Well, sodium and magnesium are out; they produce hydrogen. Actually,
anything with fuming sulfuric acid is unlikely to be stable "for an
indefinite period of time", and it's certainly not safe. I had one
minor scar from a spatter of fuming sulfuric in undergrad, and that was
quite enough.
Best -- Terry
On 7/26/2019 2:24 PM, Henry Vanderbilt wrote:
From the patent: "Examples of the suitable chemical substances are given, among them sulphuric acid, sulphuric acid plus sulphur trioxide, sodium, magnesium; sulphuric acid plus sulphur trioxide may be discharged into a solution of water in ammonia."--
On 7/26/2019 10:43 AM, Bruno Berger SPL wrote:
What did you expect? All the reactants are described in the patent (If
you download the original document (Link on the upper left))
Bruno
Am 26.07.2019 um 19:26 schrieb John's AOL (Redacted sender jkraieski for
DMARC):
Super, thanks. Not what I expected but very interesting :)"At that time [1909] the chief engineer was almost always the chief test pilot as
Sent from my iPhone
On Jul 26, 2019, at 1:19 PM, Bruno Berger SPL<mailinglists@xxxxxx> wrote:
A patent research is always a good source...
https://worldwide.espacenet.com/publicationDetails/biblio?locale=en_EP&II=0&date=19660727&CC=GB&NR=1037595A&ND=3&KC=A&rnd=1564161475298&adjacent=true&FT=D#
Bruno
Am 26.07.2019 um 16:50 schrieb (Redacted sender jkraieski for DMARC):
Yes I have that report and like you there was never a followup report
or discussion of the reactants :(
-----Original Message-----
From: DH Barr<dhbarr@xxxxxxxxx>
To: arocket<arocket@xxxxxxxxxxxxx>
Sent: Fri, Jul 26, 2019 10:46 am
Subject: [AR] Re: Exothermic Heating of Water
Partel, G., Laurienzo, P., and Diamantini, F., "An Italian Approach to
Reusable Low-Cost Rockets," SAE Technical Paper 670386, 1967,
https://doi.org/10.4271/670386.
Apparently it was a salt of some kind ? At a glance I don't find
further articles by any of the three authors.
On Fri, Jul 26, 2019 at 9:27 AM Redacted sender jkraieski for DMARC
<dmarc-noreply@xxxxxxxxxxxxx <mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:
First I will give you my background. I am a retired Manufacturing
Engineer who has been out of the rocketry scene for over 20 years.
I was a member of Tripoli in the past and flew up to and including
M size motors. I also built a monopropellant engine for static testing
back in the day. My passion however, has always been to build a
hot water/steam powered engine which I now intend to complete.
What I am looking for is a “chemist” who can figure out what
chemical(s) were used by Glauco Partel of Italy, who in the late
1960s for
his Grillo 1 and Grillo 2 rockets which used an exothermic
reaction to “instantly” heat the water to approx 600 deg F. Below
are his
statedparameters from his published report:
1. Rapidity of use (the chemical reaction is fully developed
within 0.3 sec)
2. Efflux independent of the production of energy (the
controls for the
reaction and the efflux are independent, one from the
other)
3. No need for any ground equipment
4. The prepackaged, loaded engine can be stored for an
indefinite period
of time
5. No need for any insulation of the engine walls
6. Outstanding reliability and safety in use
7. Low operating temperature (about 600 F)
8. No gas, such as hydrogen, is produced
9. The reaction takes place in the water and generates a
reaction product
entirely soluble in water.
To me, this sounds like unobtainium but he did publish a report
with those specs and flew two
rather large rockets.
Regards - John
well. That had the fortunate result of eliminating poor engineering early in
aviation" (Igor Sikorsky)
