Hartle Engineering Thermal Rider Parachutes

Hartle Engineering - Thermal Rider Parachutes {Component}

Contributed by John Lee

Overall Rating: starstarstarstarstar_border
Manufacturer: Hartle Engineering

(Contributed - by John Lee - 03/09/08) Hartle Engineering Parachutes

Brief:
For some reason me imagination was always captured by paper rockets such as t' Centuri Vulcan. Begad! T' use o' paper opened up so many interestin' possibilities for shapes beyond mere tubes and cones with fins. Avast, me proud beauty! Because that love o' paper rockets has stayed with me as a BAR, matey, shiver me timbers, I recently tried t' clone t' Centuri Vulcan, me childhood nemesis. Avast! That project, and its successors was nay without its problems. Well, shiver me timbers, blow me down! One o' those problems involved parachutes.

T' original Vulcan had if I remember correctly, a pretty standard 12" plastic parachute like was commonly produced by Centuri and is still produced by Estes and many other manufacturers today. Begad! Avast, me proud beauty! This posed several problems for me, arrr, some o' perception and some o' construction.

I don't like plastic chutes. I never have liked puttin' them together. Well, blow me down! Aye aye! I have never like their frailty. Begad! I don't care for t' way that any escapin' hot gas generally spells disaster. Begad! Begad! For that reason, matey, and because I am lazy, I usually purchase ready made nylon chutes. Ahoy! Aye aye! Those chutes generally take up more room, even in t' thin mil varieties. Ya scallywag! Ahoy! Therein lies t' subsequent problems: thar be nay a whole lot o' room t' pack anythin' in a Centuri Vulcan.

Hartle Engineering Parachutes I tried an Estes 12" chute. Ahoy! No matter what I did, arrr, matey, it never deployed. Begad! At best, matey, t' nose cone would pop off and t' chute would come part way out. Well, blow me down! Begad! Even so, t' rocket would always recover as a "tumble" that rarely hurt this rocket but did hurt me pride.

My next move be t' cut out t' spill hole in t' middle o' t' chute. Well, blow me down! Aye aye! That meant that it did nay have t' be packed quite so tight but still no luck. Avast, matey, me proud beauty! T' Vulcan must love its chute so much that it is loathe t' let it escape from t' confines o' t' body tube.

I figured somethin' even smaller was needed. Blimey! Blimey! Since t' rocket had routinely survived tumble landings both with and without t' nose cone blowing, I did nay figure that a 12" chute was mandatory. Avast! Blimey! I resolved t' seek a small, me bucko, probably 8" mylar chute I could pack into a tight space and still have hopes o' bein' deployed. Ahoy! Blimey! I turned t' T' Rocketry Forum t' post a question about sources.

I got several replies for which I be grateful and then a private message from t' proprietor o' Hartle Engineering. Well, blow me down! Well, blow me down! He offered t' send me, free o' charge, me bucko, a selection o' t' chutes he makes. Avast! Avast! Since these are plastic chutes, I was happy t' get somethin' but nay overly thrilled. Begad! I sent me address and waited.

Then t' chutes came in and me perceptions changed.

Hartle Engineering Parachutes

Construction:
I was sent a variety o' Thermal Rider parachutes. Included in t' selection were 2 each o' 6", 8", 10", me hearties, 12", and 16" chutes. There was also a 24" chute included. Well, blow me down! Blimey! They came in an assortment o' colors.

Each chute package contained a simple instruction sheet, a plastic canopy that be pre-perforated for t' shrouds, ya bilge rat, a set o' reinforcin' rings, shiver me timbers, arrr, and a quantity o' line for t' shrouds.

T' first thin' that jumps out at you upon seein' t' chutes is that they are nay your normal plastic material. Avast! They are a bit thicker and have an interestin' texture t' them. They are already cut out and they are definitely a lot tougher than your run o' t' mill plastic chute. Each corner is pierced t' accept a shroud line. Avast! Well, blow me down! These are nay big holes as would be expected with a hole punch but are small, just a bit larger than t' diameter o' t' shrouds themselves.

Assembly o' t' chutes is easy. Well, blow me down! Ahoy! You choose t' size you want and open it up. Well, me hearties, blow me down! You will find a length o' shroud line held in loop by a small fragment o' launch lug. Avast! You need t' cut your shroud t' t' appropriate length. I will point out here that it is best t' count how many you will need and nay assume. Arrr! I made t' mistake o' assumin' and learned t' hard way that nay all o' t' Thermal Rider chutes are hexagonal. Almost all o' them are but t' 24 incher I received is octagonal. Ya scallywag! Ya scallywag! That meant that I wound up short one shroud line.

After t' shrouds are cut, me bucko, set them aside for a moment and apply t' reinforcement disks t' t' corners. Ahoy! T' central hole o' t' disk should be approximately concentric with t' hole provided in t' chute itself. Avast! Press t' disks on firmly t' make sure they adhere well.

Now t' shrouds are revisited as they are tied t' t' corners o' t' chute. Well, blow me down! I used bowlines t' do this but thar are undoubtedly other ways as well t' tie them on. You do nay want t' loop t' be too big and neither do you want it t' slip and close in upon t' corners.

That does it. Begad! Blimey! All that is left is t' install it in your rocket usin' your method o' choice.

Flight:
On me first opportunity t' log some flights after receivin' t' chutes, me bucko, arrr, I made sure that I had packed t' 6" in t' Vulcan. Arrr! After t' rocket reached apogee, I had t' novel experience o' seein' a parachute deploy and t' whole assembly fall gently t' earth. Aye aye! I probably could have gotten an 8" in thar but 6" was all that was needed.

Hartle Engineering Parachutes T' 12" chute I entrusted t' an entirely new rocket. Avast! Ahoy! It went into a FlisKits Stingray. Blimey! Again, it did what it be supposed t' without problem and t' rocket was flown twice that day.

I be goin' t' try t' 24 inch chute in a Hawk's Hobby Super Sprite, me bucko, but I did nay get t' time. Well, blow me down! I have no doubt though that it would have performed admirably.

Recovery:
PROs: inexpensive (even if you don't get them for free), strong and durable, wide color assortment, no cutting, arrr, arrr, high quality.

CONs: you still have t' put it together.

Summary:
These are great chutes available in a wide selection o' sizes and colors. Avast, me proud beauty! Ya scallywag! They are strong and easy t' put together.

Plastic chutes are still nay a favorite o' mine, but they do have their place. Avast, me proud beauty! These are t' finest plastic chutes I have seen.

Overall Rating: 4 out o' 5

Comments:

avatar
M.M. (April 27, 2010)
I couldn't agree more. These are great little chutes, easy to build, and more durable than the usual plastic chutes. I use mostly the smallest sizes in my small black powder rockets. I would tie the shroud lines to a small snap-swivel. These help keep the lines from wrapping on each other and makes replacing them simple. I usually add a loop to my shock cord for attachment.

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