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Post  Michpatriot Wed Feb 08, 2023 1:04 am

Well I fired up the combat kitten on bladder.. With the postage stamp fine thread needle 1/4 turn off seat= superflood.. 1/8 turn off seat still too rich..almost closed starts to gain RPM but then becomes erratic and dies. The Teedee never acted like this..It likes 20 or so clicks off seat with the same bladder setup..Hmmm.wonder if I have a buggered up needle and seat? Or a bum reed?Stamp on bladder..needle problem  16758110
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Post  Michpatriot Wed Feb 08, 2023 1:19 am

Are these normally so blunt on a fine thread needle?Stamp on bladder..needle problem  16758111
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Post  HalfaDave Wed Feb 08, 2023 1:46 am

Hi Mich,

I pulled out the needles on two good running backplate .049s

Definately sharper than your photo. Yours looks shorter.

Send me your address, can do the post office tomorrow...

Dave

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Post  Michpatriot Wed Feb 08, 2023 1:53 am

Wow you are something else!!! PM inbound!
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Post  HalfaDave Wed Feb 08, 2023 6:45 am

Hi Mich,
Message received.
Found a postage stamp backplate NV too. Looks sharper/pointier than your photo.
Both should work.
Should be there in a few days...
Dave
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Post  944_Jim Wed Feb 08, 2023 3:02 pm

Mitch,
Where did you get the 90-degree barbs, and for what purpose are they originally marketed for?

I have an English-man's Radian with exposed fuel line (in the typical British fashion). I suspect the fuel line gets kinked making the turn from tank, and into the cowl while in flight. Your hard 90s may fix the suspected kinks.
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Post  andrew Wed Feb 08, 2023 8:38 pm

944_Jim wrote:Mitch,
Where did you get the 90-degree barbs, and for what purpose are they originally marketed for?
..............

You might wander around here:
US Plastics tube fittings
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Post  ffkiwi Wed Feb 08, 2023 10:18 pm

944_Jim wrote:Mitch,
Where did you get the 90-degree barbs, and for what purpose are they originally marketed for?

I have an English-man's Radian with exposed fuel line (in the typical British fashion). I suspect the fuel line gets kinked making the turn from tank, and into the cowl while in flight. Your hard 90s may fix the suspected kinks.

Jim-take a look here....and they're in the US as well [makes life easy from your perspective...if not from mine...!]

https://www.fourmostproducts.com/our-products/fuel-fittings/

I can testify that they're very handy to have lying around in both the workshop and field box....especially the 'small fittings' set.......they also make a rather nice streamlined 049 engine mount as well... https://www.fourmostproducts.com/our-products/engine-mounts/

ChrisM
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Post  GallopingGhostler Wed Feb 08, 2023 10:35 pm

Thanks for the link, Chris, I didn't know they still made the fuel cutoff module and streamlined .049 and .40 engine mounts. Back in the late 1960's to 1970's, full house radio systems were expensive. The fuel cutoff was useful for someone who had a one or 2 channel radio. By giving extreme control (down elevator or for single channel, extreme rudder opposite the one used for spiral diving), allowed one to cut flight short by cutting off the fuel supply on a non-R/C engine.
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Post  ffkiwi Wed Feb 08, 2023 10:43 pm

GallopingGhostler wrote:Thanks for the link, Chris, I didn't know they still made the fuel cutoff module and streamlined .049 and .40 engine mounts. Back in the late 1960's to 1970's, full house radio systems were expensive. The fuel cutoff was useful for someone who had a one or 2 channel radio. By giving extreme control (down elevator or for single channel, extreme rudder opposite the one used for spiral diving), allowed one to cut flight short by cutting off the fuel supply on a non-R/C engine.

Yes George-I recall that shutoff unit...never got around to purchasing one, as we found the same result could be achieved by a flexible fuel line, and a 'noose' round the fuel line attached to the elevator servo-which worked just as well....a bit like CL racers with their shutoffs-where a quick 'blip' of down elevator triggers the mechanical cutoff.  Of course now postage from the US to NZ is prohibitive...so many of the useful things have to wait until I feel like placing a sizable mass order with any particular supplier....     Rather ironically -slowly getting into a bit of peripheral CL late in life, I find I may now have to make some of those mechanical shutoffs...

ChrisM
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