Member postings for Stephen Smith 14

Pretty sure no one falls for these idiots anymore but just in case advertised on BMFA and got a reply from Darren Rowden. Normal thing will send cheque then send his shipper you know the score.

Sent him the following reply

The Bonneville did have a mechanical advance which was normally 12°. Usual formula for Triumph for timing was to double the auto advance range and subtract that from the maximum advance. In the case of the bonneville the timing was 38° so 38-24=14 which would be the static timing.

38° at max advance for a four stroke of this era was not unusual but not a 2 stroke with or without advance.

The Bonneville had 2 sets of points one set mounted on a primary back plate and a second set on a secondary r back plate which in turn was mounted on the primary back plate. The idea was to adjust the timing on the secondary till it matched the primary then adjust the primary which adjusted the secondary with it till the timing was correct.

Not going to work it out but still a long way from 40°

Having raced 2 strokes in the late seventies and early eighties and having spent from 2005 to 2017 preparing race bikes both classic and a bit newer for my son I can assure you that there is no way that engine ran with 40° of advance regardless of state of tune.

However you are correct about the coralation between piton movement and degrees of crank movement much like servo push rods not giving linear movement from linear servo rotation, but would be no where near 40°.

2K lacquer sprayed but hold your breath then run outside

Not surprised it kicked back bultaco state ignition timing of 2.5-2.7 mm btdc with a 60mm stroke (they where quite a short stroke motor) 1mm would equate to 3° so 7.5°-8.1° btdc

Several taps on the table answers your own question

Would be great if it wasn't discontinued

Posted link above

**LINK**

Hope you paid with PayPal, never heard a good word about them.

Sorry don't know how to make links work so you will have to copy and paste

No qualifications required, any one can buy one and go fly. Good job Maplins went bust, if they had started selling them every Tom Dick and Harry would be flying over a retail park near you.

Ripmax part number P-14SG/BC is what you need. http://www.ripmax.com/Item.aspx?ItemID=P-14SG/BC

I have a super nova bought it at the nats must have been late 90s sat in the loft till end of 2016 when I had pneumonia. Had nothing to do sat about for 8 weeks so built it.

Flies really nicely with a 2 stroke sc108 have taken it to a ukcaa meeting but never flew it at one, but even though no one knew the model they where happy to let me fly it if I wanted to.

Not flown it for about a year now, might get it out Saturday and give it a go.

Been flying nearly 50 years and it just gets better things like large petrol jets and the radio we have now was just a dream, but hoping to fly more control line this year.

Have a hobbyking meliso not available any more but similar to a sebart miss wind think they just copied it very smooth and accurate, also have a hobbyking hyperbibe great flying chuck about plane will do all the 3D moves search hobbyKing 3D - Michael Wargo flies the Durafly HyperBipe

My favorite is scale a Goldberg Ultimate with a 20cc petrol in fact it's my favorite plane of all time, my second favorite was a Goldberg Ultimate with a SC108 sadly no longer with us.

Try rapidrc the film they sell is hobbyking just more expensive but still loads cheaper than ora cover, and fast delivery also nice to deal with

Sonny your wasting you time, this comes up time after time but still it doesn't sink in, maybe just maybe one day it will click in the mean time best I suppose we leave them to it and just have a little chuckle ever time it happens.

It will be Festo available from most of the jet shops