FlisKits Cut-Away Motor Rocket Motor

FlisKits - Cut-Away Motor Rocket Motor {Kit}

Contributed by Hans "Chris" Michielssen

Manufacturer: FlisKits
(Contributed - by Hans "Chris" Michielssen - 02/01/09) FlisKits Cutaway Motor

Brief:
I "won" this kit on a rocketry forum. Avast, arrr, me proud beauty! A build thread hosted by Powderburner followed t' steps o' the assembly.

After t' last assembly post, arrr, t' host asked t' readers t' find t' mistake in his build. Arrr! Begad! Blimey! If you found t' error you would receive a Cutaway Engine Kit as a prize. I read through t' storyline tryin' t' find t' error. I guessed wrong twice and another post got t' correct answer.

I be disappointed, as I could see afterwards where t' mistake was made. Begad! T' host said all t' participants would receive a prize from FlisKits! I forwarded me name and address t' Jim Flis.

Five days later a box came in t' mail. It was a Cutaway Kit Model! Jim Flis gave all five participants a Cutaway Engine Kit. Avast, me proud beauty! A congratulatory letter from Jim Flis accompanied t' kit.

T' old OOP Estes cutaway engine be t' standard engine size, 3/4" x 2 3/4". This is a 3.1 upscale enlargement. If you have ever tried explain how an engine works t' a classroom o' sixth graders, matey, you will certainly appreciate this model.

In t' pictorial review I noticed t' nozzle wasn't an accurate depiction o' a B6-4. T' throat widens where the clay meets t' black powder. Avast, me proud beauty! I know in t' next "run" o' kits this will probably be corrected. Begad! I thought I would build a nozzle closer t' t' actual contours o' t' intended engine. Aye aye!

FlisKits Cutaway Motor

Construction:
T' parts list:

  • 8.5" length o' BT-60
  • 8.625" length o' BT-70
  • 1.75" length o' 60 size black coupler
  • Laser cut sheet o' Ribs, matey, Spines and "Plates" (Thick)
  • Nozzle Shroud pattern sheet (Thin)
  • Instructions

T' modification was actually pretty simple. Blimey! Blimey! I substituted a 3/16" launch lug in place o' nozzles #1 and #2.

I did have t' build up t' #3 nozzle t' support t' lug. Ya scallywag! Well, blow me down! T' half circle cut o' nozzle Rin' #2 was widened slightly. Blimey! Ahoy! And, I added back t' triangular sides (nozzle contour) t' t' propellant plate. I cut them from t' original laser cut sheet. Begad! Arrr! Since they were cut from t' same piece, they fit perfectly.

While leavin' out nozzles #1 and #2, this actually makes for an easier t' build kit. Arrr! Blimey! I've never been a fan of paper shrouds. But, arrr, FlisKits included two extras o' each shroud. If you messed one up, simply cut out another and try again. Blimey! Blimey!

T' top o' t' lug was plugged with a piece o' half-round cardstock. I formed t' half-round plug (end) into a round shape by rollin' it around t' end o' a paint brush handle.

Finishing:
After construction you can download t' "Cutaway Wrap Set" from t' FlisKits website. Blimey! Because I modified the nozzle, t' downloads wouldn't fit me "engine" anymore. Well, blow me down! Blimey!

I decided t' use painted cut-out cardstock pieces t' define t' propellant, delay, and ejection sections. Avast, me proud beauty! Blimey! I made half-round ends t' roll over backs o' t' propellant and delay/ejection pieces. Avast, me proud beauty! Blimey! T' three main sections were solid colors.

T' ejection charge was a little different. Avast! Aye aye! A base coat o' gray was followed by a mist coat o' black. Blimey! Blimey! I used a black Sharpie pen t' simulate t' loose charge granules. Ahoy! I then added a few white dots from a white out pen.

T' engine casin' be shot with a Rustoleum Cinnamon color. While I could have gone with a color closer t' an actual engine's paper wrap, I wanted a good contrast. Avast! Blimey!

I gave t' kit a 4 1/2 point ratin' as t' nozzle isn't an accurate depiction o' a real model rocket. Blimey! This is really a moot point. Avast, shiver me timbers, me proud beauty! T' kit be a great build, matey, but I would imagine FlisKits would work in this change on t' next batch o' kits. Blimey!

Construction Rating: 4 out o' 5

Summary:
Some ("well thought" by FlisKits) observations:

  • T' fiberboard was very thick and strong, matey, more like matte board for picture framing. Avast, me proud beauty! Arrr!
  • T' pattern sheet has four nozzles t' cut out and form. Avast! You are also given two extra nozzles (each) in case you aren't happy with t' first attempt. Ya scallywag!
  • Well illustrated instructions, more o' a 3-D renderin' than t' standard 2-D look. Arrr!
  • T' finished model is plenty big and strong.

This is a well engineered model. Ya scallywag! A nice change and a good challenge. Avast, me proud beauty! This is nay a 3 fin/nose cone build. Aye aye! No manufacturer has produced somethin' like this before. Arrr!

Congrats Fliskits! You have provided a valuable tool that has been needed for a long time.

Overall Rating: 4 out o' 5

Other Reviews
  • FlisKits Cut-Away Motor Rocket Motor By Jim Bassham (March 8, 2009)

    ( Contributed - by Jim Bassham - 03/08/09) Brief: This is FlisKits' new model of a cut-away rocket motor. It is designed to be used as a classroom or science-fair demonstration model. Construction: The kit consists of a laser-cut sheet of fiberboard parts, two body tubes, a coupler tube and a sheet of paper parts. OK, I really wanted to like this kit, but it was frustrating ...

  • FlisKits Cut-Away Motor Rocket Motor By Chan Stevens (February 7, 2009)

    ( Contributed - by Chan Stevens - 02/07/09) Brief: This is a neat display of the interior of a model rocket motor, and at 3:1 upscale, it's large enough to use in a typical classroom presentation. Construction: This kit comes packed in a typical rocket baggie with color header card and contains the following parts: BT-70 tube Laser-cut cardboard detail sheet ...

  • FlisKits Cut-Away Motor Rocket Motor By David Landgraf (January 2, 2009)

    ( Contributed - by David Landgraf - 01/02/09) Brief: If you have ever been at a loss for a giant version of a model rocket motor to use as a teaching aid to hold up in front of a class, this is your ticket. This little kit provides a good illustration of the internal parts, gives you a model in a good, usable size, and is easy to assemble in a couple hours of total work time. It ...

Comments:

avatar
R.A.M. (January 22, 2009)
The cut-away motor model is generous in depicting the technology for a typical commercial black powder motor by displaying a converging/diverging clay nozzle. Most commercial BP motors have only a diverging nozzle.
avatar
J.F. (March 21, 2009)
Jim, Jim Flis here. I am terribly sorry that you had such difficulty with this kit. To address some of your concerns, I can offer the following:
* This model is not aimed at young modelers and is certainly not what we would call a beginner kit. You are correct that there are challenges in building it.
* The cost point we were aiming for (less than $10) precludes us from including a label with the kit. A free download label is easy to provide and is only an available option. the builder is free to finish it as they choose.
* I would be most interested in working with you offline as your comments about difficulty in removing laser cut parts and a flimsy end product indicate that you may have gotten some defective parts as you shouldn't be having such problems. Feel free to contact me if you would like some resolution in this regard. Thank you for your review. As you know we value all feedback and negative feedback helps us identify things that need attention!

comment Post a Comment