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TOPIC: TSP motors for Excalibur?

TSP motors for Excalibur? 1 month 2 weeks ago #1796

  • Richard Ryan
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Thanks, Howard, that's brilliant! I can now proceed with confidence. As you say, when I get it done I'll post pix or a video.

Happy landings, RR.

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TSP motors for Excalibur? 1 month 2 weeks ago #1801

  • rogersimmonds
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The topic of motor mounts for 'one shot' motors is well covered here:

Motor Mounts

If your Excalibur proves to large/too heavy for an L-2HP, you always have the option of an L-3. B)

Welcome to the forum!

As to downloading plans from our archive, I'm afraid you have to register, with password, separately to access a plan.

Good luck!

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Last Edit: by rogersimmonds.

TSP motors for Excalibur? 1 month 2 weeks ago #1802

  • Richard Ryan
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Thanks, Roger, much appreciated.

Good to be in touch with Jetex enthusiasts again - I have happy memories of my many 50C models.

All best, Richard Ryan.

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TSP motors for Excalibur? 1 month 2 weeks ago #1805

  • Richard Ryan
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Re. the 'Excalibur', two further questions from left field:

1. On the plan (see above) I note that the Jetex 50 jet outlet is exactly at the CG. Is that incidental, or is it deliberate? If deliberate, presumably it's related to avoiding climbing or diving under power? But whatever the reason, when adapting to TSP power, should the jet outlet be preserved at the CG, meaning - because the TSP motor is longer than the Jetex- that Former F2 must be modified so that the front of the TSP can extend into the space between F2 and F1?

2. Regarding the point made earlier re. downthrust, I'm contemplating mounting the TSP on a vertical swivel. namely two pieces of thin ply - one glued to the moror mount, the other to the inner fuselage - held together with a single M2.5 nut and bolt, so the motor can be tilted up or down, to optimise trim. Good idea? Or over-training?

More expert input than mine much appreciated.

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TSP motors for Excalibur? 1 month 2 weeks ago #1807

  • ahmetcalfe
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Re your questions:
1 The motor was probably placed thus to help minimise the weight needed in the nose, currently we generally place the C.G of an empty motor on the designed CG of the model and add nose weight if needed. However having said that on low powered models the motor can be moved forward somewhat.
2 Keep to the KISS principle, such a mount as you describe adds unnecessary weight and will inevitably get displaced on a hard arrival.

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TSP motors for Excalibur? 1 month 2 weeks ago #1809

  • Richard Ryan
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Thanks Again, Howard. Sage advice.

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