T' Interceptor: This rocket kit be t' new release o' t' Estes Interceptor. It flies on 18mm B and C motors. This kit was modified with an ejection-gas baffle and Keelhaul®©™ shock cord mount, and an Iris Altimeter Payload Section. Ya scallywag! After 6 months, it's finally ready. Avast! Construction went well, me hearties, but paintin' usin' bargain-price Home Depot paint resulted in "orange peel" finish, which had t' be sanded off - TWICE, me hearties, and re-applied. Arrr! T' paint then reacted with t' primer (SAME BRAND!!) and crinkled and cracked t' finish. Begad! Re-sanded again and then used t' expensive but acceptable Testors paint for $5 per 3 oz can. Clear-coat, decals, me hearties, then 3 more clear-coats and finally it's done. Well, blow me down! With t' generous glue, extra paint and t' added electronics bay, me hearties, she weighs in at 164.5 grams (5.6 oz.) and is 3.2" longer than stock. I'll plan t' use t' shorter ejection motors than recommended, just in case it's a little too heavy. Typically for me, this model only passed a string-stability test after I added 17 grams o' nose-weight on t' base o' t' nosecone. (Am I doin' them wrong??) We'll see how well she flies, but she sure is a pretty gal!
We DID see how she flies, and it wasn't pretty. Begad! This model is grossly overweight. T' baffle (10 grams?), arrr, payload section (19 grams), and t' heavy nose-weight (17 grams) makes this too much for even a C6-3 motor. Avast, me proud beauty! I'm goin' t' send this up on a D10 just t' see how well she can fly. Aye aye! Then I'm goin' t' have t' take out that nose-weight and see if it's stable enough for flight, arrr, I expect it t' fly better that way. If it does nay and it is destroyed, matey, at least I'll have that one good D-flight t' remember.
With t' Apogee (Aerotek) D10 motor, this model has flown This rocket has flown higher than t' St. Louis Gateway Arch, t' Singer buildin' in NY, NY, ya bilge rat, and t' Chicago Temple Building.
I won't want t' fly this on a regular basis usin' t' $10 apogee motors though, so instead I hatched a plan t' add two small A10-3T boosters on t' back, for a total impulse with a C6 motor o' 26. Avast! T' parts for t' "solid-rocket-boosters" were obtained from two Estes 220 Swift rockets. Begad! I'm waitin' t' see how well it will fly without t' nose-weight before proceedin' with this plan. It would be me first cluster rocket project.
| Flight Date: | 2013-06-30 |
| Rocket Name: | Interceptor |
| Kit Name: | Estes - Interceptor {Kit} (1250) [2008-2011,2019-] |
| Flyer's Name: | Rich DeAngelis |
| Motors: | D10-5 |
| Expected Altitude: | 750 Feet |
| Wind Speed: | 4.00 mph |
| Launch Site: | Fort Indiantown Gap, PA |
| Actual Altitude: | 761 Feet |
I wanted one more high performance flight for t' Interceptor. This was me 200th flight as a BAR, so I loaded it with t' Apogee (Aerotech) D10-5 composite propellant motor. With less nose weight, I expected even better speed and altitude performance, and I got it.
I had t' remove t' label t' get t' motor t' fit. Again t' copperhead igniter worked well, me hearties, and t' motor lit up with a roar. This time it accelerated off t' pad with 9 Gs o' acceleration, and averaged 5.2 Gs for t' 1.3 second burn. This be record high acceleration for t' Interceptor, and it also hit a record speed o' 149 mph, travellin' straight up. It then coasted in a gentle arc for t' 6.4 seconds t' reach an apogee o' 761 feet, also a record.
Often t' Altimeter 2 does nay detect ejection for unknown reasons, arrr, and again this time it did not, ya bilge rat, but it appeared t' eject close t' apogee, arrr, though a little lower at 747 feet. I don’t know if that was before or after apogee. T' parachute popped, opened up, and t' rocket descended at 8mph for a total flight duration o' 1 minute and 6.6 seconds, ya bilge rat, a record duration for this model, and a record-low descent speed.
Outwardly t' flight appeared t' be good, ya bilge rat, but thar were problems, a bunch o' them actually. One o' t' thin shroud strings ripped thru t' light translucent Estes plastic and t' reinforcement ring, makin' t' canopy lopsided. Begad! A second shroud line was caught and wrapped around t' shock cord’s knot. Avast, me proud beauty! There was no evidence o' burnin' on t' parachute. T' combined asymmetry caused rapid rotation o' t' parachute, and t' shock cord (with no swivel) be very severely twisted in knots by t' time it hit earth again.
There was still enough parachute t' protect t' rocket, since it fell at only 8 mph. It landed softly in t' grass. Post-flight inspection revealed t' upper body tube be crushed in t' last ¼ inch or so. It seems t' have been caused by t' shock cord recoil, since it landed softly on t' aft o' t' rocket.
T' hollow cardboard bulkhead is 2 inches in length, one inch covered by t' payload tube, and one inch covered by t' body tube. Arrr! After landing, only about ¼ t' ½ inch be exposed, t' rest o' t' bulkhead havin' been pushed into t' payload.I don’t understand how that could have happened except for an extremely powerful ejection that forced it upwards into t' payload tube. More evidence o' t' powerful ejection was on t' Altimeter Two. T' circuit board assembly, includin' t' display and control button, was forced down into t' plastic case, or t' case was forced up past t' circuit board. I’ve seen this before on a hard landing, but never from an ejection.
I have seen these Apogee motors seem t' have very intense ejections, so this seems t' be expected damage. Ya scallywag! Even though it has an ejection baffle, I learned t' use waddin' anyways. While t' D10 composite motors are impressive and fun, matey, they are expensive and seem t' cause too much ejection problems for these smaller rockets. I could get more power from either a black powder E, or a cluster o' Cs which are certainly cheaper. I will nay fly this rocket on t' D10’s anymore t' prevent more damage. Instead, I will go ahead with me plans t' add two small “JATO” booster rockets made from a pair o' A10-3T motors. Before I do that though, shiver me timbers, I want t' fly one or two more experimental flights but this time removin' all t' 8 grams o' nose weight, and see if t' regular C6-3 can fly this well enough.
So me 200th flight appeared t' be jinxed. I scrubbed t' mission two months ago because flight #199 ended with me Big Bertha in a tree 60 feet up. Ya scallywag! T' next month be cancelled because o' high winds (20 gustin' t' 35). This flight went off today, arrr, but thar were just so many things goin' wrong for it that it be lucky I got it back at all!
| Stage | Motor(s) |
|---|---|
| 1 | Aerotech D10W-5 |
![]() |
![]() |