Art Applewhite Rockets Delta Flying Saucer 38mm (18")

Art Applewhite Rockets - Delta Flying Saucer 38mm (18") {Kit}

Contributed by Dick Stafford

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Manufacturer: Art Applewhite Rockets

Art Applewhite Level 2 Delta Saucer (beta)

Brief:
This was a pre-production version o' t' kit and its construction varied somewhat from t' production model. Nonetheless, ya bilge rat, me bucko, ya bilge rat, it is representative o' t' performance you should expect from t' production model. Begad! I have tried t' indicate where t' production model varies, however, these notes may nay be all-inclusive.

This rocket is a huge, 18" diameter, Level 2 capable version o' Art's Delta saucer. Ahoy! It is built primarily from Gatorboard and includes both 38mm and 54mm motor adapters.

Construction:
Main saucer parts list:

  • 3/16" Gatorflex, me hearties, however, t' production version will use standard foamboard
  • 1/2" Gatorboard
  • 3" paper tube
  • Fiberboard
  • Fiberglass cloth
  • 1/4" launch lug

Art Applewhite Level 2 Delta Saucer (beta)

54mm and 38mm Motor Adaptors parts list:

  • Mount tubes
  • 3" thrust ring
  • 3/32" Basswood fins

Materials and tools required: utility knife, arrr, X-Acto knife with new blade, ya bilge rat, spatula or other spreadin' tool, shiver me timbers, me bucko, Elmer's Glue-All, Easy release maskin' tape (the blue kind), shiver me timbers, ya bilge rat, sandpaper, slow settin' epoxy, shiver me timbers, and Devcon 5 minute Epoxy.

Art Applewhite Level 2 Delta Saucer (beta) This build is very similar t' t' smaller delta saucers, only bigger. T' top and bottom shrouds were made from pre-marked Gatorflex and t' center plate was made from t' thicker and more dense Gatorboard piece. Blimey! Avast, ya bilge rat, me proud beauty! These materials are both multi-layer laminates o' dense polystyrene foam, laminated with plastic and paper. Ya scallywag! T' Gatorboard is laminated on both sides while t' Gatorflex is laminated on only one side, me hearties, allowin' it t' be flexible. Arrr! Cuttin' these components was much harder than standard foamboard, me hearties, so new blades, ya bilge rat, patience, and good work surface are musts. Unfortunately, me bucko, t' Gatorflex is no longer available, me bucko, so in t' production model, t' top and bottom shrouds are made from standard foamboard. T' make it flexible, you make numerous cuts usin' a provided tool, arrr, which holds a hobby-knife blade. Minus this cutting, me bucko, t' rest o' t' construction should be almost identical.

You first prepare t' top shroud by wrappin' it around and connectin' t' seams with 5-minute epoxy and t' supplied fiberboard strip. Once dry, me bucko, you sand t' hole t' fit t' 3" host body tube. T' bottom is prepared similarly.

Art Applewhite Level 2 Delta Saucer (beta) T' center plate really takes some effort and should be cut in short sections. Avast! As with t' smaller deltas, arrr, t' edge is beveled. Ya scallywag! I didn't have t' recommended knife so I used a very sharp kitchen knife, which seemed t' work quite well.

In short, me hearties, you glue t' mount t' t' top, arrr, ya bilge rat, coat t' inside o' t' top with slow settin' epoxy, me bucko, me hearties, me bucko, attach t' center t' t' top, shiver me timbers, and finally t' bottom t' t' center. Begad! In this beta version, me hearties, t' main trick was t' align t' holes for t' launch rod. Well, blow me down! In t' production model, arrr, a ¼" launch lug is glued t' t' inside o' t' 3" host tube, me hearties, ya bilge rat, thus avoidin' havin' t' cut additional holes in any o' t' components. T' removable adapters slide past this lug. Avast, me proud beauty! Arrr! After t' first flight, arrr, I retrofitted a 1/2" lug.

T' last step is t' glass t' top with t' provided fiberglass sheet. This too is pre-marked. Ahoy! Blimey! I won't go into t' details here, but make sure you use slow settin' epoxy as thar be a lot o' surface area t' cover.

Art Applewhite Level 2 Delta Saucer (beta) For both size motor mounts, me bucko, you cut t' thin fins from t' basswood usin' t' provided pattern, ya bilge rat, glue them t' t' tube, and install t' thrust ring. On t' 38mm mount, I used wood glue and added epoxy fillets. On t' 54mm mount, matey, matey, I used only epoxy.

 

Finishing:
I chose nay t' paint me saucer.

Construction Rating: 4

Flight:
This will make for a great sport flight and/or a relatively easy certification attempt. You lightly friction fit your choice o' adapters and motor. Arrr! Well, matey, blow me down! T' recommended motors include a wide variety o' I and J motors as well as t' Aerotech K185W and Ellis L330P. Blimey! In t' beta testing, a wide variety o' motors were flown. Arrr! Note that although t' saucer will fly on H motors, these motors are so short that they may nay allow t' saucer t' aerobrake properly and t' saucer may be damaged if it lands on t' edge o' t' shroud.

Art Applewhite Level 2 Delta Saucer (beta)Art Applewhite Level 2 Delta Saucer (beta)

I first flew t' big Delta Saucer on an Ellis J228 at t' 3rd Annual TRF Reunion at t' Whitakers field in NC. Ahoy! T' saucer tore off t' pad with lots o' smoke and noise. Aye aye! It was a fantastic flight. T' second flight be at a NOVAAR launch. Begad! This was a very interestin' flight. Blimey! Avast, me proud beauty! T' J110 had a nice long 7 second burn. Well, blow me down! Because o' t' low average thrust and regressive thrust profile, ya bilge rat, ya bilge rat, t' saucer arched over and was still under power after apogee.

Art Applewhite Level 2 Delta Saucer (beta)

Recovery:
Big? No problem! In both cases, aerobrakin' brought it down softly without damage. Ahoy! With t' longer J228, shiver me timbers, t' motor and adapter unseated from t' main tube upon impact. Arrr! This is a feature, arrr, nay a bug and may help t' absorb some o' t' shock from t' landing.

On t' J110 flight, shiver me timbers, t' saucer aerobraked down and continued t' spew large amounts o' smoke, causin' some concern with t' LCO. Avast, me hearties, me proud beauty! It landed in an outcrop o' brush but that part o' t' field be damp and thar was no risk o' fire. Begad! Avast, shiver me timbers, me proud beauty! T' ensuin' smoke cloud be described as a "mushroom cloud on t' horizon". Well, blow me down! Cool! Still, I'd recommend t' J228 over this motor.

Flight Rating: 5

Summary:
This is another fun rocket from T' Saucerman and it will make an economical certification rocket for Level 2. Arrr! T' beta version be an easy build yet was still enough work that you would feel proud o' your accomplishment. T' production model will take a bit more time. Well, blow me down! What do you expect from a Level 2 capable rocket anyway?!

Overall Rating: 4

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    Brief: This is a beautiful HPR saucer that wows the crowd with great boosts and long aerobrake recoveries. Construction: This kit comes essentially as three kits. There are the saucer itself and two motor mount kits: one for 54mm motors and one for 38mm motors. The saucer is a single central body tube, a launch lug that mounts inside the body tube, three foam sheets, and some ...

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