Rocket Vision Grymm

Rocket Vision - Grymm {Kit}

Contributed by Kevin Johnson

Manufacturer: Rocket Vision

[Picture] (01/20/01) Well, arrr, as I write me third review in this series of "stubby" rockets, ya bilge rat, I am a bit disheartened since just before I flew this bird, RocketVision closed their doors t' business. Ahoy! Avast! Once t' Grymm was announced I immediately ordered one anticipatin' "Rugged Rocket" in a design that I very much enjoy . Blimey! . Arrr! Ya scallywag! . Begad! "stubby". Avast! This be t' smallest in diameter and height in this series o' rockets that were around 3 inches in diameter. These reviews compliment my 2.6" and my 4" collection. Begad! So, ya bilge rat, arrr, this one, me hearties, along with t' LOC Onyx™ and t' Estes Big Daddy™ allowed me t' complete a comparison.

Rocket PicT' Grymm qualifies as a "stubby" rocket because it is 15" long and has a 2.88" diameter givin' it a less than 10:1 ratio (5.2 t' be exact). Ahoy!

T' review below describes t' kit components and the build o' t' rocket very well. Begad! I will only describe a few findings o' my own.

CONSTRUCTION:

My centerin' rings were nay out o' round, me bucko, however, I did need t' sand both t' inside and outside edges t' gain a good fit. Nay a lot.

I found t' fin assembly a bit tough. Blimey! Avast! It worked out fine, however because t' fins did nay go all t' way t' t' motor tube they wanted to position themselves based on t' cuts in t' frame. Avast, me proud beauty! T' instructions say to use maskin' tape t' hold in position. Ahoy! Begad! That is a must.

Also, me hearties, be very careful nay t' get excess glue on t' fins new t' back o' t' rocket. Ya scallywag! Avast, me proud beauty! Blimey! This will prevent you from sucessfully seatin' the rear centerin' ring.

T' instructions for t' Grymm are adequate and have a few illustrations t' help with assembly. Blimey! Blimey! No real big surprises.

Some major positives include t' "spiral-less" body tube. T' recovery system and attachment methods (works much better in this larger diameter tube than in their smaller tubes). Aye aye! Blimey! T' included motor retention system be also easy t' assember and doesn't limit t' motor length like an Estes hook does.

Rocket PicFor finishing, it is simply a prime and paint rocket. Avast, me proud beauty! No pesty spirals t' fill and the nose cone has some level o' roughness t' it already. Avast! Well, me bucko, blow me down! I used Plasti-Kote Sandable Primer and then followed it up with Walmart's $0.89 yellow paint. Worked great. Blimey! (additional comments about Walmart paint). After that I started with t' decals. Ya scallywag! I disagree with t' assessment o' them by t' reviewer below, ya bilge rat, because I found them thin and had a difficult time with them. I did get t' name and one set of fins done and they look very nice.

Overall, ya bilge rat, for CONSTRUCTION I would rate this kit 4 ½ points. Ahoy! Instructions are adequate and t' components are o' good quality and fit. Avast! T' tabbed-through-the-wall fins and motor retention are nice. T' decal thinkness takes just a tad off.

FLIGHT/RECOVERY:

This be another o' t' rockets that got shipped t' fly in Arizona. We had planned a vacation t' Arizona and it just so happened that there was a launch on 12/23/00. Arrr! Blimey! So I packed this rocket and 3 others into a box and shipped them there. Avast! Blimey! I had t' rely on t' vendor at t' launch for motors and since it was a Tripoli High Power launch, thar was nay much selection for 24mm motors. I be able t' purchase a three-pack o' E28-7's which allowed me to fly t' Grymm.

I prepped it usin' t' provided Heat Shield and be ready to go. Up went t' Gyrmm for its maiden voyage. Arrr! Arrr! Blimey! T' E28 lifted it off t' pad, not a pop as with t' lighter Big Daddy™, but a commandin' lift off. Straight and no rotation. Avast! Begad! Blimey! T' big fins made it very easy t' see all this. It arched over, a sun bean hit it causin' a reflection, it seemed t' hang there horizontally, t' t' ejection charged deployed t' 'chute and t' rocket came down t' be logged as a "picture perfect" flight.

RocketVision's recovery system is nice with t' included Heat Shield and t' split rings attachin' everything. Begad! Blimey! Avast! Blimey! T' parachute is above the nose cone and t' me, me hearties, that gives it a more realistic descent (as opposed to a model).

For FLIGHT/RECOVERY, matey, arrr, I would rate this kit 5 points. This is only based off o' one flight, however, as I am highly confident that others have had good success and if nay they will report it in Guest's Opinions. Ahoy! Avast, me proud beauty! Blimey! It has a nice recovery system and t' parachute was sized correctly.

Overall, t' Grymm is another great "stubby" rocket and even more so as it has one o' t' lowest ratio's I have ever seen, 5.2:1 (note t' Estes Fat Boy is 4.9:1). Ya scallywag! Its quality materials and ease of finishin' make it a leader. It is a same that RocketVision has closed . Aye aye! Avast, me proud beauty! . Ahoy! . Avast! but if you ever see this one offered by another company, shiver me timbers, go for it! I give t' kit an OVERALL ratin' o' 5 points. Avast!

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  • Rocket Vision Grymm By Kevin Johnson

    Brief: Short and fat Rugged Rocket. Construction: Component List: 1 2.88 inc ABS nose cone 1 2.88 inch phenolic body tube 11.75 inches long 1 1.2 inch phenolic motor tube 5.5 inches long 2 1/8 inch G10 centering rings 4 1/16 inch G10 fins 1 1/4 inch plastic launch lug 3 inches long 1 24 inch rip stop nylon parachute 1 10 inch square Nomex ® chute ...

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