ROL NEWS--New AMW K555 Skidmark Motor Certified by NAR

New AMW K555 Skidmark Motor Certified by NAR March 17, 2005 Web posted at: 12:37 PM EST

(ROL Newswire) -- The AMW K555 motor has been certified by NAR Standards & Testing for general use as a high power rocket motor effective December 21, 2004. It will not be certified for NAR contest use as it is not a model rocket motor.

The AMW K55 is a reloadable motor, certified only with the indicated size casings and manufacturer supplied nozzles, end closures, delays (or smoke devices), and propellant slugs.

Motor Details: Animal Motor Works: 54mm x 492mm (54-1750 casing): K555-SK-P (1300 Newton-seconds total impulse, 862.0 grams propellant mass) Propellant Key: SK = Skidmark propellant

Source: NNAR Standards & Testing

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K55...now that would be an interesting motor....not that you'd get much more than a 2:1 TTW ratio with the motor alone!

:-D

Reply to
Niall Oswald

We had a TRA certified 54mm SU K125FS for years.

Also had a K90 SU.

Jerry

Reply to
Jerry Irvine

Both of those would make a very good sustainer motor for a 2-stage rocket (minimum diameter) :)

Making a few assumptions, the K125 (I'm sure you can give exact numbers Jerry) can't have weighed anything more than about 2 kg, so with a suitably light rocket you'd probably be OK. Of course if the motor has a regressive thrust curve, the peak thrust may be much higher.

Reply to
Niall Oswald

The K125FS is pretty much unsuitable for a single motor, single stage rocket. Some were flown in SSR 2.7x45" for a university study. They were really marginal.

The K90 motor rocks hard in every way.

Both are 54mm SU motors.

Reply to
Jerry Irvine

I just wish they would certify a SK motor for the 75/3500 case! They have been jumping around all their engine sizes and keep missing the 75/3500. :-(

Doc

Reply to
Doc

Amen Doc!

Reply to
Tad Danley

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