SCEET - 8

[facthunter]

Why did you expect it to?  IF it did it would  not do the Job. Thats also why it won't bend so easily. Maybe required bends may be done  to order, as it is with rubber.  It's an entirely different product

[turboplanner]

 

[kgwilson]

I bought mine (No 9 Sceet) from an automotive supplier in Sydney via Ebay. It cost $45.00 for a metre length & came doubled over to fit in a half metre box so 180 deg bends are easily done.

[facthunter]

Depends on the diameter. It stands to reason it won't bend as easily as the other. Nev

[skippydiesel]

I only need about 30-40 mm flexible (must not transmit any load/restricton on the carb) straight (no bends) ducts between my air box & carburettor flange.

 

Despite my hope, the SCEET does not seem to be the right choice for the job.

 

Suggestions welcome.😈

[facthunter]

Rough inner surface WILL affect flow. There was a laminated aluminium and cardboard product  available for Auto use which is durable and heat proof you might try.   Easily bent to a semi permanent shape. Nev

Edited Saturday at 11:44 PM by facthunter

[Blueadventures]

Best way to cut that spring steel is a small cut off wheel; Dremel or similar.   100mm with care and 1mm wheel.  Used all in the past.  Then dress the cut end of wire for craftmanship.  

[onetrack]

You can also get small (1-1/2" or 38mm) cut-off wheels that fit the Dremel electric rotary tool, or that fit air-operated cut-off tools (they're like a pencil grinder, but have a cut-off disc and guard fitted instead).

The small air-operated cut-off tools normally use a 3" (75mm) disc, but you can use the 38mm cut-off wheels on them for close-quarter work.

 

However - for a hose distance of 30-40mm, you wouldn't need spiral-wire reinforced hose. Fuel-resistant, un-reinforced hose would be quite adequate. I'd look at using a length of silicone intake hose - it's very durable.

 

https://autopro.com.au/ap/Autopro-Category/Performance-Parts/Induction-%26-Fuel/Silicone-Hose/c/524

[kgwilson]

Sceet/Scat is what silicone flexible air ducting (1 or 2 ply) hose is known as in the Aviation industry. Specs are identical as are the temperature ratings but price from aviation suppliers is more than double. the sceet or 2 ply has higher temperature ratings -60c to +300c compared to -50c to +250c.

[skippydiesel]

Most of the silicon hose/ducting, I have found on the net, is quite heavy & thick - aimed at intercooling & the like. 

 

I specifically need, lightweight, good hear/fuel resistance & as flexible as possible so as not to impact on the carburettor being able to move/absorb vibration.

 

I may have to use SCAT with the coil removed.

 

I have written to a lay flat fuel hose supplier that has the necessary 51 mm(2") ID hose which may be suitable.

 

In the meantime I have some Gates, automotive, aluminium, concertina ducting that will do the job for a while (longer?)😈

Edited Sunday at 02:51 AM by skippydiesel

[onetrack]

The Poms have a high quality fuel filler neck hose which may suit your needs. I'm not sure if there's an Australian supplier, it's made by AP Automotive, and it's reinforced with a light steel mesh, not a spring wire.

Maybe one of the U.K.-based lads on here, such as Red, has experience or knowledge of this product.

 

QUOTE: (from website)

"EPDM Fuel Filler Neck Flexible Hose is typically constructed of multiple layers of high-quality EPDM (Ethylene Propylene Diene Monomer) rubber material. The EPDM rubber provides excellent resistance to heat, ozone, and weathering, making it ideal for use in harsh environments.

The inner layer of the hose is designed to be fuel-resistant and compatible with a variety of fuels, including gasoline, diesel, and biofuels. The middle layer of the hose is reinforced with wire mesh layer, which provides additional strength and flexibility. The outer layer of the hose is also made of EPDM rubber and is designed to provide additional protection against weathering and abrasion."

