I know the answers about putting the Gnome into a T motor are a joke,
but I think he meant to ask if there is such a motor as an F??-?T
(similar to the 1/4A3-3T) that he could put in his Gnome or modify the
Gnome so it would fit.
As the Gnome is a 13mm motor mount, I don't think there are any F class
motors that can be used in it. You could modify the Gnome so that the
motor mount is 24mm and there are a few F class motors in that size.
I would suggest talking with a local club as they can show you the size
of a common F size motor and the size of your Gnome.
Steve Vernon wrote:
The T at the end of the Estes motor names indicate that it is a 13mm
diameter motor. The largest available now is a full A. There are also 1/4A
and 1/2A in the same form factor.
If you are not talking about an Estes Gnome (which will only fit a 13mm
motor) you may get better responses if you let us know the make.
Aerotech makes 24mm, reloadable F motors. There is also a single use
F21 in the same size. The standard sizes of model rocket motors are 13mm,
18mm, 24mm, 29mm. Other sizes are available, but generally are considered
high power motors, with some probable exceptions in the 38mm range. Limits
on the propellant weight generally limit them to about 120Ns.
All motors that I know of that are F impulse or less are model rocket
motors and are available to pretty much anyone (minimum age restrictions at
the top end). Most G class motors are considered model rocket motors. Some
miss on one restriction or another (more than 62.5g of propellant or more
than 100N average thrust) and require either or both of a federal explosives
permit or NAR/Tripoli Level 1 certification for High Power Rocketry.
http://www.hobbylinc.com has reasonable prices on model rocket supplies.
Many (most?) local hobby shops also have motors for this sized rocket. F
size and up are more rare at hobby shops.
Western New York Sailplane and Electric Flyers
Are you aware of just how much power that is?
If you dont' even know where to buy F motors, there is no way your ready
for something like that.
(An S motor was used to reach space, to give you some idea.)
You can't buy anything bigger than O, and you need to be properly
certified to do that.
Check out tripoli.org or nar.org and check on the certification process. To
fly or buy an 'O' you must be level 3.
Level 1 - H and I
Level 2 -J,K,L
Level 3 - M and above
By the time you are certified to fly an O, you will know where you can get
an O, and also understand the BATFE requirements (well, as well as any of us
do), and also understand what's involved with the FAA.
The To100K project launched their full stack on Saturday afternoon
at Aero-PAC's Aeronaut launch in Black Rock, Nv. Lifted off on a Cesaroni
Two words for that motor...
Came to pressure instantly (just like all of Anthony's motors,) and
boosted the airframe dead straight up. An unfortunate problem with the
sustainer airframe terminated the flight early, but that O motor was a sight
to behold. Massive quantities of data were retrieved, and lessons were
learned from the flight. I understand the next attempt will be at XPRS Rx,
in September, and will use a Swamp Gas O-5000, staged to a Swamp Gas M1700.
Going to be pretty kool...
If you want to fly motors like that, do what the rest of us did...
Go buy an Estes Big Bertha and a pack of C6-5's, and work your way
up from there.
(Just so you know, I have a project that I designed that uses a 12"
diameter baby T motor to lift a 3" boosted dart at Mach 5.5. Projected
altitude... 77 miles. I think that's conservative. I don't think that the
sim programs know that there's no air above 62 miles, so they miscalculate
the total drag through the flight.)
So Evi, please stop tossing around remarks about T motors and the
like. If you don't know where to buy an F motor, you're not ready to go to
(See what happens guys... You give a kid a computer and a connection to the
internet, and they suffer brain fade. Sheesh...)
Go look at some news and an atlas please. The only folks lobbing stuff
across national borders around there at present are the Hezbollah from
Lebanon into Israel, and the Israelis are hefting ordnance via F15 into
The Iranians are not actually doing any lobbing of anything anywhere at
the moment, though supply of lobbing material is another story. If you
want to go down that route, then the Iranians and the US are both
involved as suppliers.
Graham J. Platt
graham (a) bowhunter (d) demon (d) co (d) uk
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