# AT or CTI?

## AT or CTI?

• ### CTI

Results are only viewable after voting.

Which one?

#### Rocketjoe13

##### Certified L2
Both. My favorite motor - the one I just flew. Next favorite - the one I'm about to fly.

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#### TRFfan

##### Well-Known Member
I like CTI, first of all because its in canada so motors are more readily avalible here and second of all because its propellant formulations are better and they have better motors.

#### DavidMcCann

##### Well-Known Member
I like CTI, first of all because its in canada so motors are more readily avalible here and second of all because its propellant formulations are better and they have better motors.
I would be interested to know how many of each companies motors you flew to arrive at this conclusion.

Personally I fly all of them, CTI, AT and Loki. Current favorite motor is the Loki K1127 Thats about to change to the Loki M2550 . I also love Aerotech's 29/240 and 360 loads. all very cool and most ship non hazmat. The H268R is tons of fun. And it's hard to argue with liking motors like CTI's O3400.

#### TRFfan

##### Well-Known Member
My favorite motor is the CTI G150. Alot of fun in a small packet.

#### rharshberger

##### Well-Known Member
I would be interested to know how many of each companies motors you flew to arrive at this conclusion.

Personally I fly all of them, CTI, AT and Loki. Current favorite motor is the Loki K1127 Thats about to change to the Loki M2550 . I also love Aerotech's 29/240 and 360 loads. all very cool and most ship non hazmat. The H268R is tons of fun. And it's hard to argue with liking motors like CTI's O3400.
+1 David, each manufacturer has great choices in motors. I don't believe CTI has better motors/formulas than AT just different ones. AT chose to go one way with hardware and assembly CTI another and Loki yet another, none is "better" but people do have preferences.

#### TRFfan

##### Well-Known Member
Well CTI is better in preformance, their C* and Imax are really high impulse formulas.

#### rharshberger

##### Well-Known Member
Well CTI is better in preformance, their C* and Imax are really high impulse formulas.
My favorite motor is the CTI G150. Alot of fun in a small packet.
I like CTI, first of all because its in canada so motors are more readily avalible here and second of all because its propellant formulations are better and they have better motors.
Which one?
If you already were set on one brand why ask the question in your first post. It could be considered "trolling".

#### TRFfan

##### Well-Known Member
I want to know what other people think, thats called a "question".

#### ksaves2

+1 David, each manufacturer has great choices in motors. I don't believe CTI has better motors/formulas than AT just different ones. AT chose to go one way with hardware and assembly CTI another and Loki yet another, none is "better" but people do have preferences.
Ditto here. Nothing against CTI it's just that I have other hardware although I don't mind doing small stuff. With smaller trackers I could do some of the multigrain 24mm CTI hardware and motors. I'm more like Rocketjoe 13 in #2 above. Kurt

#### Rex R

##### LV2
to answer the op question, yes.
Rex

#### markkoelsch

##### Well-Known Member
I like CTI, first of all because its in canada so motors are more readily avalible here and second of all because its propellant formulations are better and they have better motors.
How do you quantify better?

I understand your supply situation, and certainly appreciate that. That said, it does make it better.

If you are looking for a particular load in a certain size, specifically 24mm then I would generally agree to the CTI lineup wins there based on diversity etc.

Beyond that, I think the assessment is much more complicated as there are options. It depends on what you are after.

My favorite propellant is AT Mojave Green. One of the better isp propellants out there. As a matter of fact, I first chose to fly an I245 MG not based on it being green, but based on thrust curve and total impulse for that sized case. That the flame looks awesome is secondary to me, but it is really an excellent green. Then I flew a K805 MG, and that is my favorite motor now.

#### qquake2k

##### Captain Low-N-Slow
AT just because they're more accessible to me.

#### Cabernut

##### Well-Known Member
CTI/AT: either, neither or both. Or Estes. I use whatever is best suited for the specific rocket+field conditions+desired flight profile.

I can get CTI reloads close enough to pick up so shipping isn't an issue. That's a factor. But otherwise it doesn't matter to me anymore which manufacturer.

#### DavidMcCann

##### Well-Known Member
Well CTI is better in preformance, their C* and Imax are really high impulse formulas.
Performance is highly subjective. Each rocket and set of goals will require something different. CTI has some great motors and formulas, but I don't think a generalized "better" is accurate.

#### markkoelsch

##### Well-Known Member
I agree that C* is impressive on paper. It is also a hot propellant, and I have seen a few go boom. The biggest boom was my failed L3 attempt on an M1830 C Star. Beautiful off the pad- 26 pounds with motor and hauling. For about a second, and then the liner failed...

#### blackbrandt

##### That Darn College Student
How do you edit a poll?
Sadly, you can't. Just letting you know that there is a third choice

#### dixontj93060

##### Well-Known Member
Typical for me: 1) Loki, 2) AT, 3) Cesaroni (distant third).