 

51mm Rubber Fuel Filler Neck Hose - 1/2 Metre

WWW.AUTOSILICONEHOSES.COM

---

Application: Fuel Filler Reinforcement: Textile & Wire Temperature: -40°C to +150°C Material: EPDM Fuel Resistant DOWNLOAD DATA SHEET VIEW FULL RANGE BUY IN BULK

 

Edited Sunday at 03:26 AM by onetrack

[facthunter]

Does the Airbox move with the engine?. IF it doesn't you will need great flexibility as the distance is short  That means neoprene  and maybe go to a bigger diameter if flow concerns you. Use bellows type.  Nev

[skippydiesel]

Saved by another pilot.

 

Called in to the Sydney Recreational Flying Club, on the way to my Sonex - mentioned the need for small amount of 2" (51mm) ID SCAT. A member & gentleman,  said he had he had some unused pieces I could have,  he drove drove off, returning an hour later with the stuff. How good is that???

 

I used the donated SCAT, minus wire, to make two short (35mm) cuffs. Fitted perfectly to airbox/carbs, with a small amount of slack in middle for movement  & secured with nice thin hose clamps - job almost done. Looking good. Will finish off during the week & go fly.

 

My thanks, to all those who made suggestions/gave advice😈

Edited Sunday at 10:09 AM by skippydiesel

[Thruster88]

Skippy, without the inner wire the scat hose will most likely collapse, I realise the very short length won't allow a complete collapse. 

[Moneybox]

On 26/01/2025 at 6:08 PM, skippydiesel said:

Saved by another pilot.

 

Called in to the Sydney Recreational Flying Club, on the way to my Sonex - mentioned the need for small amount of 2" (51mm) ID SCAT. A member & gentleman,  said he had he had some unused pieces I could have,  he drove drove off, returning an hour later with the stuff. How good is that???

 

I used the donated SCAT, minus wire, to make two short (35mm) cuffs. Fitted perfectly to airbox/carbs, with a small amount of slack in middle for movement  & secured with nice thin hose clamps - job almost done. Looking good. Will finish off during the week & go fly.

 

My thanks, to all those who made suggestions/gave advice😈

 

Skippy, I have a box of various sizes somewhere but it would be quite old. I saw it recently when we moved a load from Capel to Cue (our sea change). If what you have doesn't work out I'll find it when I get home. We're on the road at the moment, 750km trip, going to move Ripper 10km out to the main road for transport. We used to use this type of hose for AC ducting in the dashes of some RHD conversions. Got badly stung back in the 80's using it for aircleaner ducting on Hilux snorkel conversions. The dust was drawn in along the wire track and dusted a fleet of vehicle engines.

[facthunter]

Silicone to the rescue. Check for leaks with slight pressure applied and soapy water.  Nev

[skippydiesel]

Thanks All,

 

Air inlet/box/filter & new cuffs all installed. Test fly at earliest opportunity.

On 27/01/2025 at 12:41 PM, Thruster88 said:

Skippy, without the inner wire the scat hose will most likely collapse, I realise the very short length won't allow a complete collapse. 

Thanks Thruster - Gap between air box & carburettor flange less than 5mm. I don't anticipate any negative impact from hose being "sucket in" a little.

I have left a small fold in the cuff, at/in the above gap to facilitate relative movement.  Static testing (moving carb or airbox ) seems to indicate idea is working.

The previous cuff was 2" ID fuel hose, relatively  (to the SCAT, less wire) stiff/unyielding.😈

[Moneybox]

16 minutes ago, skippydiesel said:

Thanks All,

 

Air inlet/box/filter & new cuffs all installed. Test fly at earliest opportunity.

Thanks Thruster - Gap between air box & carburettor flange less than 5mm. I don't anticipate any negative impact from hose being "sucket in" a little.

I have left a small fold in the cuff, at/in the above gap to facilitate relative movement.  Static testing (moving carb or airbox ) seems to indicate idea is working.

The previous cuff was 2" ID fuel hose, relatively  (to the SCAT, less wire) stiff/unyielding.😈

Mine has that heavy reinforced rubber hose as well and the back of the airbox has one small rubber mount back to the engine mounting frame.

[Moneybox]

4 minutes ago, Moneybox said:

Mine has that heavy reinforced rubber hose as well and the back of the airbox has one small rubber mount back to the engine mounting frame.

No come to think of it, the back of the airbox is supported by a 6mm steel rod from the firewall up to the small rubber mount just giving it vertical support.

[facthunter]

OOOER!   Nev