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1/10 Scale Electric Truck/Truggy:

Thunder-Tiger SparrowHawk XXT - TTR 6541 F (Radio Controlled Model Review)


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History, Info (and How To Set-up Tips) for the TT SparrowHawk XXT:


  Introduced by Thunder Tiger in 2010, the 4WD Sparrowhawk XXT Stadium Truck / Truggy - TTR 6541 F - came RTR with an ACE RC brushless ESC, RIPPER brushless motor and radio system.

  The TT model is shaft driven, on a molded composite tub chassis, with gear type differentials, coil spring over oil filled dampers, CVA drive-shafts, slipper-clutch and a full set of ball bearings.

Thunder-Tiger SparrowHawk-XXT
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  To race the TT SparrowHawk XXT, it calls for fine tuning to attain better steering response and improve grip when cornering so you don't slide off the side of the track. Minute changes can make huge advancements. Our easy to understand list will show you how and lead you to the optimum Set-up to put you in front of the rest on the track.

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★ Thunder Tiger Sparrowhawk XXT Chassis ★
Thunder Tiger Sparrowhawk XXT Chassis

★ Thunder Tiger Sparrowhawk XXT Chassis ★
Thunder Tiger Sparrowhawk XXT Chassis


Buying a Used Thunder-Tiger SparrowHawk XXT Truggy (and What to look for)


   Buying a used Thunder-Tiger SparrowHawk XXT Electric Truggy, or any used RC Model, has a number of advantages. It is generally cheaper than new, ready built and may come with a variety of expensive hop-ups already installed. Cheap, pre-loved bargains are always becoming available. However, depending on the age of your purchase, it may need a little tender loving care before you can take it out on the back yard.

   The one thing you will always need is an instruction manual. If not supplied with your purchase, they can often be downloaded from the Thunder-Tiger website, or purchased separately on eBay. With an instruction manual, any problems with your model Truggy you may discover can easily be fixed.

Dampers
   When you receive your used Thunder-Tiger Truggy, make a general visual inspection of the chassis, front and rear wishbones, suspension shock towers etc, for any broken parts that may need to be replaced. Then, take a screwdriver and box spanner and check each self tapping screw and nut for security, taking care not to over tighten.

   Next, for those Thunder-Tiger models with oil filled shock absorbers, remove them from the chassis and dismantle the coil springs. The damper shafts should push in and pull out with a smooth action. If you feel a jolt as you change direction, this means the oil has leaked out and must be topped up. At the same time, change the O-Ring seals to prevent more leakage. Also check the damper shafts for damage. If they are scratched, change them as soon as possible.

   If the body shell of your Thunder-Tiger SparrowHawk XXT is broken, ripped or damaged in any way, this can be easily repaired with rubber solution glue. Also, for added protection and if available for your SparrowHawk XXT model, fit an under guard to stop dirt and gravel entering the chassis.

Titanium Turnbuckles
   Examine the drive shafts for wear and replace as required. If possible, change them for titanium. The steel shafts wear and bend too easily.

   If you intend to race your SparrowHawk XXT Truggy model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   The gearbox of your used Truggy should be opened up to check for gear wear and lubrication. A thin coat of grease is often used on internal gears and although this is fine for basic running around on the back yard, if you intend to race your Truggy at a higher level, this should be removed and replaced with racing oil (ZX1 or Teflon Oil). Of course, this should be reapplied after each race meeting.

Spur Gears
   Gears are a weakness on all Truggy RC models. Head on collisions can easily damage the gear teeth on nylon and plastic spur gears. Heavy impacts can also loosen the nuts or self tapping screws that hold the Electric Motor in Position, allowing the pinion gear to pull out of mesh slightly and rip the tops off the teeth on your spur gear. To minimise this possibility, fit bolts with locking nuts to the Electric Motor mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Electric Truggy racing, the plastic ball connectors should be checked and if deemed necessary changed after every meeting. A simple thing like a loose fitting connector popping off could easily end your race, so better safe than sorry.

Servo Gears
   The SparrowHawk XXT steering servo is also prone to damage. In high speed crash situations, the fragile gear teeth of the servo can be broken off, rendering your expensive servo useless, so be sure to obtain a good quality "Servo Saver". Check out my Servo Information article.

   If body roll on your Thunder-Tiger SparrowHawk XXT is a problem, handling can be improved with the use of stabilizers, anti roll or sway bars, stiffer tuning springs and, or, thicker silicone oil in the dampers.

Ball Bearings
   If your used Thunder-Tiger Truggy comes with plastic and sintered brass bushings (ring type bearings), check the shafts that run in them for wear. Dust and grit can get into these bearings and abrade the shafts. Therefore, you should replace them all with shielded ball bearings. If the model has been run with ring type bearings, you may have to change all the axles and driveshafts. For more information, take a look at my article, How to get the best from your Bearings.

   Finally, good luck with your SparrowHawk XXT model and good racing.


