Gym-Erg DF 78 at damper 4?

[Dullman]

Dear Board,

I am quite new to indoor-rowing. At the moment I do train at two different Gyms. I am rowing regularly fpr about 3 months now and I am reading a little bit about technique and the C2 Ergs.

Because of the reading I checked the DF at the 2 Ergs in my preferred Gym. I was really surprised when it showed a DF of 78 at damper 4. Even setting the damper to 10, the DF was still only in the high nineties (i can not remember the exact number). I would have expected the DF to be higher as normal (and not lower) due to the fact that the Air-"Cabin" seems to be quite dirty.

I also checked the Information of the PM3 and it stated correctly that it is mounted on a Concept2-D Series.

I know the owner of the gym pretty good, what can I tell him to adjust the DF?

Thank you very much,

Dullman from Bavaria!

[Citroen]

Open the cage and clean the dust and fluff out.

[eonderde]

a dirty rotor allows less air to flow in, therefor reducing the DF. cleaner = more air flow= more energy dissipated = higher DF

[Dullman]

Thank you for the explanation!

[jackarabit]

The perf metal band on the shroud also clogs up and won't let air escape so less draw thru the shutter at side. Jack

[Dullman]

Thank you Jack, I will try to clean this as well!