good solution for that? I have tried to sand the frame in the actual area to get rid og sharp edges where the tank is worn but that didn’t help. I’m considering using double sided tape (like the one I use for my gyro) to isolate the tank from the side-frame. I’m in a little doubt if that is a good solution for my problem since both the tank and frame is soaked with oil after a couple of tanks. I think maybe the tape wouldn’t stay in the area where it’s suppose to be.

Arild Johansen

07-17-2008 10:07 AM

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rox33
Heliman
Location: Norway

I had kind of the same problem when I changed to Ys in my XeroG raptor conversion.
I used the famous "biltema's grønne" doublesided tape to fix the tank without having it rubbing against the frame...'

07-17-2008 11:14 AM

PietervA
Veteran
Location: New Zealand

My solution uses fuel tubing. A piece split longitudinally, and inserted along the frame edge, and a second length laid in the gutter on the inside of the strut support/tank holder. (This is the tubing in the L-shaped depression referred to by the others.)

The photo shows the edge protection, and a replacement for a missing grommet.

The inlaying is a bit tricky, as the tubing wants to spring out, so you need to be patient.

Double-sided tape tends to rub & fragment.

07-17-2008 11:27 AM

Arild Johansen
Heliman
Location: Norway, Flateby

Thanks both for fast reply!

It seems to be functional solutions both. I try the “Biltema’s Green” first and have some fuel tubing ready in my field-box.

Arild Johansen

07-17-2008 12:39 PM

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Billebob
Senior Heliman
Location: Tim-buck-2

You can also use ucut large gage silicone tubing between the aft plastic sideframe parts on the interior flat L-shaped recesses and the tank. This way it is nicely hidden from view

BB

I ain't buyin till I see it flyin.....talk is cheep

07-17-2008 04:27 PM

Andreas
Veteran
Location: Sweden

Hi!

I used an empty fuel can to cut pieces with the same size as the rear frames and placed them between the tank and the frames. Works perfect and you can't see them there either.

Regards,

Andreas

07-18-2008 09:20 AM

xcell1600
Heliman
Location: Bensenville, IL

I have wrapped the tank using packaging tank (has nylon threads)

This prevents the tank from ballooning.

07-18-2008 12:44 PM

Kinger
Elite Veteran
Location: Columbus, OH

Another vote for the fuel tubing within the L channel of the rear tank brackets. Works great and you can't see it in there.

07-18-2008 08:46 PM

AlanR8
Key Veteran
Location: Saddleworth near Manchester (UK)

R90 with YS 91 ST4.

Will be on my 3rd new tank as of tomorrow.

Alan
http://heliweb.co.uk
Raptor 90, YS 91 ST4, MP2. What a blast!

07-29-2008 12:10 AM

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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 90 Problems with tank using backpressure

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