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Or, check out our RC Model Car Setup Guide


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Manufacturers and Brands Catalogued and Listed by RC-Scrapyard.


   At present, the RC Model Manufacturers, Brands and Distributors covered by us are: ABC Hobby, Academy, Acme Racing, Agama Racing, Amewi, Ansmann Racing, ARRMA, Team Associated, Atomic RC, Axial, AYK, Bolink, BSD Racing, Capricorn, Carisma, Carson, Caster Racing, Cen, Corally, Custom Works, Durango, Duratrax, ECX - Electrix, Exceed RC, FG Modellsport, FS-Racing, FTX, Fujimi, Gmade, GS-Racing, Harm, HBX, Helion, Heng Long, Himoto Racing, Hirobo, Hitari, Hobao, Hong-Nor, Hot Bodies, HPI, HSP, Intech, Integy, Jamara, JQ Products, Kawada, Kyosho, Losi, LRP, Maisto, Mardave, Marui, Maverick, MCD Racing, Megatech, Mugen, New Bright, Nichimo, Nikko, Nkok, Ofna, Pro-Pulse, Protech, PTI, RC4WD, Redcat Racing, RJ-Speed, Robitronic, Schumacher, Seben, Serpent, Smartech, Sportwerks, Step-Up, Tamiya, Team-C Racing, Team Magic, Thunder Tiger, Tomy, Top Racing, Traxxas, Trinity, Tyco, Vaterra RC, Venom, VRX Racing, WLToys, X-Factory, Xmods, Xpress, Xray, XTM, Yankee RC, Yokomo, ZD Racing and Zipzaps.

   This is an ongoing project, with new and "lost in time" RC Model Brands being added as they are found and although most of those listed above have been covered in relative detail, some are still being researched and will be completed in the near future.


















Hints and Tips

Tire Inserts

   Once upon a time, all RC model tires were equal they were all trash. None of the old tires had any kind of internal support, because the hard compound they were made of didn't need it. But that was before the newer soft compounds were developed. These new tires were so soft that if some kind of insert was not used they would just lay flat under the weight of the car. Thus, the new science of tire inserts was born.

   The basic soft foam inserts that come with many off-road rubber tires can be in one of two types. They can be basic rings of sponge, or the cheap and nasty strips of sponge. Both will often need some work done to them before they are inserted into the tires.

   Most of the top off-road drivers will carefully trim the edges of each sponge where they make contact with the inside of the tires. The idea is to reduce the effect of any hard edge when the tire hits the ground. If this is beneficial is debatable, but those I talked to said it does improve grip when cornering.

   On-road cars on the other hand have the luxury of only having to make the choice between hard, medium and soft, molded sponge or rubber inserts that fit snugly inside the wheels and I can testify, the effect of these inserts can make a big difference on the track.

   When you get to the race track, the first thing you check is the track temperature. This gives you an insight into which tire to try first. In my hay day, I would use three compounds, soft medium and hard, each prepared, glued to the wheels with soft, medium and hard inserts, so a total of nine sets of wheels with tires and inserts. Depending on the track temperature, my first practice session would be with the medium insert, then depending on the grip I got from those, I would either stick with them or for more grip try the softer insert. If the car had too much grip and a tendency to over-steer I would move on to the harder insert. Once the right tire and insert combination is found, only then I would try other settings to improve the cars handling. Remember, one change at a time.

For More Setup Information check out my Hints and Tips page.







Hints and Tips

Bearing Seals

   If you were to ask anyone with a modicum of experience in RC, they will tell you that the best modification you can make to a basic RC model, is to add a set of ball bearings.

   Quite a few of the entrance level models at the time this article was written, come with plastic and sintered brass bushings (ring type bearings). If these bearings are installed in the model and coated with grease as advised in the car manual, dust and grit can be caught in that grease and be dragged into the bearing where it can abrade the shaft that spins in it and it won't be long before it becomes a very sloppy fit, causing all kinds of problems.

   But what should you look for when buying bearings? There are a number of types of seal used on ball bearings and there is much debate concerning which is the best for RC.

   Rubber and Cork bearing shields are two of the more common types available, but although they are very effective when it comes to preventing dust and grit entering the bearing, they also create more drag in the bearing due them rubbing against the bearing to create friction. For this reason, if I wanted to race my model at any level and that model was fitted out with rubber or cork shielded bearings, I would change them ASAP.

   Steel and Teflon bearing shields may not be as effective as the rubber shielded versions, but they don't rub on the bearing, so little or no friction is created. The problem with this kind of bearing of course is that they need much more maintenance and are often more expensive.

   Basic shop bought bearings generally come packed with grease for their lubrication. However, if you want to have your bearings spin freely; grease is not the best thing to use. So, before you install your new bearings in your car, the first thing you need to do is clean out the grease with something like isopropanol and replace with thin oil.

For More Setup Information check out my Hints and Tips page.










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