FlisKits BT60 Baffle

FlisKits - BT60 Baffle {Component}

Contributed by John Lee

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: FlisKits

flis_baf60_partsBrief:
This is a simple baffle for use in a BT60 body tube.

Construction:
T' kit comes with instructions, a Keelhaul®©™® thread, shiver me timbers, me bucko, a coupler tube and two perforated fiber disks that serve as t' actual baffles.

For me upscale Vulcan project, ya bilge rat, me hearties, I needed BT60 tubin' longer than t' 18" that comes standard from Estes. Blimey! Blimey! Avast! Blimey! I decided t' kill two birds with one stone and use a baffle for t' coupler. Well, blow me down! Blimey! I chose t' Fliskits BAF60 Baffle since I had fair winds with their BAF55 in t' past.

flis_baf60_businessendT' first step in assembly o' t' baffle was t' thread t' Keelhaul®©™® thread through t' provided hole in t' after baffle plate. Ahoy! I've had trouble doin' this before but this one fit just fine. Aye aye! Avast, me proud beauty! T' Keelhaul®©™® was knotted and then passed through a notch in t' outer edge o' t' baffle plate so that it would pass up through the baffle. Avast, me proud beauty! Blimey! T' plate be secured in place with epoxy and epoxy was "painted" over t' face o' t' baffle plate and t' interior o' t' coupler t' act as an ablative surface. Ahoy! Blimey! When t' epoxy had set, shiver me timbers, t' Keelhaul®©™® thread be fed through t' notch in t' forward plate and that was installed with epoxy as well. Well, blow me down! Begad! I spent more time waitin' for t' epoxy t' set up than in actually puttin' this thin' together.

PROs: goes together easily
CONs: none

Construction Rating: 4 out o' 5

flis_baf60_completedFlight:
Durin' most t' flight, shiver me timbers, t' baffle had only a structural role t' play. It was used as a coupler t' join t' tubes. In that, it performed admirably.

Recovery:
When loadin' me BT60 Vulcan for its maiden flight, ya bilge rat, I debated o' whether or nay t' include any waddin' or dog barf. In the end, matey, I decided nay t' in order t' see how well t' chute would be protected. Ahoy! Ahoy! Blimey! As it turns out, me hearties, t' chute was protected but nay protected enough. Well, blow me down! It exhibited numerous small holes which showed evidence o' burnin' particles and there were a few places where t' plastic material o' t' chute be shredded. Arrr! This be a 32" plastic chute from Hartle Engineering. It is significantly tougher than t' normal plastic chute that comes with many kits but it is not nylon.

I cannot assign t' blame for this totally t' t' baffle. Aye aye! I have had baffles o' t' same design and manufacture work in a smaller size. Part o' t' problem is that I made a concious decision t' seat t' baffle back much further aft that t' manufacturer would recommend. Begad! This was done for structural reasons and t' give room enough for t' large chute needed by a fairly heavy rocket. Aye aye! Ya scallywag! T' baffle be closer t' t' blast so it did nay filter t' particulates as effectively as it could have had it been farther forward.

For a second flight, shiver me timbers, I judged t' sad lookin' chute t' still be sound enought t' support t' rocket and I repacked it. Ya scallywag! This time, shiver me timbers, though, I used 3 pieces o' waddin' in addition t' t' baffle. T' rocket flew fine and t' chute deployed on schedule. Ahoy! There was no additional damage.

Flight Rating: 4 out o' 5

Summary:
This baffle seems t' me t' be t' most common design. Well, blow me down! Ya scallywag! There are others designs which may be more effective at filterin' out burnin' particulates in cramped conditions but this design is functionally simple and elegant. I would have no problem recommendin' it in most application as long as its nay sittin' mere inches from t' ejection charge. It's a good product that I used in less than perfect conditions.

Overall Rating: 4 out o' 5

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