CTI skidmark=AMW/Pro-X Skidmark?

[Wiley]

Hi guys! Since it is my job as a kid to ask information of less young and less stupid idividuals than myself, do any of you know if CTI's skidmark in their hardware is the same as the skidmark they sell in the AMW snap ring cases (AMW/Pro-X)? Pics of either are more than welcome!

[cbrarick]

Nope. A quick look at the CTI website will tell you they are different - the total impulse and average impulse are different.
http://www.pro38.com/products/pro54/motor.php

I've used CTI AMW/PROX for the 1400 case stuff and it's significantly different looking. Don't forget the snap ring cases take a reload that has square ends. CTI cases are rounded on the forward end.

They aren't cross certified (like some of the CTI is crossed for Aerotech) and I'd doubt they would fit well.

sorry no pictures, though.

rick

[Wiley]

Do you mean that the "regular" propellants are different, or the skidmark?

[cbrarick]

Well...you asked about skids, but I believe that they are all different.

[Wiley]

The skid in the 1400 case is a K610 right? Did it look anything like the pic of this K1000SK?: http://www.vernk.com/XPRS_2004_Photos.htm

[BsSmith]

The skid in the 1400 case is a K610 right? Did it look anything like the pic of this K1000SK?

No.

The smoke from the original AMW skid is a lot darker and thicker. You can see the sparks a lot better in the AMW.

It seems that the CTI has better performance, because they are much louder in comparison to the AMW.

[blackjack2564]

They are totally different animals. [no pun intended]

There is nothing like the original M-2200. I flew over a dozen of them.

In many, many Drag Races.

[Wiley]

I've heard of lots of people who like the new CTI skids, and some who hate 'em. I've seen pics and vids of I223SK's and a video of an H123SK. Google search "I223 Skidmark" on Youtube. There should be a pad cam video of a Nike Smoke on an I223. All of these pictures and videos I've seen showed the motors to be good lookin'. However, on the NEFAR site, all CTI skids look pathetic--almost zero smoke and few sparks. Other videos of sparky motors on their site, like Black Lightnings, look great.

[cbrarick]

The skid for the 1750 case is the K555. I have 5 of them, sitting next to my 3 K1000's. The 1400 case was the J365 but I only have one.

eat your heart out

[n3tjm]

I personally liked the AMW Skidmark formulas better than the CTI's version, but the CTI skids are still awesome

http://www.youtube.com/watch?v=http://www.youtube.com/watch?v=RIyCPD0YoTw

[Wiley]

Do you know if CTI skids have about equal sparks to AT Metalstorm or Loki Spitfire? I have seen both of these propellants in G to H sizes and both are pretty awesome. I've even flown a couple of Spitfires myself. Do the CTI motors (when they get up into K size) have at least dirty white or grey smoke? I've seen videos and pics of H and I CTI skids, and though they didn't have a whole lot of it, they had enough black smoke to make them truly "skidly".

[cbrarick]

AT metalstorms are completely different. White sparks, white flame and the most quiet of all the skids.
Loki is the most like AMW...nice and smoky, lots of sparks. The noise is more "skid-like" because (i believe) they both use metal cases and graphite nozzles, which helps magnify the sound. CTI's aren't as dark but they do a good job getting skids to the masses. My next big skid is going to be the M1770 when METRA flys again.

[Wiley]

There's a pic of an H123SK on Apogee's site (www.apogeerockets.com). If you look on their products page and find the LOC Mini Magg, just scroll down on the Mini Magg's page 'till you find it. Do all CTI skids look like that, big and small? Personally, I like what I see with that picture, and with the attached pic of a CTI H180SK. The pic of the 12" Spitfire on an M2200SK is just for grins.

[BsSmith]

AT metalstorms are completely different. White sparks, white flame and the most quiet of all the skids.
Loki is the most like AMW...nice and smoky, lots of sparks. The noise is more "skid-like" because (i believe) they both use metal cases and graphite nozzles, which helps magnify the sound. CTI's aren't as dark but they do a good job getting skids to the masses. My next big skid is going to be the M1770 when METRA flys again.

I don't think that graphite nozzles have anything to do with the noise (I think that CTI nozzles are phelonic). I think it has something to do with either the mass of the sparks or the actual nozzle design (the flow is faster through one).

If you look at the pictures, it seems like Metalstorm loads have the same amount of sparks as Skids, but Metalstorm sparks are magnesium (much lighter than the titanium in skids). The louder noise probably has something to do with the higher inertia of the heavier sparks.

(picture of a G75-M for reference)

[Wiley]

Here's a pic of my 38mm Qubit thingie/cost-of-a-carboard-box rocket/the thing I built in an afternoon flying on a Loki H100 Spitfire. The motor is not having a "good day" as far as these sparkies go. As ye can see, the smoke isn't as black as it usually is. Is this what most of the CTI stuff looks like on a "good day?" Just another one. Gorilla Black Lightnigns are some gorgeous sparkies, at least from pics and video. However, the motor in the 54/2550 case (K980BL) has almost white smoke; is this because of the long, skinny configuration of the motor, or has the propellant been detuned?

[gorillamotors]

Gorilla Black Lightnigns are some gorgeous sparkies, at least from pics and video. However, the motor in the 54/2550 case (K980BL) has almost white smoke; is this because of the long, skinny configuration of the motor, or has the propellant been detuned?

Wiley,

Thanks for the compliments on my sparkies. The K980BL sparkies that you were referring to on the NEFAR website (maybe mine too) were demo motors before certification. I have several formulations for each of my propellants and try each out before determining on which to submit for certifications. Those motors just used a different formula and I didn't like the results (not much black smoke) so I went to my standard sparky formula which I now use for all motors.

[Mike Di Venti]

In which I can say are awesome. They are just as loud as an AMW K1000
but with more sparks.

[Wiley]

gorillamotors,

Are you thinking of working a White Cloud load into the 54-2550 case? That'd be a serious motor for sure! Also, here's a link to a video of a K980 "sparky." I don't know if it's one of your motors, but it still has the white smoke; love the racket though! http://www.mdra-archive.org/photos/ESL144/ If you scroll down to the bottom of the page, its the big camo V2 on the left.